GOST R 53932-2010

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  ГОСТ Р 53932-2010

GOST R 53932−2010 the Billet. General specifications

GOST R 53932−2010

Group B22, В32

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

THE BILLET

General specifications

Tube billet. General specifications

OKS 77.140.60
OKP 09 1300
09 1400

Date of introduction 2011−07−01

Preface

The objectives and principles of standardization in the Russian Federation established by the Federal law of 27 December 2002 N 184-FZ «On technical regulation», and rules for the application of national standards of the Russian Federation — GOST R 1.0−2004"Standardization in the Russian Federation. The main provisions"

Data on standard

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

2 SUBMITTED by the Technical Committee for standardization TC 375 «steel Products from ferrous metals and alloys"

3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology dated 12 November 2010, N 413-St

4 INTRODUCED FOR THE FIRST TIME


Information about the changes to this standard is published in the annually issued reference index «National standards», and the text changes and amendments — in monthly indexes published information «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in a 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 billets intended for production of seamless pipes, including gas-and-oil for the production of pipes with improved corrosion resistance.

2 Normative references

This standard uses the regulatory references to the following standards:

GOST 380−2005 carbon Steel of ordinary quality. Brand

GOST 1050−88 hire gauged bars with special surface finishing of carbon structural quality steel. General specifications

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

GOST 1778−70 (ISO 4967−79) Steel. Metallographic methods of determination of nonmetallic inclusions

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

GOST 2789−73 surface Roughness. Parameters and characteristics

GOST 4543−71 rolled alloy structural steel. Specifications

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

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

GOST 7565−81 (ISO 377−2-80) Iron, steel and alloys. Sampling method for determination of chemical composition

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

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

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

GOST 12344−2003 Steel alloyed and high alloy. Methods for determination of carbon

GOST 12345−2001 (ISO 671−82, ISO 4935−89) Steel alloyed and high alloy. Methods of determining sulphur

GOST 12346−78 (ISO 439−82, ISO 4829−1-86) Steel alloyed and high alloy. Methods for determination of silicon

GOST 12347−77 Steel alloyed and high alloy. Methods for determination of phosphorus

GOST 12348−78 (ISO 629−82) Steel alloyed and high alloy. Methods for determination of manganese

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

GOST 12350−78 Steel alloyed and high alloy. Methods for determination of chromium

GOST 12351−2003 (ISO 4942:1988, ISO 9647:1989) Steel alloyed and high alloy. Methods for determination of vanadium

GOST 12352−81 Steel alloyed and high alloy. Methods for determination of Nickel

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

GOST 12355−78 Steel alloyed and high alloy. Methods for determination of copper

GOST 12356−81 Steel alloyed and high alloy. Methods for determination of titanium

GOST 12357−84 Steel alloyed and high alloy. Methods for determination of aluminium

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 14959−79 rolled spring carbon and alloy steel. Specifications

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

GOST 18895−97 Steel. Method of photoelectric spectral analysis

GOST 19281−89 rolled steel with increased strength. General specifications

GOST 20072−74 heat-resistant Steel. Specifications

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

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 26877−91 metal Products. Methods of measuring form deviations of

GOST 28033−89 Steel. XRF technology

GOST 28473−90 Iron, steel, ferroalloys, chromium and manganese metal. General requirements for methods of analysis

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 published annually by the information sign «National standards» published as on January 1 of the current year and related information published monthly indexes published in 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 Classification

Billets are made:*
_______________
* Indicate characteristics of the material and their application — in accordance with [1]**.

** POS. [1]-[2], see Bibliography. — Note the manufacturer’s database.


according to the method of production:

casted — nlz;

hot from the ingot — GDS;

hot-deformed of the slab — PAU;

— accuracy:

high — B1;

ordinary — B1, B2, B3;

— length:

dimensional — MD;

measuring with non-standard length — MD1*;
_______________
* When the supply of rental length MD1, КД1, EA1 is allowed rental of random length not more than 5% of the batch weight.


dimensional — CD;

dimensional with random length — КД1*;
_______________
* When the supply of rental length MD1, КД1, EA1 is allowed rental of random length not more than 5% of the batch weight.


random — ND;

limited within the random lengths — OD;

limited from the random length — EA1*;
_______________
* When the supply of rental length MD1, КД1, EA1 is allowed rental of random length not more than 5% of the batch weight.


— the curvature of the classes I, II, III, IV.

— surface finishing:

without roughing or turning;

in peeled or stripped condition — ABOUT;

— ends:

no requirements for burrs;

no Burr — BR;

— control of mechanical properties:

without standardization and control of mechanical properties;

with rationing and control of mechanical properties — M;

— for corrosion resistance billets of steel grades prirodoslovno 10ПЛ and 20ПЛ for compositions 1 and 2.

4 steel grade

4.1 billets made:

hot-deformed steel grades with chemical composition:

— St2sp, st3sp and St4sp — according to GOST 380;

— according to GOST 1050;

— according to GOST 4543;

— according to GOST 19281;

— 65, 70, 75, 80, 85, 60G, 65G and 70G — according to GOST 14959;

— A, C, D, DB, 10G2A, 12Г2А, 12KH2NVFA (ЭИ712), 18Г2, 32Г2, 36G2S, 37Г2С, 37ХГФ, 38ХНМ and 60ХФА — table 1;

— 10ПЛ and 20ПЛ (compositions 1 and 2) — table 2;

— S-55, 0XM, 0XH3M — check when ordering;

nepreryvnolityh of steel grades according to when ordering.

