GOST 10702-78

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  ГОСТ 10702-78

GOST 10702−78 hire from quality structural carbon and alloyed steel for cold extruding and upsetting. Specifications (with Amendments No. 1, 2)

GOST 10702−78
Group В32

INTERSTATE STANDARD

RENTAL OF HIGH-QUALITY STRUCTURAL CARBON AND ALLOYED STEEL FOR COLD EXTRUDING AND UPSETTING

Specifications

Steel bars, carbon and alloy, structural, for cold extruding and upsetting. Specifications

OKP 09 5000; 4100 11; 11 5000

Date of introduction 1980−01−01

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR

2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from 03.08.78 N 2101

3. REPLACE GOST 10702−63

4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS

The designation of the reference document referenced	Item number
GOST 8.326−89	5.2
GOST 162−90	5.2
GOST 166−89	5.2
GOST 427−75	5.2
GOST 1050−88	3.2
GOST 1051−73	2.4, 3.8, 3.9, 6.1
GOST 1497−84	5.8
GOST 1763−68	5.9
GOST 1778−70	5.13
GOST 2216−84	5.2
GOST 2590−88	2.1, 2.4
GOST 2879−88	2.1
GOST 3749−77	5.2
GOST 4543−71	3.2, 3.3, 3.11, 3.15
GOST 5378−88	5.2
GOST 5639−82	5.10
GOST 5640−68	5.11
GOST 6507−90	5.2
GOST 7417−75	2.1, 2.4
GOST 7502−98	5.2
GOST 7564−97	5.6
GOST 7565−81	4.3
GOST 7566−94	4.1, 4.5, 6.1
GOST 8233−56	5.11
GOST 8560−78	2.1
GOST 8817−82	5.7
GOST 9012−59	5.12
GOST 10243−75	5.5
GOST 12344−88	5.1
GOST 12345−2001	5.1
GOST 12346−78	5.1
GOST 12347−77	5.1
GOST 12348−78	5.1
GOST 12349−83	5.1
GOST 12350−78	5.1
GOST 12351−81*	5.1
_______________ * On the territory of the Russian Federation GOST 12351−2003. — Note the manufacturer’s database.
GOST 12352−81	5.1
GOST 12353−78	5.1
GOST 12354−81	5.1
GOST 12355−78	5.1
GOST 12356−81	5.1
GOST 12357−84	5.1
GOST 12358−82*	5.1
______________ * On the territory of the Russian Federation GOST 12358−2002. — Note the manufacturer’s database.
GOST 12359−99	5.1
GOST 12360−82	5.1
Round bar GOST 14955−77	2.1, 3.8, 6.1
GOST 18895−97	5.1
GOST 22536.0−87	5.1
GOST 22536.1−88	5.1
GOST 22536.2−87	5.1
GOST 22536.3−88	5.1
GOST 22536.4−88	5.1
GOST 22536.5−87	5.1
GOST 22536.6−88	5.1
GOST 22536.7−88	5.1
GOST 22536.8−87	5.1
GOST 22536.9−88	5.1
GOST 22536.10−88	5.1
GOST 22536.11−87	5.1
GOST 22536.12−88	5.1
GOST 24597−81	6.1
GOST 26877−91	5.2
GOST 28473−90	5.1

5. Ogranicheni term actions taken by Protocol No. 5−94 of the Interstate Council for standardization, Metrology and certification (ICS 11−12−94)

6. EDITION with Amendments No. 1, 2 approved in June 1985, November 1989 (IUS 10−85, 2−90)


This standard applies to calibrated with special surface finish rolling for the manufacture of products by cold extrusion and upsetting and hot-rolled steel (strip, wire rod) for the manufacture and calibrated with special surface finish rolling and wire.

As part of the rules of the chemical composition standard also applies to bars and billets intended for products produced by cold extrusion and upsetting.

(Changed edition, Rev. N 2).

1. CLASSIFICATION

1.1. Rentals are divided as follows:

according to the method of fabrication:

hot-rolled,

calibrated

hot-rolled and calibrated with special surface finish;

— as material:

thermally processed (vacation or conventional annealing),

thermally treated (annealing spheroidizing) — TC

without heat treatment,

full hard (calibrated and calibrated with special surface finish) — N;

— the magnitude of the deformation under the cold sediment on the group:

to the initial specimen height — 50,

to the initial specimen height — 66,

to the initial height of the sample under test for controlling the heat-treated samples (after a holiday, the usual annealing or annealing spheroidizing) — 66 Т;

to its original height during the test for control and heat-treated (after spheroidizing annealing) and grinded samples 66И,

to the initial specimen height — 75,

to its original height during the test for control and heat-treated (after spheroidizing annealing) and grinded samples 75И;

— the quality of the surface (hot rolled steel) — groups 1 and 2.

(Changed edition, Rev. N 1, 2).

