GOST 1050-2013

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  ГОСТ 1050-2013

GOST 1050−2013 steel Products of non-alloy structural quality and special steels. General specifications

GOST 1050−2013

Group В32

INTERSTATE STANDARD

THE PRODUCTS OF NON-ALLOY STRUCTURAL QUALITY AND SPECIAL STEELS

General specifications

Metal products from nonalloyed structural quality and special steels. General specification

ISS 77.140.45
77.140.60
OKP 09 5000
11 4100
11 5000

Date of introduction 2015−01−01

Preface

Goals, basic principles and main procedure of works on interstate standardization established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, application, renewal and cancellation"

Data on standard

1 DEVELOPED by the Federal state unitary enterprise «Central research Institute of ferrous metallurgy them.And.P.Bardina» (FSUE «tsniichermet im.And.P.Bardeen»)

2 recorded by the Interstate technical Committee MTC 120 «Cast iron, steel, rolled"

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol of 3 December 2013 N 62-N)

The adoption voted:

Short name of the country on MK (ISO 3166) 004−97	Country code MK (ISO 3166) 004−97	Abbreviated name of the national authority for standardization
Armenia	AM	Ministry Of Economy Of The Republic Of Armenia
Belarus	BY	Gosstandart Of The Republic Of Belarus
Kyrgyzstan	KG	Kyrgyzstandard
Kazakhstan	KZ	Gosstandart Of The Republic Of Kazakhstan
Moldova	MD	Moldova-Standard
Russia	EN	Rosstandart
Tajikistan	TJ	Tajikstandart
Ukraine	UA	The Ministry Of Economic Development Of Ukraine

4 by Order of the Federal Agency for technical regulation and Metrology dated 28 October 2014 N 1451-St inter-state standard GOST 1050−2013 introduced as a national standard of the Russian Federation from 1 January 2015.

5 REPLACE GOST 1050−88 and GOST 4543−71 in part steel grades 15G, 20G, 25G, 30G, 35G, 40G, 45G, 50G, 10G2, 30G2, 35G2, 40G2, 45G2, 50Г2


Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet

1 Scope

This standard applies to steel hot-rolled, forged, calibrated and with special surface finish, designed for use in various industries.

In terms of requirements to chemical composition standard applies to bars, blooms, slabs, rolled, forged and nepreryvnolityh billets, forgings, stamping, sheet and other products.

This standard applies to metal products of steel grades 05kp, 08KP, 08ps, 10kp, 10ps, 11kp, 15kp, 15ps, 18kp, 20kp and 20ps only part of the requirements to chemical composition.

2 Normative references

The present standard features references to the following international standards:

GOST 103−2006 bars, steel, hot-rolled strip. Assortment

GOST 1051−73 rental calibrated. General specifications

GOST 1133−71 forged round Steel and square. Assortment

GOST 1497−84 (ISO 6892−84) Metals. Test methods tensile

GOST 1763−68 (ISO 3897−77) Steel. Methods for determining the depth bezoperatsionnogo layer

GOST 2590−2006 bars, steel, hot rolled round. Assortment

GOST 2591−2006 bars, steel, hot-rolled square. Assortment

GOST 2789−73 surface Roughness. Parameters and characteristics

GOST 2879−2006 bars, steel hot rolled hexagon. Assortment

GOST 4405−75 Strip hot-rolled and wrought tool steel. Assortment

GOST 5157−83 hot-rolled sections for different purposes. Assortment

GOST 5639−82 of Steel and alloys. Methods of detection and determination of grain size

GOST 5657−69 Steel. Method for testing the hardenability

GOST 7417−75 calibrated round Steel. Assortment

GOST 7564−97 hire. General rules of sample, blanks collection for mechanical and technological tests

GOST 7565−81 (ISO 377−2-89) Iron, steel and alloys. Sampling method for determination of chemical composition

GOST 7566−94 metal Products. Acceptance, marking, packing, transportation and storage

GOST 8559−75 calibrated square Steel. Assortment

GOST 8560−78 calibrated hexahedronal rolled-stock. Assortment

GOST 8817−82 Metals. Test method for sediment

GOST 9012−59 (ISO 410−82, ISO 6506−81) Metals. Method of measuring hardness Brinell hardness

GOST 9013−59 Metals. Method of measuring Rockwell hardness

GOST 9454−78 Metals. Test method for impact strength at low, room and elevated temperatures

GOST 10243−75 Steel. Test methods and evaluation of the macrostructure

GOST 12349−83 Steel alloyed and high alloy. Methods for determination of tungsten

GOST 12354−81 Steel alloyed and high alloy. Methods for determination of molybdenum

GOST 12359−99 (ISO 4945−77) Steels carbon, alloyed and high alloy. Methods for determination of nitrogen

GOST 12361−2002 Steel alloyed and high alloy. Methods for determination of niobium

GOST 14955−77 quality round Steel with special surface finish. Specifications

GOST 17745−90 of Steel and alloys. Methods for the determination of gases

GOST 18895−97 Steel. Method of photoelectric spectral analysis

GOST 21014−88 ferrous metals. Terms and definitions of defects

GOST 21120−75 Bars and billets round and rectangular section. Methods of ultrasonic flaw detection

GOST 21650−76 means of fastening of package cargoes in transport packages. General requirements

GOST 22235−2010 freight Wagons main Railways of 1520 mm. General requirements for ensuring safety during loading-unloading and shunting works

GOST 22536.0−87 carbon Steel and unalloyed cast iron. General requirements for methods of analysis

GOST 22536.1−88 carbon Steel and unalloyed cast iron. Methods for determination of total carbon and graphite

GOST 22536.2−87 carbon Steel and unalloyed cast iron. Methods of determining sulphur

GOST 22536.3−88 carbon Steel and unalloyed cast iron. Methods for determination of phosphorus

GOST 22536.4−88 carbon Steel and unalloyed cast iron. Methods for determination of silicon

GOST 22536.5−87 (ISO 629−82) carbon Steel and unalloyed cast iron. Methods for determination of manganese

GOST 22536.6−88 carbon Steel and unalloyed cast iron. Methods for determination of arsenic

GOST 22536.7−88 carbon Steel and unalloyed cast iron. Methods for determination of chromium

GOST 22536.8−87 carbon Steel and unalloyed cast iron. Methods for determination of copper

GOST 22536.9−88 carbon Steel and unalloyed cast iron. Methods for determination of Nickel

GOST 22536.10−88 carbon Steel and unalloyed cast iron. Methods for determination of aluminium

GOST 22536.11−87 carbon Steel and unalloyed cast iron. Methods for determination of titanium

GOST 22536.12−88 carbon Steel and unalloyed cast iron. Methods for determination of vanadium

GOST 24597−81 the packaged goods. Basic parameters and dimensions

GOST 26877−2008 metal Products. Methods of measuring form deviations of

GOST 27809−95 Cast iron and steel. Methods for spectrographic analysis

GOST 28033−89 Steel. Method x-ray fluorescence analysis

GOST 30415−96 Steel. Non-destructive testing of mechanical properties and microstructure of steel products by magnetic method

Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.

3 Terms and definitions

In this standard, except for the terms and definitions specified in the referenced standards, the following terms with respective definitions:

3.1 melting, melting, pouring on continuous casting machine: the Volume of steel produced at the same time in the steelmaking unit (open-hearth furnace, basic oxygen furnace or an electric furnace). In the smelting of steel in furnaces of large capacity and release it in two or more buckets, each bucket is considered as an independent melting (melting-ladle).

3.2 steel non-alloy quality: In accordance with [1]*.
________________
* In the Russian Federation can be used by GOST R 54384−2011 (EN 10020:2000) «Steel. Definition and classification of chemical composition and grade of quality."

3.3 non-alloy special steel: In accordance with [1]*.
________________
* In the Russian Federation can be used by GOST R 54384−2011 (EN 10020:2000) «Steel. Definition and classification of chemical composition and grade of quality."

3.4 residual chemical element: a chemical element, not intentionally added, and caught in the melting of charge materials, refractories or air.

3.5 axial looseness: defect macrostructure of products made from continuous cast billets, the description is similar to the term «Pousada rihata» the graveyard 10243.