4.1.1 According to customer’s requirement delivery tube blank of carbon steel with a mass fraction of sulfur no more than 0,035%. In this case, at the end of the mark is the letter a, for example 20A.

4.2 In the tube blank of steel grades specified in tables 1 and 2, the permitted deviation for chemical composition of steel from plotnogo analysis of ladle samples. Limit deviations should not exceed for steel grades:

— A, C, D, and DB — standards according to GOST 380, with the exception of the mass fraction of sulfur and phosphorus, which deviations are not allowed;

— 10ПЛ and 20ПЛ — norms according to GOST 1050;

— 10G2A, 12Г2А, 12KH2NVFA (ЭИ712), 18Г2, 32Г2, 36G2S, 37Г2С, 37ХГФ, 38ХНМ and 60ХФА — norms according to GOST 4543.


Table 1 — Chemical composition of steel by ladle analysis plavonia samples

Steel grade	Mass fraction of elements, %
	carbon	manganese	silicon	chrome	Nickel	WOL- FRAM	vanadium	molyb- Dan	sulfur	phosphorus	copper
									no more
And	Not regulated								0,045	0,045		0,25
With	Not regulated								0,045	0,045		0,25
D	0,41−0,48	0,60−0,90	0,17−0,37	Not more than 0.30	Not more than 0.30	-	-	-	0,045	0,045		0,25
DB	0,41−0,48	0,90−1,20	0,17−0,37	Not more than 0.30	Not more than 0.30	-	-	-	0,045	0,045		0,25
10G2A	0,07−0,15	1,20−1,60	0,17−0,37	Not more than 0.25	Not more than 0.25	-	-	-	0,025	0,025		0,20
12Г2А	0,12−0,20	2,00−2,40	0,17−0,37	Not more than 0.25	Not more than 0.25	-	-	-	0,025	0,025		0,20
18Г2	0,14−0,20	1,20−1,60	0,25−0,55	Not more than 0.30	Not more than 0.30	-	-	-	0,040	0,035		0,30
32Г2	0,30−0,35	1,20−1,50	0,17−0,37	Not more than 0.30	Not more than 0.25	-	-	-	0,035	0,035		0,20
36G2S	0,32−0,40	1,50−1,80	0,40−0,70	Not more than 0.25	Not more than 0.25	-	-	-	0,035	0,035		0,20
37Г2С	0,33−0,41	1,30−1,70	0,40−0,70	Not more than 0.25	Not more than 0.25	-	-	-	0,035	0,035		0,20
60ХФА	0,55−0,65	0,50−0,80	0,17−0,37	0,80−1,10	Not more than 0.40	-	0,10−0,20	-	0,030	0,035		0,25
37ХГФ	0,35−0,41	0,50−0,80	0,17−0,37	0,50−0,80	Not more than 0.25	-	0,08−0,12	0,08−0,14	0,045	0,045		0,25
38ХНМ	0,33−0,43	0,75−1,05	0,17−0,37	0,40−0,70	0,40−0,70	-	-	0,30−0,40	0,040	0,045		0,30
12KH2NVFA (ЭИ712)	0,08−0,15	0,30−0,70	0,17−0,37	1,90−2,40	0,80−1,20	Of 1.00 to 1.40	0,18−0,28	-	0,025	0,025		0,20
Notes 1 the Sign «-" means that the mass fraction of the element is not normalized and not in control. 2 In steel, made a scrapbook process or copper ore, is allowed the mass fraction of the residual copper and Nickel not more than 0.30% each. 3 In 37Г2С steel grade mass fraction of nitrogen should not exceed 0,012%. 4 Mass fraction of residual elements in steel grades: — A, C, D, and DB — GOST 380; — 10G2A, 12Г2А, 18Г2, 32Г2, 36G2S, 37Г2С, 60ХФА, 37ХГФ, 38ХНМ and 12KH2NVFA (ЭИ712) — according to GOST 4543.

Table 2 — Chemical composition of steel by ladle analysis plavonia samples

Steel grade	Com- sure	Mass fraction of elements, %
		carbon	manganese	silicon	chrome	Nickel	sulfur	phosphorus	copper
							no more
10ПЛ	1	0,07−0,14	0,35−0,65	0,17−0,37	0,20−0,50	0,20−0,50	0,040	0,035	0,30
10ПЛ	2	0,07−0,14	0,35−0,65	0,17−0,37	0,20−0,50	0,20−0,50	0,040	0,035	0,15−0,35
20ПЛ	1	0,17−0,24	0,35−0,65	0,17−0,37	0,20−0,50	0,20−0,50	0,040	0,035	0,30
20ПЛ	2	0,17−0,24	0,35−0,65	0,17−0,37	0,20−0,50	0,20−0,50	0,040	0,035	0,15−0,35
Note — have allowed arsenic not more than 0.08%.

Limit deviations for steel grades C-55, 0XM, 0XH3M agreed when ordering.

4.3 the Carbon equivalent of the steel should not exceed:

And 0.43% for steel grade 10ПЛ;

— 0,46% for steel grades 20ПЛ.

4.3.1 According to customer’s requirement pipe billet of the steel of other brands supply with a normalized carbon equivalent . Standards of carbon equivalent agreed when ordering.