2. ASSORTMENT

2.1. Shape, dimensions and limit deviations of the dimensions of the rental and other requirements to the assortment should meet the standard assortment listed in table.1.

Table 1

Product	The designation of the standard	Size, mm	Accuracy class	Kvalitet
Hot-rolled mill:
— round	GOST 2590*	From 5 to 45	A, B, C	-
— hex	GOST 2879**	From 8 to 48	B
Rolled calibrated:
— round	GOST 7417	From 3 to 42	-	h10, h11, h12
— hex	GOST 8560	From 7 to 40		h10, h11
Profile cold drawn shestigrannyj	GOST 8560	From 3.0 to 6.5		h10, h11
Rolled with special surface finish	GOST 14955	From 5 to 30		h10, h11, h12
		SV. 30 to 50		h11, h12

_______________
* On the territory of the Russian Federation GOST 2590−2006, here and hereafter;
** On the territory of the Russian Federation GOST 2879−2006. — Note the manufacturer’s database.

Note. In the absence of specifying a user class accuracy or quality chosen by the manufacturer.


(Changed edition, Rev. N 2).

2.2. Hire made:

— hot round and hex:

size from 5 to 7 mm — in rolls,

the size of St. 7 to 42 mm — in coils and rods,

size SV 42 mm — in bars;

— drawn round and hex:

less than 5 mm — in rolls,

size St. 5 to 40 mm — in coils and bars;

— cold-drawn hexagonal profile with the size less than 7 mm — in rolls;

— special surface finish of all the amounts specified in the table.1 — in coils and bars.

Note. Coil’s weight should be 0,03−2,1 t


(Changed edition, Rev. N 1, 2).

2.3. The ends of hot-rolled bars need to be trimmed. For bars, cut into presses and shears, permitted crumpled ends. At the request of the consumer burrs on the ends of bars must be stripped.

Hot-rolled steel in coils are made without trimming the ends. At the request of the consumer the ends of skeins, designed for the landing of goods on semi-automatic and automatic equipment must be circumcised.

2.4. The ends of the calibrated rods and coils with special surface finish should be circumcised without bend and burrs. When cutting with shears allowed crushing the stub end while maintaining the size of the second dragged the end. In coordination with the consumer bars are made with a limited length of the crushed end. Dragged at the end of the allowed bands.

At the request of the consumer rental with a diameter of over 12 mm are made with chamfer on one end.

Examples of symbols

Hot-rolled steel with a diameter of 15 mm rods, high accuracy rolling B churchyard 2590, grade 30, group of quality surface 1, groups 50 precipitation without heat treatment:

A calibrated Bicycle with a diameter of 25 mm in coils of tolerance h11 GOST 7417, 10kp steel grade, surface quality B according to GOST 1051, groups, precipitation 66, full hard — N:

Rolled with special surface finish diameter of 6.60 mm, the rods kvalitet h12, group of quality surface D according to GOST 14955, thermally treated (annealing spheroidizing):

2.3, 2.4. (Changed edition, Rev. N 2).

3. MARKS AND TECHNICAL REQUIREMENTS

3.1. Rental must be manufactured in accordance with the requirements of this standard according to the technological instructions approved in the prescribed manner.

(Changed edition, Rev. N 1, 2).

3.1a. Rental produce the following grades: 08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25, 30, 35, 40, 45, 50, 15X, 20X, 30S, 35X, 38KHA, 40H, 45KH, 15G, 20G, 40G, 45G, 20G2, 35G2, 40G2, 38KHS, 12KHN, 40KHN, 50KHN, 15KHF, 15KHM, 16KHSN, 19KHGN, 30KHMA, 12ХНЗА, 20KHGSA, 30KHGSA, 35HGSA, 15KHGNM, 38KHGNM, 18KH2N4MA, 25KH2N4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 30KHN2MFA.

(Changed edition, Rev. N 2).

3.2. The chemical composition must comply with:

— carbon steel grades 08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 25, 30, 35, 40, 45, 50 — the requirements of GOST 1050, except for the mass fraction of silicon, which is set not more than 0.03% for steel grade 10kp, not more than 0.10% semi-killed steel grades and 0.20% for steel grades 25, 30, 35, 40 and 45. Mass fraction of manganese in steel grades 25, 30, 35, 40 and 45 should be no more than 0.60 percent;

alloy steel grades of 15X, 20X, 30S, 35X, 38KHA, 40H, 45KH, 15G, 20G, 35G2, 40G2, 40G, 45G, 38KHS, 40KHN, 50KHN, 15KHF, 15KHM, 30KHMA, 12KHN3A, 20KHGSA, 30KHGSA, 35HGSA, 18KH2N4MA, 25X2H4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 30KHN2MFA — the requirements of GOST 4543. Mass fraction of silicon in steel grades 15X, 20X, 30S, 35X, 40X, 45KH, 40KHN, 15KHF, 30KHMA should be not more than 0.20%; mass fraction of manganese in steel grades 15X, 20X and 30X — not more than 0,60%.