4 Classification

4.1 the Products are divided as follows:

— types of production:

hot-rolled;

forged;

calibrated;

with special surface finishing;

— classes of quality:

non-alloy quality;

non-alloy special;

— according to the degree of deoxidation on:

KP — from the boiling steel;

PS — from semi-killed steel;

no index in the designation of the brand of quiet steel;

— the length — in accordance with the standards of assortment.

— the quality and surface finish at:

group 1ГП, 2ГП and 3ГП — hot rolled and forged;

group B and C — grooved;

group, G and D — with special surface finish;

— by the presence of secondary treatment oxygen steel:

with secondary treatment (IN);

without secondary treatment (BVI);

— delivery status:

without heat treatment;

thermally treated;

nagaremono — NG (and calibrated with special surface finish).

5 steel grades

5.1 Marks and chemical composition of steel by ladle sample shall be as given in tables 1 and 2.

Table 1 — Chemical composition of steel by ladle sample

The class began	Steel grade	Mass fraction of elements, %
					no more
Non-alloy quality	05kp	Not more than 0.06	Not more than 0.03	Not more than 0.40	0,030	0,035	0,10	0,30	0,30
	08KP	0,05−0,12	Not more than 0.03	0,25−0,50	0,030	0,035	0,10	0,30	0,30
	08ps	0,05−0,11	0,05−0,17	0,35−0,65	0,030	0,035	0,10	0,30	0,30
	08	0,05−0,12	0,17−0,37	0,35−0,65	0,030	0,035	0,10	0,30	0,30
	10kp	0,07−0,14	Not more than 0.07	0,25−0,50	0,030	0,035	0,15	0,30	0,30
	10ps	0,07−0,14	0,05−0,17	0,35−0,65	0,030	0,035	0,15	0,30	0,30
	10	0,07−0,14	0,17−0,37	0,35−0,65	0,030	0,035	0,15	0,30	0,30
	11kp	0,05−0,12	Not more than 0.06	0,30−0,50	0,030	0,035	0,15	0,30	0,20
	15kp	0,12−0,19	Not more than 0.07	0,25−0,50	0,030	0,035	0,25	0,30	0,30
	15ps	0,12−0,19	0,05−0,17	0,35−0,65	0,030	0,035	0,25	0,30	0,30
	15	0,12−0,19	0,17−0,37	0,35−0,65	0,030	0,035	0,25	0,30	0,30
	18kp	0,12−0,20	Not more than 0.06	0,30−0,50	0,030	0,035	0,15	0,30	0,20
	20kp	0,17−0,24	Not more than 0.07	0,25−0,50	0,030	0,035	0,25	0,30	0,30
	20ps	0,17−0,24	0,05−0,17	0,35−0,65	0,030	0,035	0,25	0,30	0,30
	20	0,17−0,24	0,17−0,37	0,35−0,65	0,030	0,035	0,25	0,30	0,30
Non-alloy special	25	0,22−0,30	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	30	0,27−0,35	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	35	0,32−0,40	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	40	0,37−0,45	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	45	0,42−0,50	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	50	0,47−0,55	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	50A	0,47−0,55	0,17−0,37	0,50−0,80	0,025	0,025	0,25	0,30	0,30
	55	0,52−0,60	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	58 (55пп)	0,55−0,63	0,10−0,30	0.20	0,030	0,035	0,15	0,30	0,30
	60	0,57−0,65	0,17−0,37	0,50−0,80	0,030	0,035	0,25	0,30	0,30
	60пп	0,57−0,65	0,10−0,30	0.20	0,035	0,040	0,15	0,30	0,30
	60пп select	0,57−0,61	0,10−0,30	0.20	0,035	0,040	0,15	0,30	0,30

Table 2 — Chemical composition of steel by ladle sample

The class began	Steel grade	Mass fraction of elements, %
					no more
Non-alloy special	15G	0,12−0,19	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	20G	0,17−0,24	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	25G	0,22−0,30	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	30G	0,27−0,35	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	35G	0,32−0,40	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	40G	0,37−0,45	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	45G	0,42−0,50	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	50G	0,48−0,56	0,17−0,37	0,70−1,00	0,030	0,035	0,30	0,30	0,30
	10G2	0,07−0,15	0,17−0,37	1,20−1,60	0,030	0,035	0,30	0,30	0,30
	30G2	0,26−0,35	0,17−0,37	1,40−1,80	0,030	0,035	0,30	0,30	0,30
	35G2	0,31−0,39	0,17−0,37	1,40−1,80	0,030	0,035	0,30	0,30	0,30
	40G2	0,36−0,44	0,17−0,37	1,40−1,80	0,030	0,035	0,30	0,30	0,30
	45G2	0,41−0,49	0,17−0,37	1,40−1,80	0,030	0,035	0,30	0,30	0,30
	50Г2	0,46−0,55	0,17−0,37	1,40−1,80	0,030	0,035	0,30	0,30	0,30

5.1.1 Mass fraction of N must not exceed:

in oxygen steel:

— no secondary treatment (BVI):

0,006% for sheet metal and strips;

0,008% — for other types of steel products.

— secondary treatment (VO) — 0,010%;

in steel produced in electric furnaces — 0,012%.

Method of smelting and processing method of steel, if not agreed when ordering, the manufacturer chooses.

Mass fraction in the steel is not regulated and not monitored, if a mass fraction is not less than 0,020% or acid is at least 0.015% or less are introduced, separately or in any combination, azotowanie elements (not more than 0.04%,  — not more than 0.05%, not more than 0.05%), while the total content of azotowanie (, , , ) of elements should not exceed 0,015%. Mass fraction in steel Sotovaya elements must be specified in the instrument of quality.

5.1.2 In steel grades 35, 40, 45, 50, 55 and 60, intended for the manufacture of patented wire, the mass fraction should be from 0.30% to 0.60%, not more than 0.15%, not more than 0.15%, not more than 0.20%, which should be specified in the order.

5.1.3 steel grades 08ps, 10ps, 15ps and 20ps designed for the manufacture of sheet metal products for cold forming allowed the reduction of the lower limit of the mass fraction of 0.25%.

5.1.4 In steel grade 08ps, intended for the manufacture of steel, allowed a decrease in the mass fraction , and less than the lower limit and the increase in the mass fraction of total to 0.07%.

5.1.5 In all grades of steel allowed a decrease in the mass fraction is below the set lower limit, subject to the application other than , deoxidants simultaneously, separately or in any combination (, , , ) in the required quantities, and subject to the fulfilment of the requirements for mechanical properties in tables 4, 5, and, if agreed in the order, the tables 9, 10, 11 of this standard, or standard for the corresponding products. Mass fraction of other deoxidizers must be specified in the document of quality.

5.1.6 In the quiet steel of all grades in table 1, designed for the manufacture of steel products according to this standard, allowed to decrease the lower limit of the mass fraction of not more than 0.20% under the prerequisite that the requirements to mechanical properties in table 4, and, if agreed in the order, the tables 9, 10, 11 of this standard. Maximum deviations in the metal at the lower limit are not allowed.

In all grades of steel in table 1, which is used for the manufacture of other types of steel products listed in the scope of this standard allowed the reduction of the lower limit of the mass fraction subject to the fulfilment of the requirements for mechanical properties prescribed in the standard for the relevant products.

5.1.7 In a calm steel, made with metal scrap, permitted residual mass fraction and not more than 0.40% each. In the document on quality indicates the actual value of mass fraction and in steel.

5.1.8 In all steel grades specified in table 1, is allowed the mass fraction of not more than 0.08%.

5.1.9 In all steel grades specified in table 2, is allowed the mass fraction of residual elements, not more than  — 0,20%, to 0.15%, and 0.05%, the introduction to 0.03%.

5.2 the steel may be some variance in chemical composition from the rules given in tables 1 and 2, 5.1.1−5.1.5, 7.2.2, 7.2.4, 7.2.7, 7.2.10, 7.2.11, 7.2.17 in accordance with table 3.