5 Assortment

5.1 Hot-deformed pipe billet is manufactured in diameter from 70 to 350 mm.

5.1.1 the diameter of the tube blank and the limit deviation shall be as specified in tables 3 and 4.


Table 3

In millimeters

Nominal diameter	Maximum deviation of diameter
	Basic version	By agreement between manufacturer and consumer
From 70 to 159 incl.	B1 — according to GOST 2590	B1 — table 4 of this standard
From 160 to 200 incl.	+0,8 -2,5	B2, B3 — according to GOST 2590
SV. 200 to 270 incl.	B1 — table 4 of this standard	B2, B3 — according to GOST 2590
SV. 270 to 350 cyl.	According to the agreed specifications

Table 4 — Limit deviations in diameter for precision manufacturing B1

In millimeters

Nominal diameter	Limit deviation
70	+0,5 -1,1
80	+0,5 -1,3
85
90
95
100	+0,6 -1,7
105
110
115	+1,0 -1,7
120	+1,2 To 2.0
130
140
150
160	+1,5 -2,5
170
180
190
193
200	±2,5
210
215
220
230	±3,5
240	±3,6
250	±3,8
260	±3,9
270	±4,1
Note — allowed the supply of pipe billets with a diameter from 70 to 185 mm with step 1 mm with maximum deviations in the next lowest diameter.

5.1.2 Ovality of pipe shells shall conform to the requirements of GOST 2590.

5.1.3 Curvature of billets must meet the requirements of GOST 2590 for class IV.

By agreement between manufacturer and customer pipe billets with a diameter up to 200 mm supply requirements curvature according to GOST 2590 for classes II and III.

The curvature of the tube blank with diameter more than 200 mm shall not exceed 0,50% of the length.

5.1.4 pipe billets with a diameter of 140 mm obtained with nepreryvnolityh mills, crushing of the ends (larger diameter to smallest) should not exceed the value of 1.12.

5.1.5 manufacturer In agreement with the customer is allowed:

— supply of billets with ovality not exceeding the total limit deviation for diameter;

— when cutting tubular workpieces of all diameters on presses and saws, cold cut, the wrinkling of the ends (larger diameter to smallest) should not exceed the value of 1.12.

5.1.6 Length and type of performance along the length of the tube blank in accordance with GOST 2590согласовывают in order.

By agreement between manufacturer and customer delivery tube blank length and extreme deviations in length, not provided for in GOST 2590.

5.2 Requirements for grades continuous cast billets agreed when ordering.

5.3 the ends of the tube blank must be cut without crushing the ends and at the request of the customer without burrs (BZ). The cut should be straight. Cut end Squareness, mm must not exceed pipe billets with a diameter of less than 120 mm — 5 mm; 120 mm — 7 mm and should take billets for the limit deviations of length. At the ends of the continuous cast billets should not be wave-like traces of gas cutting allowed grat value not more than 7 mm.

Note — In the case of cutting a tube blank torch cutting kosina should not exceed 0.1 of the diameter.

6 Technical requirements

6.1 billets of steel grades 12KH2NVFA (ЭИ712), 18KH2N4MA (18KH2N4VA), 20KHN3A, 20KH2N4A, 20KHN4FA, 25KH2N4MA (25KH2N4VA), 30KHN3A, 38KHN3MA, 38KHN3MFA put in the annealed state (after annealing or high tempering), of steel other brands — without heat treatment.

6.2 On the surface of the hot-deformed pipe billet should not be cracked, captive, rolled out (unchained) contaminants sunsets (zakonov), mustache, flaws, foreign metal and slag inclusions, cavities from scale.

Allowed individual scratches, dents, rabiza, volosovichi if the depth does not exceed ¼ of total limit deviation for diameter.

Unacceptable defects shall be removed by gentle cutting or abrasive cleaning. The cleaning of billets of carbon steel with a mass fraction of carbon to 0.50% can be carried out a way to fire.

The depth of the cutting or Stripping shall not exceed the following values, in mm:

The 2.0 — pipe billets with a diameter of, mm, from 70 to 99 incl.;

2.5 — for billets with diameter, mm from 100 to 114 incl.;

The 3.0 — for billets with diameter, mm, from 115 to 139 incl.;

3,2 — pipe billets with a diameter of, mm, from 140 to 149 incl.;

4% of the diameter, and the manufacturer in agreement with the customer 5% of the diameter for pipe billet diameter, mm, 150.

Note — When removing the defects on the lines of mechanized Stripping allowed to increase the cutting depth by 1 mm in relation to the regulated standards for the respective diameters of billets.


By agreement between manufacturer and customer is allowed to change the depth of Stripping defects.

In one section is allowed no more than three sweeps of the maximum depth. Diametrically opposite the maximum depth of Stripping is not permitted.

The ratio of Stripping to its depth must be at least 6:1, and the agreement between manufacturer and customer at least 7:1.

6.2.1 By agreement between manufacturer and customer billets supplied in peeled or stripped condition (ABOUT). In this case, the cutting depth or Stripping shall not exceed half of the sum of limit deviations in the diameter of the tube stock to 140mm, and pipe billets with a diameter of 140 mm and — the sum of limit deviations.

The surface roughness of machined or stripped of billets must be 80 µm.

Note — By agreement between manufacturer and customer is possible to supply grinded or stripped of billets without roughness control.