3.3. The chemical composition of steel grades 20G2, 12KHN, 16KHSN, 19KHGN, 15KHGNM, 38KHGNM must comply with the specified in table.2. Permissible deviations in chemical composition in ready-to-hire — according to GOST 4543.

Table 2

Steel grade	Mass fraction of elements, %
	Carbon	Silicon	Manganese	Sulfur	Phosphorus	Chrome	Nickel	Molybdenum	Copper, no more
				no more
20G2	0,18−0,26	0,17−0,37	1,30−1,60	0,035	0,035	Not more than 0.25	Not more than 0.25	-	0,20
12KHN	0,09−0,15		0,30−0,60			0,40−0,70	0,50−0,80		0,30
16KHSN	0,13−0,20	0,60−0,90				0,80−1,10	0,60−0,90		0,20
19KHGN	0,16−0,21	0,17−0,37	0,70−1,00				0,80−1,10	Not more than 0.10	0,30
15KHGNM	0,13−0,18		0,70−1,10			0,40−0,70	0,40−0,70	0,15 — 0,25
38KHGNM	0,37−0,43		0,50−0,80			0,40−0,60

(Changed edition, Rev. N 1, 2).

3.4. Hot-rolled and hot-rolled with special surface finish rolled to produce heat-treated (annealed, tempered, after spheroidizing annealing) or without heat treatment, and the calibrated and calibrated with special surface finish rolling cold-worked, annealed condition or after annealing spheroidizing.

A heat treatment process should be installed in order. Allowed instead of specified in the order of hot-rolled steel fabricating heat-treated in agreement with the consumer.

3.5. Mechanical properties and hardness of the rolled in the heat-treated condition shall be as specified in table.3 without heat treatment and cold-worked or cold-worked condition with an intermediate heat treatment is given in table.4.

Table 3

Steel grade	Hardness HB, no more		Tensile strength , N/mm(kgf/mm)		The relative narrowing , %, not less
	after a holiday or a conventional annealing	after spheroidize — roumega annealing
	Hot-rolled steel rolled steel with special surface finish	Steel calibrated and calibrated with special surface finish
08KP, 08ps	115	131	310−410 (32−42)	290−390 (30−40)	60
08					55
10kp, 10ps		143			50
10			330−450 (34−46)	310−410 (32−42)	55
15kp, 15ps	125	149	360−470 (37−48)	320−420 (33−43)
15
20kp, 20ps 20	132	163	390−490 (40−50)	340−440 (35−45)	50
25	156	170	Not more than 540 (55)	No more 490 (50)
30		179	Not more than 570 (58)	Not more than 520 (53)	45
35	163	187	Not more than 590 (60)	Not more than 540 (55)
40		197		+	40
45	170	207
50	217	217	+		+
15X	156	179	No more than 550 (56)	340−440 (35−45)	60
20X	163			360−470 (37−48)
30S	170	187	+	+	+
35X
40X	179	207
45KH		229
38KHA	187	207	Not more than 590 (60)	Not more than 560 (57)	60
15G	163	163	+	+	+
20G	179	187
20G2	187	197
35G2		207
40G	207
45G	229	229
40G2	217	255
38KHS	255
12KHN	+	+	410−530 (42−54)	410−510 (42−52)	70
40KHN	179	207	+	+	+
50KHN	197	217
15KHF	163	187	Not more than 540 (55)	No more 490 (50)	55
19KHGN	+	217	+	Not more than 690 (70)	+
15KHM	179	179		+
16KHSN	197	+	Not more than 640 (65)	Not more than 540 (55)	55
30KHMA	217	229	+	+	+
20KHGSA	197	207
30KHGSA	217	229	Not more than 690 (70)		Fifty seven
35HGSA	241	241	+		+
15KHGNM	+	217		No more 490 (50)	60
38KHGNM		+		Not more than 690 (70)
12ХНЗА	217	217		+	+
18KH2N4MA	269	269
25KH2N4MA	255
(25KH2N4VA)	269			Not more than 640 (65)	50
40KHN2MA (40HNMA)
30KHN2MFA				+	+

Notes:

1. The sign «+" means that the mechanical properties and the hardness is determined for the data formation and the test results indicate in the document about quality.

2. The hardness of calibrated round steel and cold drawn hexagonal sizes less than 5 mm determined by agreement between manufacturer and consumer.