Table 3

The name of the element	Limit deviation, %
	±0,01
for quiet steel	±0,02
:
— for steel grades specified in table 2	±0,05
— for steel of other grades	±0,03
	+0,005
	±0,005
(with a mass fraction of up to 0,012%)	+0,002
	±0,02*
	±0,02*
	±0,005*
* Used in the valuation of items in the range. Note — If the supply of steel products from steel of all grades according to the table 1 and 2 without normalization of the lower limit of the mass fraction of carbon, silicon, manganese and sulfur, account for only zero limit deviation.

6 Assortment

6.1 In shape, dimensions and limit deviations, the products must comply with the requirements for:

HR:

— round bars and coils — GOST 2590;

— square bars and coils — GOST 2591, or at such other standard or with other requirements, coordinate when placing the order;

— hex-shaped bars and coils — GOST 2879;

— strip — 103 GOST, GOST 4405;

profiles for oblique washers, GOST 5157;

forged:

— round and square bars — GOST 1133;

— strip — GOST 4405;

calibrated:

— round bars and coils — GOST 7417;

— square bars and coils — GOST 8559;

— hex-shaped bars and coils — GOST 8560;

— strip — normative documentation, agreed when ordering;

— with special surface finish in bars and coils — GOST 14955.

Note — If the supply of steel products in coils allowed in the party no more than 5% of coils, consisting of two segments.

7 Technical requirements

7.1 Characteristics of the underlying execution

7.1.1 steel Products hot rolled round, square and hexagonal, random length in bars and coils, with extreme variance in size (diameter, square side, the diameter of the inscribed circle) for the usual accuracy of rolling (B1), the curvature of the class IV (as delivered in bars) and other requirements for the form — in accordance with GOST 2590, GOST 2591, GOST 2879.

7.1.2 steel Products hot-rolled strip of random length, with maximum deviations in thickness and width to the usual accuracy of rolling (VT1, ВШ1), normal camber (sun), normal flatness (PN) and other requirements for the form — in accordance with GOST 103.

7.1.3 Metal — forged in accordance with the requirements of GOST and GOST 1133 4405.

7.1.4 calibrated round steel Products, non-standard length, with maximum deviations in diameter for qualitativ h9, h10, h11, h12 according to GOST 7417, ovality is not more than the limit deviation for diameter.

7.1.5 steel Products with special surface finish, round, random lengths, extreme deviations in diameter for qualitativ h9, h10, h11, h12 according to GOST 14955, out — of-round not more than half of the limit deviation for diameter.

7.1.6 steel Products hot-rolled, calibrated with special surface finish, in rolls, consisting of one segment.

7.1.7 Profile for oblique washers according to GOST 5157 of steel grades 20 and 35.

7.1.8 steel Products hot rolled and forged groups surface quality: 2ГП or 3ГП.

7.1.9 On the surface of steel products of the group surface quality 2ГП should not be rolled out (unchained) bubbles and dirt, shells, sunsets (zakonov), cracks, katanoi scale and shells from scale.

7.1.9.1 On the surface of metal products are permitted without removal of individual risks, dents and Rabina depth within half of total limit deviation size (diameter, thickness) as well as volosovichi, rolled (wild) bubbles and impurities to a depth not exceeding the sum of limit deviations of size (diameter, thickness), but not more than 0.2 mm, measured from actual size.

7.1.9.2 Unacceptable defects on the surface of metal should be removed with gentle cutting or Stripping, the width of which shall not be less than five times the depth.

Allowed to remove defects by solid grinding.

The depth of Stripping, cutting or machining defects, counting from the actual size of the cross-section must not exceed:

— half of the sum of the limit deviations on size — steel size of less than 80 mm;

— the sum of limit deviations on size — steel size from 80 to 140 mm, inclusive;

— 5% of diameter or thickness for steel products larger than 140 to 200 mm, inclusive;

— 6% of diameter or thickness for steel products larger than 200 mm.

In one section of metal the size (diameter or thickness) less than 140 mm are allowed no more than one maximum Stripping depth, measuring 140 mm or more — not more than two sweeps maximum depth.

7.1.10 On the surface of steel products with surface quality group 3ГП allowed local defects in depth not exceeding the negative limit deviation size (diameter or thickness) for steel products with a size less than 100 mm, total limit deviation size (diameter or thickness) for steel products with size of 100 mm or more.

The depth of defect count from the nominal size.

7.1.11 the ends of the steel products hot rolled and forged needs to be clipped or chopped off. Permitted crumpled ends and burrs, with a maximum height of 2 mm.

Cut end Squareness, mm steel size (diameter, thickness) to 30 mm inclusive is not regulated, in excess of 30 mm should not exceed 0.1 of the diameter or thickness.

Steel up to 40 mm inclusive of random length is allowed to produce neobreznye ends.

7.1.12 the surface Quality and requirements for pruning all grooved metal products must comply with GOST 1051 for groups B and C, with special surface finish GOST 14955 for groups, G and D.

7.1.13 In metal products with special surface finish decarburization is not allowed.

7.1.14 Steel hot rolled and forged supply without heat treatment.

7.1.15 Steel and calibrated with special surface finish put:

— hard — NG;

— heat-treated (annealed, vysokoopasnye, normalized, normalized with the release, hardened with the release).

7.1.16 the hardness of the steel products in delivery condition (TB1) must not exceed:

— hot rolled and forged without heat treatment — HB 255;

— calibrated with special surface finish hard:

of steel grades specified in table 1 to 269 HB;

of steel grade 15G — 207 HB;

the rest of the steel grades specified in table 2 to 269 HB and the actual testing results are not a sign of rejection to 01.01.2016, are recorded in the document about quality.

7.1.17 the Mechanical properties of the metal (Ml*) shall conform to the standards for steel grades:

— 08, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 58 (55пп), 60, 15G, 20G and 10G2, defined on the normalized samples, table 4;

25G, 30G, 35G, 40G, 45G, 50G, 30G2, 35G2, 40G2, 45G2 and 50Г2 determined on heat-treated (quenching and tempering) samples table 5.
________________
* Probably a mistake of the original. Should read «properties of the metal (M1). — Note the manufacturer’s database.

Table 4

Steel grade	Mechanical properties, not less
	Yield strength , N/mm	Tensile strength , N/mm	Elongation , %	The relative narrowing , %
08	196	320	33	60
10	205	330	31	55
15	225	370	27	55
20	245	410	25	55
25	275	450	23	50
30	295	490	21	50
35	315	530	20	45
40	335	570	19	45
45	355	600	16	40
50	375	630	14	40
55	380	650	13	35
58 (55пп)	315	600	12	28
60	400	680	12	35
60пп, 60пп select	355	600	12	30
15G	245	410	26	55
20G	275	450	24	50
10G2	245	420	22	50
Note — By agreement between manufacturer and customer for steel products of steel grades 25, 30, 35, 40, 45, 50, 55, 58 (55пп), 60 may reduce strength by 20 N/mm, in comparison with the standards specified in the table, while raising the rate of elongation of 2% (abs).

Table 5

Steel grade	Mechanical properties, not less
	Yield strength , N/mm	Tensile strength , N/mm	Elongation , %	The relative narrowing , %
25G	295	490	22	50
30G	315	540	20	45
35G	335	560	18	45
40G	355	590	17	45
45G	375	620	15	40
50G	390	650	13	40
30G2	345	590	15	45
35G2	365	620	13	40
40G2	380	660	12	40
45G2	400	690	11	40
50Г2	420	740	11	35

7.1.17.1 For steel products of diameter or thickness over 80 to 180 mm incl. permitted reduction in relative elongation of 2% (abs.) and the relative contraction by 5% (abs.), for steel products of diameter or thickness St 180 mm — a reduction of relative elongation of 3% (abs.) and the relative contraction by 10% (abs.).

7.1.17.2 in the control of mechanical properties on forge (paracetanol) sample size cross section from 90 to 100 mm standards mechanical properties shall conform to the standards specified in tables 4, 5, respectively.

7.1.18 the Macrostructure of steel products produced from ingots, should not have residues shrinkage, podnasadochnogo of rychlosti, blistering, delamination, cracks, crusts, foreign metal and slag inclusions and placenow.

Macrostructure of steel produced from slab, should not have axial rychlosti, cracks, crusts, delamination, foreign metal and slag inclusions and placenow.

Other defects of a macrostructure of a classified GOST 10243, are not standardized and not controlled.