6.2.2 the depth of the defects counting from the actual size.

6.3 On the surface of the continuous cast billets are admitted defects of mechanical origin, including dents from the rollers of the hauling-right of the camera, with the depth no more than half of total limit deviation for diameter. Sharp edges are not permitted. The traces of the swing of the mold without accompanying cracks should be of uniform character.

Allowed local Stripping of surface defects to a depth of not more than 5 mm. In one section is allowed no more than three sweeps of the maximum depth. Diametrically opposite the maximum depth of Stripping is not permitted. The ratio of Stripping to its depth must be at least 6:1.

The depth of the defects counting from the actual size.

6.4 Hot-deformed pipe billet in accordance with the supply order or a control (M) mechanical properties.

Nepreryvnolitogo billets are made without the regulation and control of the mechanical properties.

6.4.1 Mechanical properties of billets of steel grades listed in table 1 (except for the brand 37ХГФ) and from steel grades With a-55 and 10KHSND must meet the requirements of table 5. The mechanical properties of billets of steel of other grades shall conform to the requirements of GOST 1050 (M1 or M3 in accordance with the order), GOST 4543, GOST 14959, GOST 19281 and the extent of testing prescribed by this standard.


Table 5 — Mechanical properties

Steel grade	The type of heat treatment of workpieces	Mechanical properties, not less
		Yield strength, N/mm	Tensile strength, N/mm	Elongation , %	The relative narrowing , %	The impact strength KCU, j/cm
S-55	Normalization	-	630	12	35	-
And	Without heat treatment	245	410	25	-	-
With	Normalization	315	540	18	40	-
D	Normalization	375	640	16	40	39
DB	Normalization	375	640	16	40	39
10G2A	Normalization	-	420	22	50	-
12Г2А	Annealing	-	490	20	-	-
18Г2	Normalization	315	490	19	-	-
32Г2	The quenching and tempering,	540	740	14	50	39
36G2S	Normalization	490	740	12	35	-
37Г2С	The quenching and tempering,	540	735	14	50	59
60ХФА	Annealing	+	+	+	+	+
38ХНМ	Normalization with the release	540	740	12	40	49
10KHSND	Without heat treatment	315	460	16	-	-
12KH2NVFA (ЭИ712)	Annealing	-	490	18	-	-
Determined by the requirement of the customer. Allowed the normalization of the high holidays. Notes 1 the Mode of heat treatment of blanks defined by the manufacturer and specifies in the instrument of quality. 2 the Sign «+" means that the characteristic is determined, and the testing results are included in the document about the quality, the sign «— «indicates not normalized and do not define.

6.4.1.1 For a tube blank with a diameter of over 80 to 150 mm inclusive allowed the decrease of elongation at 2% abs., the relative contraction of 5% abs. and toughness by 10%, for tube blanks with a diameter of over 150 mm — a decrease of elongation of 3% abs., the relative contractions to 10% abs. and toughness by 15% in comparison with the standards specified in table 5.

Note — In the case of control of mechanical properties on specimens cut from samples reforged, the decline in standards is not allowed.

6.4.2 billets of steel grades 0XM, 0XH3M 37ХГФ and supply without rationing and control of mechanical properties.

6.5 Requirements to the macrostructure of billets

6.5.1 the Macrostructure of billets, ingots hot-deformed, should not have shrinkage porosity, bubbles, cracks, voids, foreign metal and slag inclusions, inversions crust, delamination and placenow.

The permissible defects of the macrostructure should not exceed the scores for round billets of steel:

		carbon	low alloy and alloy
	Central porosity	3	2
	point heterogeneity	3	2
	exudation square	3	2
	Pousada liquation	2	1
	subcortical bubbles at a depth of not more than 2 mm	2	2

For milled and stripped of billets subcortical bubbles are not allowed.

6.5.2 the Macrostructure of the continuous cast billets must not have edge cracks, bubbles, scabs, foreign metal and slag inclusions and placenow.

The permissible defects of the macrostructure should not exceed the scores for round billets of steel:

		carbon	low alloy and alloy
	Central (axial) porosity	3	2
	boundary point pollution	2	1
	light bar (contour)	3	3
	the axial segregation (axial chemical inhomogeneity)	3	2
	segregated strips and cracks	2	1

6.5.3 the Macrostructure of billets, hot-deformed of the slab should not have edge cracks, crusts, foreign metal and slag inclusions and placenow.

The permissible defects of the macrostructure should not exceed the scores for round billets of steel:

		carbon	low alloy and alloy
	Central porosity	3	2
	point heterogeneity	2	2
	boundary point pollution	1	1
	light contour	2	2
	segregated strips and cracks	2	1
	Pousada liquation	2	1
	subcortical bubbles at a depth of not more than 2 mm	2	2

6.6 requirements for the pollution of billets non-metallic inclusions

6.6.1 Pipe billets of alloy steel check on the contamination of non-metallic inclusions, which shall not exceed in the assessment maximum score:

— the oxides and silicates (FROM, OS, SP, CX) — 4,5 points;

— silicates, non-deformed (CH) — 5.0 points;

— the sulphides (A) — 4.5 points.

6.6.2 Pipe billet of carbon steel, low alloy steel and of steel grades 10ПЛ, 20ПЛ and-55 check on the contamination of non-metallic inclusions (CSNV) by agreement between manufacturer and customer.