Note — Additional requirements to the macrostructure and the conditions for its control, and the need to control the macrostructure of rolled steel of thickness or diameter less than 40 mm can be laid down when ordering.

7.2 Requirements of steel products, established by agreement between manufacturer and customer

Requirements in order to indicate by reference to the relevant items (for example: «7.2.8») or given in the legend.

7.2.1 steel Products of steel grades according to table 1 and 2 without normalization of the lower limit of the mass fraction , and , provided the requirements to mechanical properties in tables 4, 5, and 11 of this standard.

7.2.2 steel Products from steel with a narrowed compared are shown in table 1, the limits on the mass fraction in the feeding trial, but not less than 0.05%.

7.2.3 steel Products from steel with a narrowed compared are shown in table 1, the limits on the mass fraction in the feeding trial, but not less than 0.05%, excluding extreme deviations in the steel products listed in table 3.

7.2.4 steel Products from steel with a narrowed compared are shown in table 1, the limits on the mass fraction in the feeding trial, but not less than 0.10%.

7.2.5 steel Products of steel grades 15G, 20G, 25G, 30G, 35G, 40G, 45G, 50G, 30G2, 35G2, 40G2, 45G2 and 50Г2 with a decrease in the lower limit of the mass fractions in ladle sample is not more than 0.20% under the prerequisite that the requirements to mechanical properties in tables 4, 5, and 11 of this standard. Maximum deviations in the metal at the lower limit are not allowed.

7.2.6 Metal from the calm of steel with a mass fraction for feeding the sample from 0.17% to 0.27%.

7.2.7 Products of steel with a mass fraction for feeding the sample from 0.020% to 0.040%.

7.2.8 metal Products of steel grades 15, 20, 25, 30, 35, 40, 45, 50, 15G, 20G, 25G, 30G, 35G, 40G, 45G, 50G, 10G2, 30G2, 35G2, 40G2, 45G2 and 50Г2 with a mass fraction and feeding at the sample of less than 0.015% of each.

7.2.9 metal Products of steel grades 15, 20, 25, 30, 35, 40, 45, 50, 15G, 20G, 25G, 30G, 35G, 40G, 45G, 50G, 10G2, 30G2, 35G2, 40G2, 45G2 and 50Г2 with a mass fraction and for feeding the sample of 0.025% of each.

7.2.10 metal Products from steel of all grades, except 05kp, 08KP, 08ps, 08, with a mass fractionfor feeding the sample from 0.10% to 0.25%.

7.2.11 steel Products of steel with a mass fraction for feeding the sample from 0.10% to 0.25%.

7.2.12 steel Products from quiet steel, manufactured with the use of scrap metal, with a mass fraction of residual in the bucket the sample is not more than 0.30%.

7.2.13 metal Products from steel of all grades, except 11kp and 18kp, with a mass fraction for feeding the sample not more than 0.25%.

7.2.14 steel Products of steel with a mass fraction , , in the bucket the sample is not more than 0.15% each.

7.2.15 steel Products from oxygen-Converter steel ladle treatment, in addition to steel sheet metal, with a mass fraction for feeding the sample not more than 0.009% with maximum deviations of metal +0,001%.

7.2.16 Mass fraction in the bucket the sample is not more than 0,008% in the oxygen Converter steel ladle treatment intended for the manufacture of sheet metal products.

7.2.17 the Products of a calm and balanced steel of all grades with a mass fraction of the total for feeding the sample from 0.020% to 0.050%.

7.2.18 steel Products with a guarantee of weldability (HS).

Weldability is ensured by chemical composition, carbon equivalent and manufacturing technology. The value of the carbon equivalent formula and its definition agreed in the order.

7.2.19 Metal length:

— hot rolled and forged:

dimensional (MD);

measuring with non-standard length (MD1);

multiple dimensional (KD);

dimensional with random length (КД1);

limited within off-gage length (AR);

with limited off-gage length (EA1).

When the supply of steel products length MD1, КД1, EA1 is allowed in steel products of random length not more than 5% of the batch weight:

— calibrated in accordance with the requirements of the standards for grades specified in 6.1;

— special surface finish — in accordance with the requirements of GOST 14955.

7.2.20 the calibrated round Steel random length (ND) with out — of-round not more than half of the limit deviation for diameter.

7.2.21 steel Products hot-rolled:

— round — high (A1) and high (B1) — precision rolling;

— square — increased (B1).

7.2.22 steel Products hot-rolled, calibrated and with special surface finish, in rolls, consisting of two segments.

7.2.23 steel Products hot rolled and forged with quality surface groups 1ГП without rolled (unchained) bubbles and contamination, wooloowin.

Defects on the surface should be removed with gentle cutting or Stripping, the width of which shall not be less than five times the depth.

Allowed to remove defects by solid grinding.

The depth of Stripping, cutting or grinding of steel defects shall not exceed the limits specified in 7.1.9.2.

On the surface of metal products are permitted without the removal of some small risks, dents and Rabina within half the sum of the limit deviations on size (diameter, thickness).

7.2.24 steel Products hot rolled and forged with quality surface groups 1ГП test on a hot draught of 65% (65).

In upset samples should be free of cracks and breaks.

7.2.25 steel Products are hot rolled with a normalized length of the shear is not more than 70 mm.

7.2.26 steel Products hot rolled and forged with deburring with one hand without crushing the ends (УЗ1) or deburring both sides without crumpling all (UZ2). Deburring is allowed chamfering. The chamfer size is not regulated.

7.2.27 steel Products hot rolled and forged, without Burr and crumpled ends (УЗ3), while «Cup» or remnants of «cups» on steel products are not rejection symptom. The form of «cups» and the remnants of the «cups» are given in Appendix A.

7.2.28 Metal, with chamfering on one end of the rod (F1) or two ends (F2). The amount of chamfer not reglamentary.

7.2.29 steel Products of steel grades 35, 40, 45, 50, 55, 58 (55пп), 60, 50G, 10G2, 30G2, 35G2, 40G2, 45G2 and 50Г2, designed for parts subjected to surface hardening by high frequency currents, with the magnitude bezoperatsionnogo layer (ferrite + transition zone) is not more than:

— 1.5% of the diameter or the thickness on the side (1C);

— 0,5% of the diameter or the thickness on the side (2C).

7.2.30 steel Products of steel with a mass fraction of 0.30% or more at the lower limit in the mark regulated value bezoperatsionnogo layer (ferrite + transition zone) — not more than 1.0% of the diameter or thickness of the side (3C).

7.2.31 steel Products hot-rolled and forged heat-treated (annealed, vysokoopasnye, normalized, normalized with the release).

7.2.32 the Products with the specific form of heat treatment, specified in the order:

— annealed — FROM;

— vysokoopasnye — IN;

— normalized — N;

— normalized vacation — BUT;

— hardened leave — ZO.

7.2.33 steel Products hot rolled and forged etched in (T) condition.

7.2.34 steel Products with standardized hardness in the delivery condition (TV2) in accordance with the requirements specified in tables 6 and 7.

Table 6

Steel grade	Hardness HB, no more for steel products
	hot rolled and forged		and calibrated with special surface finish
	without heat treatment	after annealing or high holidays	hard	after annealing or high holidays
08	131	-	179	131
10	143	-	187	143
15	149	-	197	149
20	163	-	207	163
25	170	-	217	170
30	179	-	229	179
35	207	-	229	187
40	217	187	241	197
45	229	197	241	207
50	241	207	255	217
55	255	217	269	229
58 (55пп)	255	217	+	+
60	255	229	269	229
Notes 1 the Sign «-" means that the hardness is not normalized and not in control. 2 the Sign «+" means that the hardness testing is carried out for a set of statistical data, inspection results are entered into the document of quality.

Table 7

Steel grade	Hardness HB, no more for steel products
	hot rolled and forged		and calibrated with special surface finish after annealing or high holidays
	after normalization, followed by high holiday	after annealing or high holidays
15G	179	163	179
20G	197	179	197
25G	207	197	207
30G	207	197	207
35G	217	207	217
40G	217	207	217
45G	241	229	241
50G	241	229	241
10G2	207	197	207
30G2	217	207	217
35G2	217	207	217
40G2	229	217	229
45G2	241	229	241
50Г2	241	229	241
Note — By agreement between manufacturer and customer is allowed to produce steel without annealing or high holiday with a hardness corresponding standards specified in the table.

7.2.35 Metal and calibrated with special surface finish nagarebana with hardness, increased to 15 HB compared in table 6 (TVZ).

7.2.36 Metal and calibrated with special surface finish from steel of all grades in tables 6 and 7 with a normalized hardness normalized with release and quenched with the release conditions (TV5). Hardness norms agreed in the order.

7.2.37 steel Products hot rolled and forged of steel grades in tables 6 and 7 with a normalized hardness in the normalized condition (TB6). Hardness norms agreed in the order.

7.2.38 steel Products from steel grades 45, 50, 50A with a normalized hardness (ТВ4), determined on quenched samples in accordance with the requirements specified in table 8.

Table 8

Steel grade	Hardness for tempered specimens HRC, not less
45	46
50, 50A	51

7.2.39 calibrated steel Products cold-worked or thermally treated (annealed or vysokoopasnye) condition from the normalized mechanical properties (M2) in accordance with the requirements specified in table 9.

Table 9

Steel grade	Mechanical properties for steel products
	hard			annealed or vysokoopasnye
	Temporary resistance tion , N/mm	Take tional elongation , %	Take tional contraction , %	Temporary resistance tion , N/mm	Take tional elongation , %	Take tional contraction , %
10	410	8	50	290	26	55
15	440	8	45	340	23	55
20	490	7	40	390	21	50
25	540	7	40	410	19	50
30	560	7	35	440	17	45
35	590	6	35	470	15	45
40	610	6	35	510	14	40
45	640	6	30	540	13	40
50	660	6	30	560	12	40

7.2.40 the calibrated Steel from steel grades 08, 55 and 60 cold-worked or heat-treated condition, mechanical properties control (M3). Norms of mechanical properties confirm the order.

7.2.41 Metal with mechanical properties of steel grades in tables 4, 5 and 9 without standardization of relative narrowing (M4).

7.2.42 the Products of the normalized mechanical properties (M5), determined on samples cut from heat-treated (quenching and tempering) of the workpieces in accordance with the requirements specified in table 10. The size of the workpiece for heat treatment, stipulate the order.

Table 10

Steel grade	Mechanical properties of metal products size
	to 16 mm, incl.				St. 16 up to 40 mm incl.				over 40 up to 100 mm incl.
	Limit current honor , N/mm, not less	Times ing company of tavlenie, N/mm	Take tional outline- tion , %	The work of blow , j	Limit current honor , N/mm, not less	Times ing company of tavlenie, N/mm	Take tional outline- tion , %	The work of blow , j	Limit current honor , N/mm, not less	Times ing company of tavlenie, N/mm	Take tional outline- tion , %	The work of blow , j
			not less than				not less than				not less than
25	375	550−700	19	35	315	500−650	21	35	+	+	+	+
30	400	600−750	18	30	Three hundred fifty five	550−700	20	30	295	500−650	21	30
35	430	630−780	17	25	380	600−750	19	25	315	550−700	20	25
40	460	650−800	16	20	400	630−780	18	20	355	600−750	19	20
45	490	700−850	14	15	430	650−800	16	15	375	630−780	17	15
50	520	750−900	13	+	460	700−850	15	+	400	650−800	16	+
55	550	800−950	12	+	490	750−900	14	+	420	700−850	15	+
60	580	850−1000	11	+	520	800−950	13	+	450	750−900	14	+
Notes 1 the «+" Sign means that the test is performed for statistical purposes, the test results are entered into the document of quality. 2 Mechanical properties of steel products of steel grade 30 apply to the products size up to 63 mm incl. 3 Values of mechanical properties given for steel products of circular cross-section. For rectangular sections, the ranges of equivalent diameters in accordance with Annex B.

7.2.43 steel Products of steel grades 25, 30, 35, 40, 45, 50, 25G, 30G, 35G, 40G, 45G, 50G with a normalized impact strength (КУВ1), determined on the thermally treated samples (quenching and tempering). Standards of impact strength given in table 11.

Table 11

Steel grade	Impact strength , j/cm, not less
25, 25G	88
30, 30G	78
35, 35G	69
40, 40G	59
45, 45G	49
50, 50G	39

7.2.44 steel Products with standardized impact toughness when the test temperature minus 40 °C (КУВ2). The grade of steel, the norms of toughness and sample requirements agreed in the order.

7.2.45 steel Products with standardized impact toughness when the test temperature (20±10) °C, -20 °C, -40 °C, -70 °C (КУВ3). Steel grade, test temperature, norms of toughness and sample requirements agreed in the order.

7.2.46 the Products of the normalized scores in the macrostructure

7.2.46.1 steel Products produced from ingots (КМС1), in accordance with the requirements specified in table 12.

Table 12

Macrostructure of steel in points, not more
Penny General paint- toast	Tochic- Naya heterogene- rod- ness	Liqua- Zion- NY square	Overall, patnis- th liqua- ciya	Regional patnis- th liqua- ciya	Pousada liquation of metal to size		Podcar- Cowie bubbles	Mikri- was- litna tre the community
					70 mm incl.	over 70 mm
3	3	3	2	1	1	2	Not allowed
Note — For steel products with a size of 70 mm with surface quality group 3ГП subcortical bubbles allowed 2 points to a maximum depth of total limit deviation for diameter or thickness.

7.2.46.2 steel Products made from slab (КМС2), in accordance with the requirements specified in table 13.

Table 13

The size of the metal products, mm	Macrostructure of steel in points, not more
	Central porosity	Pousada (axial) liquation	Segregated strips and cracks	The regional dot pollution	Light bar (contour)
From 40 to 70 incl.	2	2	1	1	2
SV. 70 «180 «	3	3	1	1	2

7.2.47 Metal with ultrasonic inspection (UT) of internal defects according to GOST 21120. The quality group agreed in the order.

7.2.48 steel Products with a guarantee of norms of contamination of steel by foloowing determined by the consumer on finished parts. Contamination of the steel should not exceed the limits specified in table 14.

Table 14

The total area controlled surface details, see		The number of valid wooloowin	The maximum length of wooloowin, mm	The total length of wooloowin, mm
	To 50 incl.	5	6	10
over 50 «100 «		6	7	10
«100» 200 «		8	8	20
«200» 300 «		10	9	30
«300» 400 «		11	10	40
«400» 600 «		12	12	60
«600» 800 «		13	14	80
«800» 1000 «		15	15	100
Notes 1 For every subsequent 200 cmcontrolled surface finished parts, the area of which exceeds 1000 cm, additionally allowed no more than one volosovichi length, not more than specified for the area of 1000 cm, with a corresponding increase in the total length of wooloowin. 2 parts with a surface area of more than 200 cmshall be allowed on the portions of the surface area of 10 cmnot more than five wooloowin.

7.2.49 steel Products are subjected to cleaning with a fraction of oxides (TO).

7.2.50 steel Products hot rolled and forged with a machined surface (MBT), without regulation of surface roughness.

7.2.51 the Products of the normalized grain size in the steel:

— austenitic:

no bigger than 5 rooms (НЗ1);

within the numbers from 5 to 8 (НЗ2);

— the real one — not larger than 5 rooms (НЗ3).

7.2.52 steel Products with a normalized hardenability:

— of steel grades 35, 40 and 45 (WP1) — in accordance with Annex V. the Values of hardness measurements in a full band or at specified points indicated in the order;

— of steel grades 60пп, 60пп select, 50G, 30G2, 35G2, 40G2, 45G2 and 50Г2 (WP2). Hardness values for full band or in a specified point agreed in the order.

7.2.53 the Products with regulation of pollution steel non-metallic inclusions. Standards and evaluation method — according to GOST 1778, [2], [3] or agreed in the order.

7.2.54 the Products of low-tonnage batches.

A lot of the party agree on the order.

7.3 Scheme and symbols are examples of steel — in accordance with Annex G.

8 Rules of acceptance

8.1 the Products are taken by parties consisting of steel of the same brand, one melting (melting-ladle), one size on the cross section and one mode of heat treatment (in manufacturing in heat-treated state).

By agreement between manufacturer and customer is the party formed from steel of the same brand multiple heats of the same size in cross section.