Contamination of billets non-metallic inclusions shall not exceed 5.0 points in the evaluation by the maximum score for any of the inclusions listed in 6.6.1.

6.7 billets for gas-and-oil pipes with enhanced corrosion resistance made of steel prirodoslovno two compositions on corrosion resistance:

1 — for corrosive environment with total mineralization of up to 20,000 mg/DMinclusive (10ПЛ-1, 20ПЛ-1);

2 — for corrosive environment with total mineralization of more than 20000 mg/DMbut not exceeding 40,000 mg/DM(10ПЛ-2, 20ПЛ-2).

6.7.1 General corrosion Speed not more than 0.40 mm per year guaranteed chemical composition and manufacturing technology of tubular workpieces.

6.8 manufacturer In agreement with the customer hot-deformed pipe billet is subjected to checks at internal discontinuities by ultrasonic technique (UT).

The tubular billet should correspond to the quality group 2 according to GOST 21120.

The agreed specifications are allowed to define another quality group.

6.9 Additional requirements for the tube blank are given in Appendix A.

6.10 Scheme and symbols are examples of billets is given in Appendix B.

7 Rules of acceptance and test methods

7.1 General rules for acceptance, marking and registration of the document of quality — according to GOST 7566.

7.2 To the acceptance of the billets show parties. The party consists of a tube blank of the same diameter, one melting ladle-in the case of casting in ingot or a single grade of steel, of the sequence in continuous casting of steel.

7.2.1 billets of carbon steel, smelted in furnaces with a nominal weight up to 50 t can be presented for acceptance by the parties, consisting of not more than four heats, the difference in the mass fraction of carbon in the trunks shall not exceed 0,03% mass fraction manganese, 0.15 per cent. Steel in this case, mark the one melting with the average chemical composition. At the request of the customer in the party include billets of steel from one heat.

7.3 Sampling for chemical analysis is carried out in accordance with GOST 7565, chemical analysis according to GOST 12344-GOST 12352, 12354 series GOST, GOST 12355−12357 GOST, GOST 12359,12361 GOST, GOST 17745, GOST 18895, GOST 22536.0 to GOST 22536.12, 28033 GOST, GOST 28473 or other methods providing the required accuracy of the analysis.

Analysis of the mass fraction of the residual copper, arsenic, chromium and Nickel is allowed not to perform if the manufacturer guarantees their mass fraction is not more than specified in this standard.

7.3.1 Carbon equivalent , %, define:

— steel grades 10ПЛ and 20ПЛ by the formula

; (1)

— other steel grades according to the formula

, (2)

where , , , , , and  — mass fraction of carbon, manganese, chromium, molybdenum, vanadium, copper and Nickel in the steel at plavonia analysis of ladle samples %.

7.4 surface Quality and length control on each tube blank.

7.5 Ultrasonic testing according to GOST 21120 subjected to 100% of pipe blanks.

7.6 quality control of billets for other indicators taken from the party:

to control the shape and size of the cross section is 10% of pipe blanks, but not less than 5 pieces;

— for testing tensile and impact strength — one billets;

— to control the macrostructure of two tubular workpieces;

— to control the austenitic grain — one billets;

— for the control of contamination non-metallic inclusions — two pipe shells. By agreement between manufacturer and customer can be established the frequency of monitoring, subject to the limits specified in 6.6.

7.7 each control tube blank taken:

for tensile tests — one sample;

for testing the impact strength — three of the sample;

— to control the macrostructure is one templet;

— to control the austenitic grain — one sample;

— for the control of nonmetallic inclusions — three cone.

7.8 the Absence of surface defects control inspection without using of magnifying devices. If necessary, defects can be carried out a bleaching by mechanical means or etching.

7.8.1 permitted to control the surface of the pipe blank by ultrasonic, tape, magnetic particle, and other nondestructive methods according to the methods agreed in the prescribed manner.

7.8.2 Determination of surface roughness of milled or stripped of billets is carried out according to GOST 2789. Allowed evaluation of surface roughness of milled or stripped of billets according to agreed standards.

7.9 dimensional Control of the tube billet is carried out standardized means of measurement and means of admittance control.

7.9.1 Methods of testing deviations of form — according to GOST 26877.

7.10 Sampling for mechanical tests carried out according to GOST 7564. Mechanical properties determined on longitudinal specimens cut from heat treated billet diameter (with a side of a square) 25mm.

For a tube blank with a diameter (with a side of a square) over 150 to 200 mm inclusive are allowed to take samples from perinatalnyj or reforged billet diameter (with a side of the square) from 80 to 100 mm, for workpiece diameter (with a side of a square) over 200 mm — workpiece diameter (with side of the square) 140 mm. By agreement between manufacturer and customer is allowed to control the mechanical properties on samples taken from perekatnoe or reforged billet diameter (with a side of the square) from 80 to 100 mm.

7.11 tensile Test is carried out according to GOST 1497.

Test for impact strength is carried out according to GOST 9454 on samples of type 1.

To determine the mechanical properties allowed the application of non-destructive testing (statistical) control methods in accordance with the procedure prescribed in the standard [2].

In arbitration cases, using standardized test methods.

7.12 Evaluation of the macrostructure of billets carried out on the etched templeto without the use of magnifying devices:

— from hot-deformed bars — according to GOST 10243;

— casted according to the standard [3];

— hot-deformed of the slab — GOST 10243, regional dot pollution — according to the standard [3], phase separation strips — N scale 1 Annex B.

In the case of ultrasonic inspection of defect in accordance with the requirements 6.8 evaluation of the macrostructure of the etched on templeto not carried out.

7.13 Control of pollution of billets non-metallic inclusions is carried out according to GOST 1778 method Ш6.

7.14 Control of the austenitic grain size is carried out according to GOST 5639.

7.15 Ultrasonic inspection of defect is carried out according to GOST 21120. Allowed to carry out the control according to the method of the manufacturer.

In arbitration cases, using a standardized scoring method.

7.16 In the supply of billets one trunks of different diameters, it is allowed to disseminate the results of the tests (control) macrostructure, non-metallic inclusions and mechanical properties of the batch of workpieces of larger cross section on a batch of workpieces of smaller cross-section.

8 Marking and packing

8.1 Marking and packing of billets — GOST 7566, as for long products, with the following additions.

8.1.1 Color-coded billets is determined by agreement between manufacturer and customer.

8.1.2 billets of steel prirodoslovno additionally mark the numbers with a hyphen after the brand:

10ПЛ-1, 20ПЛ-1 for composition 1;

10ПЛ-2, 20ПЛ-2 — for composition 2.

8.1.3 billets are Packed in bundles weighing not more than 10 tons, according to customer demand — no more than 5 t-tape, catalkoy or wire. Allowed the formation of bundles with the use of packaging clips.

9 Transportation and storage

9.1 Transportation and storage of billets — GOST 7566 with the following additions.

9.1.1 billets transporterowych in packs. Bundles shall be separated from each other in a secure grip.

9.1.2 permitted loading on the platform or in the car, a tube blank of not more than three heats of the same steel grade, the same diameter or two heats of different grades of steel under the condition of reliable separation of one smelting and steel grade from another.

In the car with a capacity of 93 t allowed loading of billets no more than four heats, the car with a lifting capacity of 125 tons — no more than five heats.

By agreement between manufacturer and customer can be allowed for loading in a car tube blank, without limiting the number of heats.

Annex a (informative). Additional requirements to the tube blank

Appendix A
(reference)

By agreement between manufacturer and customer billets are manufactured with the following additional requirements or modifications to the requirements for basic delivery status according to the standard for specified grade or class of steel. Additional requirements in the order determined by reference to the number of section, subsection of this Appendix, which sets forth the requirement, for example: «A. 1.1».

A. 1 Of steel at 4.1 requirements for chemical composition.

A. 1.1 grade D with a mass fraction of elements, %:

manganese — 0,65−0,90;

of chromium — not more than 0.25;

sulphur and phosphorus — no more than 0.35 each.

Mass fraction of Nickel is not normalized.

A. 1.2 Marks D and DB with the recommended chemical in the mass fraction of carbon, manganese and silicon, provided that the level of mechanical properties are given in table 5.

A. 1.3 Stamps 10 with a mass fraction of silicon from 0.15% to 0.25% and a mass fraction of nitrogen of not more than 0,010%.

A. 1.4 Brand 20 with a mass fraction of elements, %:

aluminum 0,020−0,070;

vanadium is not less than 0.03;

sulfur — not more than 0,013;

phosphorus not more than 0,018;

copper — 0,25.

Allowed the modification of the steel of silico-calcium calculate the mass fraction of calcium (without groove) 0,03%-0,05% that chemical analysis is not defined, and the document quality indicates the estimated value.

Limit deviation in the tube blank by mass percentage of aluminum plus 0.005 per cent.

A. 1.5 Brand 32Г2 with a mass fraction of elements, %, not more:

Nickel — 0,20;

copper and 0.30.

A. 1.6 Brand 30KHMA with a mass fraction of elements, %:

carbon — 0,28−0,38;

aluminum 0,020−0,070;

sulfur — 0,015−0,035.

Limit deviation in the tube blank by mass percentage of aluminum plus 0.005 per cent.

A. 2 of steel grade 15H5M with the chemical composition according to GOST 20072.

Allowed modification of steel by cerium from the calculation of the mass fraction of 0.05%, which chemical analysis is not defined in the document quality indicates the estimated value.

A. 3 Of steel grades 10 and 20 with impurity, non-metallic inclusions in the evaluation by the maximum score, points, not more:

A 4.0 — sulphides ();

4,0 — oxides (FROM, OS);

4,0 — silicate (SP, CX);

4,5 — silicates, non-deformed (SN).

A. 4 of steel grade 20 with impurity, non-metallic inclusions, points, not more:

when assessing the average score:

2,5 — sulphides ©,

2,5 — oxides (FROM, OS),

2,5 — silicates (SP, SC, SN);

in the evaluation by the maximum score:

A 4.5 for each type of inclusions.

A. 5 steel 15KHM brands and 30KHMA with contamination of non-metallic inclusions, in addition to sulphide, not more than 4.0 points for evaluation by the maximum score.

Contamination by sulfides is not normalized and not in control.

A. 6 Of steel grades 15KHM, 20KHGNM and 30KHMA control austenitic grain size, which should be no larger than 5 rooms.

A. 7 steel brand 37ХГФ contamination with nonmetallic inclusions, points, not more:

in the evaluation by the maximum score:

4,5 — sulphides ();

4,5 — oxides and silicates (FROM, OS, SP, CX);

A 5.0 — silicates, non-deformed (SN);

when assessing the average score:

A 4.0 for each type of inclusions.