8.1.1 Each party is accompanied by a quality document, designed according to GOST 7566. In the document, as an extra point:

— the method of steel production;

— the presence or absence of secondary metallurgy for BOF steel;

— when ordering steel products intended for the manufacture of patented wire (5.1.2), sheet metal products for cold forming (5.1.3), tin (5.1.4) — metal products;

— for steel products, taken with the requirements in accordance with 7.2, additionally indicate the results of the tests on ordered indices.

8.2 For quality assurance from the party of steel products taken:

— for chemical analysis — samples according to GOST 7565*. Control of residual elements: , , , , , , the manufacturer conducts periodic at least once per quarter. Control of residual elements in steel produced with the use of scrap metal, mass fraction and determine for each cast;
________________
* In the Russian Federation can be used by GOST R ISO 14284−2009 «Steel and cast iron. Selection and preparation of samples for the determination of chemical composition».


to control the surface quality all bars, strips and coils;

— for quality control of dimensions and form deviations of — 10% rods, strips and coils, but not less than 5 pieces;

— to test the residue three rod, strip or coil;

— to control the hardness in the delivery state with 2% of bars, strips, or coils, but not less than 3 pieces;

— to control the hardness for tempered specimens — two rods, two strips, or two rolls from the bottoms (bottoms of bucket);

for tensile tests — one rod, one strip or one skein for verification in the normalized condition, two rods, two strips, or two rolls — for cold-worked, annealed, or quenched vysokoopasnye with the release condition;

for testing the impact strength is two bars, two bands, or two rolls;

— to control the macrostructure and determine the depth bezoperatsionnogo layer — two rods, two strips, or two rolls;

— for determining the size of austenitic grain, and a valid one rod, one strip or one skein from melting (melting-bucket);

— to determine hardenability is one rod, one strip or one skein from melting (melting-bucket);

— to determine the contamination of steel non-metallic inclusions — six rods, strips or coils from melting (melting of the bucket).

8.2.1 Upon delivery of the steel parties, formed from several heats of steel, selection control units for quality control is carried out in an amount, specified above, from each heat.

8.3 in case of unsatisfactory test results of at least one indicator in the sampling inspection it is carried out re-tests on twice the number of samples taken from units of metal products, of not being tested.

8.3.1 Upon receipt of a satisfactory results when re-testing all the unit included in the party think fit, with the exception of units that does not pass initial testing.

8.3.2 Upon receipt of unsatisfactory results with repeated testing allowed the manufacturer to conduct continuous monitoring for indicators with sampling procedures in which these tests are not aged or subjected to steel re-heat treatment (if carried out).

8.3.3 Upon receipt of unsatisfactory results of analysis of ladle samples the chemical composition of steel can be certificated for the analysis of finished products. In the document as indicated by the results of the two tests.

9 test Methods

9.1 Chemical analysis were carried out according to GOST 12349, 12354 series GOST, GOST 12359, 12361 GOST, GOST 17745**, GOST 18895*, GOST 22536.0 to GOST 22536.12, GOST 27809, ГОСТ 28033 or other methods providing the required accuracy of measurement and certified in the prescribed manner.
________________
* In the Russian Federation can be used by GOST R ISO 14284−2009 «Steel and cast iron. Selection and preparation of samples for the determination of chemical composition».

** In the Russian Federation can be used by GOST R 54153−2010 «Steel. Method of atomic-emission spectral analysis» and GOST R ISO 4943−2010 «Steel and cast iron. Determination of the copper content. Spectrometric method of atomic absorption in flame».


The differences in the evaluation of the chemical composition monitoring is carried out by chemical analysis according to the standards listed above.

9.2 surface Quality check inspection of metal products without the use of magnifying devices. If necessary, carry out the bleaching or etching of the surface. For steel products with special surface finish diameter up to 3 mm inclusive inspection is carried out at magnifications up to 10. The depth of the defects on the surface of metal to determine the reference sweep or zapilovku file.

9.2.1 carrying out automated inspection of surface quality of steel with a depth of detection of defects of 0.3 mm or more, for steel products with surface quality 2ГП and 3ГП and 0.2 mm — for steel surface quality 1ГП. The method of control chosen by the manufacturer.

9.3 control the size of metal products is carried out standardized means of measurement and means of admittance control.

9.3.1 Methods of measurement of geometric tolerances in accordance with GOST 26877.

9.4 Sampling from coils for all types of tests carried out at a distance of not less than 1.5 a coil from the end of roll.

9.5 each selected for control rod, strip or coil taken:

for tensile tests, and sediment to determine the austenitic grain size, valid for grain, hardenability depth bezoperatsionnogo layer, control of the hardness, control of pollution steel non-metallic inclusions — one sample;

for testing the impact strength — one sample for the respective test conditions;

— to control the macrostructure is one templet.

9.6 Sampling for tests on sediment — GOST 7564.

9.7 taking samples for testing of mechanical properties in tables 4, 5 and 9 carry out the churchyard 7564 (version 1), table 10 and 11 according to GOST 7564 (version 2).

9.7.1 Samples for control of the mechanical properties selected from metal in the as-delivered profile.

Allowed for steel products with a diameter (thickness) of more than 180 mm are supplied without heat treatment, annealed or vysokoopasnye condition samples to turn (roll) the cross section diameter (thickness) of from 90 to 100 mm.

The option of sampling (from a supplied profile or reforged (paracetanol) samples for steel products with a diameter (thickness) of more than 180 mm are supplied without heat treatment, annealed or vysokoopasnye condition, defined by the manufacturer.

9.8 Selection of longitudinal samples to control the hardness after quenching is carried out according to the scheme in accordance with Annex D.

Samples for making samples can be cut from steel in the delivery state or blank.

The recommended mode of hardening of the samples is given in Appendix E.

9.9 Test for sediment in the hot state is carried out according to GOST 8817.

Samples for test are heated to the temperature of metal:

— of steel grades 15G, 20G, 25G, 30G, 35G, 45G, 50G, 10G2, 30G2, 35G2, 40G2, 45G2, 50Г2 from 1150 °C to 1250 °C;

— other grades of steel — from 850 °C to 1000 °C.

The heating temperature of the samples is indicated in the document about quality.

The samples precipitated at 65% relative to its initial height. In upset samples should not be opened cracks and sunsets.

Test hot upset metal is larger than 80 mm, the manufacturer might not have provided a guarantee tests at the customer.

9.10 Brinell Hardness number is determined according to GOST 9012. The hardness of steel products of diameter or thickness less than 5 mm is determined.

9.11 Rockwell Hardness determined according to GOST 9013 on the site, located in the middle of the length of the sample. The surface of the pad to measure hardness is subjected to Stripping, the surface roughness should be not more than 1.25 µm according to GOST 2789.

9.12 the tensile Test is carried out according to GOST 1497 on samples of five times the longitudinal length with a diameter of 5 or 10 mm. In those cases when the tensile test on metal not detected by the plot of yield stress and it is impossible to determine the yield strength , is permitted to determine yield strength . The actual values of the yield strength must meet the standards for yield strength .

For steel products with a diameter (thickness) up to 25 mm inclusive test may be performed in situ samples (without machining).

9.12.1 For steel products that are supplied without heat treatment or heat treated (also normalized), the tensile test in accordance with the requirements of table 4 is carried out on the samples made of normalized billets with a diameter (thickness) of 20 to 25 mm, for steel products with a diameter (thickness) of less than 25 mm on the samples made of normalized samples of the supplied profile.

Recommended mode normalization blanks are given in Appendix J.

For steel products supplied in the normalized condition tensile test is carried out on the samples taken from the steel products in delivery condition.

In coordination with the customer of the tensile tests for normalized steel products with a diameter (thickness) of 180 mm or more may be performed on samples cut from billets with a diameter (thickness) of 20 to 25 mm, selected from the supplied profile to carry out the heat treatment and subjected to the normalization simultaneously with the products.

9.12.2 tensile Test in accordance with the requirements of table 5 is performed on the samples made from heat-treated (quenching and tempering) billet diameter (thickness) of 20 to 25 mm, for steel products with a diameter (thickness) of less than 25 mm on the samples made from heat-treated (quenching and tempering) of samples supplied profile.