A. 8 steel stamps 37Г2С with contamination of non-metallic inclusions in the evaluation, points, not more:

maximum score:

4,5 — sulphides ();

4,5 — oxides and silicates (FROM, OS, SP, CX);

A 5.0 — silicates, non-deformed (SN);

average score:

A 4.0 for each type of inclusions.

A. 9 Of steel grades 10 and 20 with the chemical composition according to table A. 1 and mechanical properties in table A. 2.


Table A. 1

	Mass fraction of elements, %, plavonia analysis of ladle samples
Steel grade	carbon	silicon	manganese	sulfur	Foz fora	copper	no- Kehl	chrome	nitrogen	Vana- Diya	molyb- Dan	titanium	aluminum	of niobium	Carbon Rodney equi- valent
				no more
10	0,07−0,12	0,17−0,37	0,35−0,65	0,030	0,030	0,25	0,25	0,15	0,010	0,08	0,15	0,04	0,020−0,070	0,01	0,37
20	0,17−0,25	0,17−0,37	0,35−0,65	0,030	0,030	0,25	0,25	0,25	0,010	0,08	0,15	0,04	0,020−0,070	0,01	0,41
Notes 1 total mass fraction of niobium and vanadium in the steel is not more than 0.03%. 2 total mass fraction of chromium, copper, molybdenum, Nickel and vanadium should not exceed 1,00%. 3 Limit deviations: chemical composition in the pipe preparation — according to GOST 1050, the mass fraction of nitrogen plus is 0.003% aluminum — ±0,005%, phosphorus — not allowed.

Table A. 2

Steel grade	A heat treatment process	Mechanical properties
		Tensile strength, N/mm	Yield strength , N/mm	Elongation , %
				in the longitudinal direction	in the transverse direction not less than
				not less than
10	Normalization at the temperature of 900 °C — 920 °C	350−480	235	28	23
20		420−550	275	22	19
For billets with a diameter of 100 mm or more.

A. 10 Of steel grades, 20B, and 20C with the chemical composition corresponding to table A. 3.


Table A. 3

Steel grade

Mass fraction of elements, %, plavonia analysis of ladle samples

carbon

manganese

silicon

chrome

molyb- Dan

sulfur

Foz fora

Vana- Diya

aluminum

nitrogen

copper

Nickel

no more

no more

20V

0,17−0,24

0,35−0,65

0,15−0,35

0,25

0,15

0,025

0,025

0,08

-

+

0,30

0,30

20C

0,17−0,24

0,45−0,65

0,17−0,37

0,20

-

0,013

0,018

-

0,020−0,070

0,012

0,20

0,20

Notes 1 the Sign «-" means that the mass fraction of the element is not normalized, the chemical analysis does not determine the document about quality not indicate. 2 the Sign «+" means that the mass fraction of nitrogen should correspond to GOST 1050. For steel produced in electric furnaces, also determine the mass fraction of nitrogen. In the document on quality indicates the actual result of the control. 3 steel grade 20C further define the mass fraction of arsenic, niobium and titanium. In the document of quality indicative of their actual value. 4 maximum deviations in chemical composition in the tube blank must match trebovaniye 1050.

A. 11 Of 37Г2С steel grade with the chemical composition according to table A. 4 and mechanical properties in table A. 5.


Table A. 4

Steel grade	Mass fraction of elements plavonia analysis of ladle samples %
	carbon	silicon	manganese	chrome	molybdenum	Nickel	sulfur	phosphorus	copper
				no more
37Г2С	0,33−0,45	0,40−0,70	1,30−1,60	0,25	0,30	0,25	0,035	0,035	0,30
Note — maximum deviations in the tube blank: carbon, silicon, manganese, chromium — according to GOST 4543, Nickel plus 0.05 percent.

Table A. 5

Steel grade	The mode of heat treatment of samples	Mechanical properties, not less
		Yield strength , N/mm	Tensile strength, N/mm	Elongation ,%
37Г2С	Normalization: heating to a temperature (880±15) °C; exposure 15−30 min; air cooling	490	740	12

A. 11.1 Carbon equivalent of the steel , %, determined by the formula must be in the range of 0.56%-0,70%:

. (A. 1)

A. 12 Of steel 15KHM with the chemical composition according to table A. 6 mechanical properties and hardness table A. 7.


Table A. 6

Steel grade	Mass fraction of elements plavonia analysis of ladle samples %
	carbon	silicon	manganese	chrome	molyb- Dan	aluminum	sulfur	Foz fora	copper	Nickel
								no more
15KHM	0,11−0,19	0,17−0,37	0,40−0,70	0,80−1,10	0,40−0,60	0,020−0,070	0,015−0,035	0,035	0,30	0,30
Note — maximum deviations in the tube blank in accordance with GOST 4543, the mass fraction of aluminum plus 0.005 per cent.

Table A. 7

Steel grade	Mechanical properties, not less					Brinell hardness number
	Tensile strength, N/mm	Yield strength, N/mm	Relative		The impact strength KCU, j/cm	Indentation diameter, mm, not less	The number of hardness HB (HBW), not more
			elongation, %	contraction, %
15KHM	390	215	22	50	117	4,6	170

A. 13 of steel grade АЦ20ХГНМ.

A. 13.1 Chemical composition of steel in accordance with GOST 4543 for steel grade 20KHGNM, in addition to the mass fraction of sulphur, which should be 0,030%-0,070%.

In steel injected calcium by calculation (without groove) for 0.03% of the cored wire into the ladle prior to casting. Mass fraction of calcium chemical analysis is not determined, but guarantee the technology of production of not less than 0.001%.

Mass fraction of residual elements in the steel and limit deviations of chemical composition in the tube blank in accordance with GOST 4543, like steel grade 20KHGNM, in addition to elements, %:

±0,04 — manganese;

±0,03 — Nickel;

+0,005 — phosphorus;

minus 0,005 — sulphur.

A. 13.2 Mechanical properties of billets and the mode of heat treatment of the samples shall meet the requirements of GOST 4543, like steel grade 20KHGNM, in addition to the quenching temperature, which should be 850 °C — 870 °C. the Diameter of the samples of 5 or 10 mm, defined by the manufacturer.

A. 13.3 Allowable defects of a macrostructure of a tube blank must not exceed the following standards points:

1 — pousadela liquation;

2 — Central porosity;

3 — point heterogeneity;

3 — phase separation the square.

A. 13.4, the Size of austenitic grains should be no bigger than 5 rooms.

Allowed the presence of single grains of 3 to 10% of metal of the order.

A. 14 of steel grade 70пп low hardenability.

A. 14.1 Chemical composition of steel by ladle analysis plavonia the sample must conform to table A. 8, the maximum deviations in chemical composition in the tube blank table A. 9.


Table A. 8

Steel grade

Mass fraction of elements, %, plavonia analysis of ladle samples

carbon

silicon

manganese

sulfur

phosphorus

titanium

Alu- MINIA

nio- Biya

chrome

Nickel

copper

calcium

nitrogen

no more

no more

70пп

0,65−0,81

0,15−0,28

0,15−0,25

0,015

0,025

0,020- 0,100

0,020- 0,070

0,010- 0,036

0,15

0,15

0,15

0,0008- 0,0050

0,010- 0,023

Table A. 9

Steel grade	Limit deviation, %
	carbon	silicon	manganese	aluminum	nitrogen	titanium	of niobium
70пп	±0,01	±0,02	±0,05	±0,005	±0,001	±0,005	±0,010

A. 14.2 Macrostructure of billets, GOST 10243 controlled, must not exceed the following standards points:

2 — Central porosity;

2 — point heterogeneity;

2 — exudation square;

2 — Pousada liquation.

A. 15 of steel grade P235GH (1.0345) with the chemical composition corresponding to table A. 10.


Table A. 10

Steel grade	Mass fraction of elements, %
	carbon	silicon	manganese	phosphorus	sulfur	aluminum	chrome	copper	molybdenum
				no more		not less than	no more
P235GH (1.0345)	0,07−0,12	0,17−0,35	0,35−0,65	0,025	0,020	0,020	0,15	0,30	0,08

End of table A. 10

Steel grade	Mass fraction of elements, %
	of niobium	Nickel	titanium	vanadium	arsenic	chromium + copper + + molybdenum + + Nickel	of niobium + vanadium + + titanium
	no more
P235GH (1.0345)	0,010	0,30	0,040	0,02	0,08	0,70	0,05
Notes 1 To become further define the mass fraction of nitrogen. In the document on as indicative of its actual value. 2 allowed for the production of billets of steel grade P235GH (1.0345) with a mass fraction of silicon 0,15%-0,25%.

Appendix B (mandatory). Scheme and examples of symbols

Appendix B
(required)

Examples of symbols:

The hot-deformed billet from the ingot (GDS), increased accuracy rolling (B1), class II curvature, length (MD), with a diameter of 100 mm, of steel grade 18Г2, with control of mechanical properties (M):



The hot-deformed billet from continuous cast metal (PAU), the usual accuracy of rolling (B1), class III by the curvature of random length (ND), without burrs (BZ), diameter of 115 mm, of steel grade 20ПЛ composition 1, without the control of mechanical properties:



The hot-deformed billet from the ingot (GDS), peeled (ABOUT), the usual accuracy of rolling (V1), of length bounded by random length (EA1), the curvature of the class IV, with a diameter of 115 mm, of steel grade 20 chemical composition and mechanical properties control (M1) according to GOST 1050−88:



The hot-deformed billet from continuous cast metal (PAU), the usual accuracy of rolling (B2), grade IV according to the curvature, measuring length, random length (MD1), with a diameter of 70 mm, of steel grade D with additional requirements under subsection A. 1.1:

or

Annex b (mandatory). Description of scale scale N 1 and N 1 for the evaluation of phase separation in hot-deformed strips of the tube blank from the continuous cast metal

The App
(required)

Scale N 1 estimate of phase separation strips 4 points.

B. 1 Description of macro-structure, corresponding to individual points of the scale

Score 1 — segregated stripes group and single width up to 0.1 mm, up to 5% of the diameter of the tube blank.

Score 2 — phase separation of group and single strips up to a width of 0.5 mm, a length of up to 10% of the diameter of the tube blank.

Score 3 — phase separation of group and single strips up to a width of 1.0 mm, a length of up to 10% of the diameter of the tube blank.

Score 4 — phase separation of group and single strips of a width exceeding 1.0 mm, a length of more than 10% of the diameter of the tube blank.

V. 2 Scale N 1

Score 1

Score 2

Score 3

Score 4