The recommended mode of hardening with the release of the blanks is given in Appendix J.

9.12.3 tensile Test in accordance with the requirements of table 10 is performed on the samples made from heat-treated (quenching and tempering) billet specified in the order size. The recommended mode of hardening with the release of the billets are given in Appendix I.

9.13 Test for impact strength is carried out according to GOST 9454 on samples of type 1, 2 or 3 (,) or type 11, 12 or 13 made from heat-treated billets of size 25 mm size supply profile for steel products with a diameter (thickness) of less than 25 mm.

The direction of the axis of the sample along the direction of rolling.

The recommended heat treatment of workpieces is provided in appendices F and I.

9.14 Macrostructure controlled visually in accordance with GOST 10243 on the etched templeto or fracture.

Assessment of the quality of the macrostructure of metal is carried out:

— made of ingot — GOST 10243;

— made of continuous cast billet in the part defects:

Central porosity and pousadela (axial) segregation — according to GOST 10243 or normative documentation coordinated in the established procedure;

segregated strips and cracks, the boundary point pollution, light bar (loop) — according to the normative documentation coordinated in the established procedure.

It is allowed to apply the methods of ultrasonic inspection (UT) and other non-destructive methods of control, agreed in the prescribed manner.

Allowed no placenow not control, and to ensure manufacturing technology.

Notes

1 Quality of the macrostructure of steel with a diameter of less than 40 mm, produced from slab can be guaranteed without an inspection.

2 According to agreement between manufacturer and customer the quality of the macrostructure of metal is permitted to guarantee, subject to the satisfactory results of the control of the macrostructure at the stage of pouring.

9.15 Depth bezoperatsionnogo layer is determined according to GOST 1763, method M

9.16 Hardenability is determined by the method of mechanical hardening according to GOST 5657.

You can define the hardenability of the method of volumetric hardening according to the agreed procedure or use the calculation method of hardenability according to [4].

9.17 the Size of austenitic grains is determined according to GOST 5639 for steel products of steel with a mass fraction of 0.25% — cementation method or a method of oxidation for steel products of steel with a mass fraction of more than 0.25 percent — by the method of oxidation. The size of the actual grain is determined according to GOST 5639 by etching.

9.18 air pollution Control became volosovichi carried out on the finished parts at the consumer methods in accordance with the normative documentation coordinated in the established procedure.

9.19 Pollution steel non-metallic inclusions is determined according to GOST 1778, [2] or [3].

9.20 For steel products have become one of the trunks held the control of mechanical properties, macrostructure, hardenability of pollution steel non-metallic inclusions and grain size profiles for large metal products, the manufacture of smaller profiles of these tests allowed not to perform. The document about quality in this case indicates: «complies with GOST 1050».

9.21 If you are using statistical and other non-destructive methods of control of mechanical properties according to GOST 30415* or other normative documentation coordinated in the established procedure, the control of mechanical properties the manufacturer is allowed not to perform.
________________
* In the Russian Federation can be used by GOST R 50779.10−2000 (ISO 3534−1-93) «Statistical methods. Probability and fundamentals of statistics. Terms and definitions» and GOST R 50779.11−2000 (ISO 3534−2-93) «Statistical methods. Statistical quality control. Terms and definitions».


The manufacturer guarantees the conformity of the manufactured metal products with the requirements of this standard. The differences in quality assessment and periodic quality inspections of steel products used control methods stipulated by this standard.

10 Marking, packaging, transportation and storage

10.1 Labeling, packaging, transportation and storage of steel products — according to GOST 7566 with the following additions.

10.1.1 Transportation of steel products is carried out by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species. By rail the transportation is carried out depending on the weight and dimensions of steel in covered or open wagons in accordance with GOST 22235.

Weight of cargo must not exceed when mechanized loading into open vehicles 10,000 kg, in indoor of the vehicle is 1250 kg.

10.1.2 When sending two or more parcels, the dimensions of which allow you to arrange transport package with dimensions according to GOST 24597, the package needs to be formed into transport packets. Fastening means — according to GOST 21650.

10.1.3 Marking, packaging, transportation and storage of the calibrated metal products — according to GOST 1051, metal with special surface finish — GOST 14955.

10.1.4 On coils, consisting of two segments, hang a distinctive label with the inscription: «coil broken».

By agreement with the client with the consumer a different way of marking.

10.2 it is allowed to mark directly on metal regardless of whether it is supplied Packed or not.

11 safety Requirements and environmental protection

11.1 metal Products fire and explosion proof, non-toxic and requires no special measures during transportation, storage and processing.

The implementation of special measures for the protection of the environment is not required.

12 manufacturer’s Warranty

12.1 the Manufacturer guarantees the compliance of products with requirements of this standard under the conditions of transportation and storage.

Annex a (mandatory). Requirements for all steel products hot rolled and forged when you remove the burrs and crushed all

Appendix A
(required)

A. 1 Terms and definitions

A. 1.1 «Cup» (figure A. 1): the Defect at the end of the reign of steel products in the form of cups generated in the edit due to shear deformation, and also due to the rolling of the Burr (see the definition in GOST 21014) generated when cutting metal, depending on the thickness (diameter) of metal can result in the surface layer or until center of metal products.

Figure A. 1

A. 1.2 the remains of «cups» (figure A. 2, A. 3): a Defect on the end face of the metal remaining after removal of a facet or trimming the main part of the «calyx».

Figure A. 2

Figure A. 3

Appendix B (mandatory). Convert the rectangular cross sections into a round with the same mechanical properties

Appendix B
(required)

Figure B. 1

Annex b (mandatory). Settings fine bands (the limits of fluctuations of hardness HRC and HRB along the length of the face sample)

The App
(required)

Table B. 1

Distance from end, mm	Hardness for bands of hardenability steel grades
	35		40		45
	max.	min.	max.	min.	max.	min.
1,5	57,0 HRC	49,5 HRC	58,0 HRC	50,5 HRC	59,0 HRC	50,5 HRC
3,0	55,0 HRC	44,0 HRC	57,0 HRC	Of 45.5 HRC	57,0 HRC	Of 45.5 HRC
4,5	49,0 HRC	27,0 HRC	52,5 HRC	29,0 HRC	54,0 HRC	29,0 HRC
6,0	38,0 HRC	23,0 HRC	37,5 HRC	26,0 HRC	42,5 HRC	26,0 HRC
7,5	31,0 HRC	20,0 HRC	33,5 HRC	24,0 HRC	36,5 HRC	24,0 HRC
9,0	30,0 HRC	94,0 HRB	32,0 HRC	22,0 HRC	33,0 HRC	22,0 HRC
10,5	29,0 HRC	93,0 HRB	30,0 HRC	20,0 HRC	Of 32.5 HRC	21,0 HRC
12,0	28,0 HRC	92,0 HRB	29,0 HRC	94,0 HRB	31,0 HRC	20,0 HRC
13,5	27,5 HRC	91,0 HRB	28,0 HRC	93,0 HRB	30,0 HRC	94,0 HRB
15,0	27,0 HRC	90,0 HRB	27,5 HRC	92,0 HRB	Of 29.5 HRC	93,0 HRB
16,5	26,5 HRC	89,0 HRB	27,0 HRC	91,0 HRB	29,0 HRC	92,0 HRB
18,0	26,0 HRC	88,0 HRB	26,5 HRC	89,0 HRB	Of 28.5 HRC	91,0 HRB
19,5	25,5 HRC	87,0 HRB	26,0 HRC	88,0 HRB	28,0 HRC	90,0 HRB
21,0	25,0 HRC	86,0 HRB	25,5 HRC	87,0 HRB	27,0 HRC	89,0 HRB
24,0	24,0 HRC	85,0 HRB	25,0 HRC	86,0 HRB	26,0 HRC	88,0 HRB
27,0	23,0 HRC	84,0 HRB	24,0 HRC	85,0 HRB	25,0 HRC	87,0 HRB
30,0	22,0 HRC	83,0 HRB	23,0 HRC	84,0 HRB	24,0 HRC	86,0 HRB
33,0	+	+	22,5 HRC	83,0 HRB	+	+
36,0	+	+	22,0 HRC	82,0 HRB	+	+
Note — the «+" Sign means that the hardness testing is carried out for a set of statistical data, inspection results are entered into the document of quality.

Appendix d (mandatory). Scheme and examples of symbols

Appendix D
(required)

Examples of symbols:

The hot rolled bars, round, normal accuracy of rolling (B1), class II on curvature of random length (ND), with a diameter of 100 mm according to GOST 2590−2006, of steel grade 30, with a mass fraction of sulfur is from 0.020% to 0.040%, with surface quality group 2ГП, with mechanical properties (M1), with hardness (TV1), toughness (КУВ1), deburring (УЗ1), without heat treatment:

The hot rolled round, the usual accuracy of rolling (B1), class II on curvature of random length in rolls (NMD), with a diameter of 12 mm according to GOST 2590−2006, of steel grade 40, with surface quality group 2ГП, with mechanical properties (M1), with hardness (TB1), without heat treatment, patented wire (subject to 5.1.2):

The hot rolled bars-round, peeled (MBT), the usual accuracy of rolling (B1), class II on curvature of random length (ND), diameter 60 mm according to GOST 2590−2006, of steel grade 30, with surface quality group 2ГП, with mechanical properties (M1), with hardness (TV1), toughness (КУВ1), deburring (UZ2), without heat treatment:

The hot rolled bars, square, high precision rolling (B1), class I curvature, length (MD) 4000 mm, from a side of a square of 25 mm according to GOST 2591−2006, of steel grade 35, with surface quality group 1ГП, with mechanical properties (M5) hardness (TV2), with a normalized score in the macrostructure (КМС1), decarburization (1C), thermally treated (THAT):

The hot rolled strip, General purpose (HE), the normal precision of rolling thickness (VT1) and width (ВШ1), normal camber (sun), normal flatness (PN) random length (ND) with a thickness of 36 mm, width 90 mm according to GOST 103−2006, steel grade 45, with surface quality group 3ГП, with mechanical properties (M1), with hardness (TV1), with a normalized hardenability (PR1), without heat treatment:

Forged bar, round, random length (ND), with a diameter of 80 mm GOST 1133−71, of steel grade 40, with 2ГП surface quality, mechanical properties (M1), with hardness (TB1), without heat treatment:

The hot rolled profile for oblique washers, standard length (MD) 4000 mm, with dimensions of 325,84 mm according to GOST 5157−83, of steel grade 35, with surface quality group 3ГП, with mechanical properties (M1), with hardness (TB1), without heat treatment:

Calibrated rolled in bars, round, with tolerance field h11, length (MD) of 5000 mm in diameter 10 mm according to GOST 7417−75, steel grade 45, with surface quality group according to GOST 1051−73 with mechanical properties (M2), hardness (TVZ), decarburization (2S), full hard (NG):

Rolled calibrated in bars and square, with a tolerance field h11, long, multiple dimensional (KD), 1000 mm with the number of times 4, with a side of a square of 15 mm according to GOST 8559−75, of steel grade 20, with surface quality group B according to GOST 1051−73 with mechanical properties (M5) hardness (TV2), with the guarantee of weldability (HS), full hard (NG):

*

__________
* Consistent with the original. — Note the manufacturer’s database.

Calibrated rolled in bars, hex, with tolerance field h12 of random length (ND), inscribed circle diameter 8 mm according to GOST 8560−78, steel grade 45, with surface quality group according to GOST 1051−73 with mechanical properties (M1), with hardness (ТВ4), thermally treated (THAT):

Rolled with special surface finish in bars, round, with tolerance field h11 of random length (ND), 8 mm diameter, with surface quality group according to GOST 14955−77, of steel grade 20, with mechanical properties (M2), hardness (TVZ), full hard (NG):

.

Appendix e (mandatory). The scheme of sampling for monitoring of hardness for tempered specimens

Appendix E
(required)

Figure D. 1 — steel Products of circular cross-section

Figure D. 2 — Steel square section

Figure D. 3 — metal Products of rectangular cross section

Legend

 — cross section of the specimen; the specimen length from 55 to 60 mm.

B — area for hardness measurement.

Annex E (recommended). The heat treatment (annealing) of the samples to control the hardness listed in table 8

Annex E
(recommended)

Table E. 1

Steel grade	The mode of tempering samples
	Heating temperature, °C	Environment cooling
45	860±10	Oil
50, 50A	850±10	Oil
Notes 1 the Time of exposure after attainment of the quenching temperature — 20 min. 2 oil temp — (65±10) °C.

Appendix g (recommended). The heat treatment of workpieces (samples) to control the mechanical properties given in tables 4, 5 and 11

App W
(recommended)

Table J. 1

Steel grade	Tensile test							Impact test bend
	The mode of heat treatment of workpieces (samples)
	Normalization		Hardening		Vacation			Hardening		Vacation
	Tempera- round of heating, °C	The environment is cool Denia	Tempera- round of heating, °C	The environment is cool Denia	Tempera- round of heating, °C	The environment is cool Denia		Tempera- round of heating, °C	The environment is cool Denia	Tempera- round of heating, °C	The environment is cool Denia
08	920	the air	-	-	-	-		900	water	200	the air
10	920	the air	-	-	-	-		900	water	200	the air
15	900	the air	-	-	-	-		880	water	200	the air
20	900	the air	-	-	-	-		880	water	600	the air
25	890	the air	-	-	-	-		870	water	600	the air
30	880	the air	-	-	-	-		860	water	600	the air
35	880	the air	-	-	-	-		850	water	600	the air
40	870	the air	-	-	-	-		840	water	600	the air
45	860	the air	-	-	-	-		840	water	600	the air
50	850	the air	-	-	-	-		830	water	600	the air
55	850	the air	-	-	-	-		820	water	600	the air
58 (55пп)	850	the air	-	-	-	-		-	-	-	-
60	840	the air	-	-	-	-		820	water	600	the air
15G	880	the air	-	-	-	-		-	-	-	-
20G	880	the air	-	-	-	-		-	-	-	-
25G	-	-	880	water or air	560	the air		880	water or air	560	the air
30G	-	-	860	water or air	600	the air		860	water or air	600	the air
35G	-	-	860	water or air	600	the air		860	water or air	600	the air
40G	-	-	860	water or air	600	the air		860	water or air	600	the air
45G	-	-	850	oil or air	600	the air		850	oil or air	600	the air
50G	-	-	850	oil or air	600	the air		850	oil or air	600	the air
10G2	920	the air	-	-	-	-		-	-	-	-
30G2	-	-	880	oil or air	600	the air		880	oil or air	600	the air
35G2	-	-	870	oil or air	650	the air		870	oil or air	650	the air
40G2	-	-	860	oil or air	650	the air		860	oil or air	650	the air
45G2	-	-	850	oil or air	650	the air		850	oil or air	650	the air
50Г2	-	-	840	oil or air	650	the air		840	oil or air	650	the air
Notes 1 the «-" Sign means that heat treatment is not carried out. 2 Recommended minimum aging: in normalizing or quenching — 30 min; when tempering temperature 200 °C — 2 h; when tempering temperature 560 °C, 600 °C, 650 °C — 1 h 3 During heat treatment of workpieces according to the specified modes are permitted the following variations in temperature:
in normalizing or quenching							±15 °C;
when tempering temperature 200 °C							±30 °C;
when tempering temperature 560 °C, 600 °C, 650 °C							±50 °C.
4 By agreement between manufacturer and with the customer in determining the mechanical properties change the mode of heat treatment of workpieces, with a corresponding adjustment of the norms of mechanical properties. 5 is allowed before quenching carry out normalization. For steel products, intended for parts to be quenched by high frequency currents (HFC), normalizing before quenching is carried out with the consent of the customer.

App And (the recommended). The heat treatment of workpieces (samples) to control the mechanical properties shown in table 10

The Application And
(recommended)

Table I. 1

Steel grade	Hardening		Vacation
	Heating temperature, °C	Environment cooling	Heating temperature, °C
25	860−900	Water	550−600 Air cooling
30	850−890
35	840−880	Water or oil
40	830−870
45	820−860
50	810−850	Oil or water
55	805−850
60	800−840
Note — the Recommended minimum exposure: — when tempering — 30 min; — when on vacation — 1 HR.