Table 4

Steel grade	Hardness, HB, no more	Tensile strength , N/mm(kgf/mm)		Elongation , %	The relative narrowing , %
	Hot-rolled steel and hot rolled with special surface finish	not less than
		Steel nagarebana calibrated and calibrated with special surface finish
08KP, 08ps	131	179	370 (38)	8	60
08					55
10kp, 10ps	137
10		187	390 (40)		50
15kp, 15ps	143
15		197	440 (45)		45
20kp, 20ps	156		490 (50)	7
20		207			40
25	170	217	540 (55)
30	179	229	560 (57)
35	187		590 (60)	5
40	217	241	+	+	+
45	229
12KHN	-	210
19KHGN		269
15X, 20X		207	590 (60)	5	45
30S			+	+	+
35X, 40X		+	690 (70)	5	40
38KHA		207	+	+	+
15KHF, 40KHN
20G2		+	490−690 (50−70)
30KHGSA			490−740 (50−75)
16KHSN			440−640 (45−65)
30KHMA
15KHGNM			+

Notes:

1. The sign «+" means that the mechanical properties and the hardness is determined for the data formation and the test results indicate in the document about quality.

2. The hardness of calibrated round steel and cold drawn hexagonal sizes less than 5 mm determined by agreement between manufacturer and consumer.

3.4, 3.5. (Changed edition, Rev. N 1, 2).

3.6. The hot rolled size up to 30 mm, grooved, hot-rolled and calibrated with special surface finish size up to 28 mm should stand the test on a cold draught in accordance with table.5. In upset samples should be free of tears and cracks.

Table 5

Group precipitation	The amount of deformation at cold lees	A method of manufacturing	Delivery condition	Mark
50	To the initial height of the sample	HR	Without heat treatment	08ps, 08KP, 08, 10ps, 10kp, 10, 15, 15kp, 15ps, 20, 20kp, 20ps, 25, 30, 35, 40, 45, 50, 15X, 20X, 30S, 35X, 40X, 40KHN, 38KHA, 15G, 20G, 15KHF
		Calibrated	Full hard	08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 15X, 20kp, 20ps, 20, 25, 30, 35, 12KHN
		Hot-rolled grooved	Heat treated	10kp, 25, 30, 35, 40, 45, 50, 15X, 20X, 20kp, 25X, 30X, 35X, 40X, 45KH, 38KHA, 15G, 20G, 20G2, 40G, 45G, 35G2, 40G2, 38KHS, 12KHN, 40KHN, 50KHN, 15KHF, 16KHSN, 19KHGN, 15KHGNM, 30KHMA, 15KHM, 20KHGSA, 30KHGSA, 35HGSA, 12KHN3A, 18KH2N4MA, 25KH2N4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 38KHGNM, 30KHN2MFA
66	To the initial height of the sample	Hot-rolled and hot-rolled with special surface finish	Without heat treatment	08KP, 08ps, 08, 10kp, 10ps, 10, 15kp, 15ps, 15, 20kp, 20ps, 20, 15G
		Calibrated	Full hard	08KP, 10, 10kp, 15, 15X, 15kp, 20, 20kp, 25
		Calibrated hot-rolled, hot-rolled and calibrated with special surface finish	Heat treated	According to claim 3.1 and
66Т	To the initial height of the sample heat treated with a hardness in accordance with table.3	HR	Without heat treatment	20, 25, 30, 35, 40, 45, 50, 15X, 20X, 30X, 35X, 38XA, 40X, 45X, 20G, 40G, 45G, 20G2, 35G2, 40G2, 38KHS, 12KHN, 40KHN, 50KHN, 15KHF, 15KHM, 16KHSN, 19KHGN, 30KHMA, 12ХНЗА, 20KHGSA, 30KHGSA, 35HGSA, 15KHGNM, 38KHGNM, 18KH2N4MA, 25KH2N4MA, (25KH2N4VA), 40KHN2MA, (40HNMA), 30KHN2MFA
66И	To the initial height of the thermally treated and grinded sample			According to claim 3.1 and
75	To the initial height of the sample	Hot-rolled with special surface finish and calibrated with special surface finish	Heat treated	-
75И	To the initial height of the thermally treated and grinded sample	HR	Without thermal treatment and thermally treated

Notes:

1. Rental group precipitation 75 and 75И are made by agreement between manufacturer and consumer.

2. In the subsequent surface finishing of the consumer testing for deformation in cold sediment should be conducted to control heat-treated and machined samples. In this case, when the ordering of hot-rolled steel, you must specify designation 66И and 75И.

3. It is possible to supply hot-rolled steel without heat treatment in the group of precipitation is 75.


Tests on sediment cold rolled with a size of over 30 mm is not acceptance before 01.01.92. The test is compulsory.

3.7. The surface of hot-rolled steel should be smooth without cracks, prisoner, foreign inclusions, smoothed out bubbles, dirt and sunsets.

Permissible surface defects of steel are shown in table.6.

Table 6

			The defects allowed
Group over- ness	The name of the rental	Group precipitation	Name	The maximum depth of
1	For the manufacture of calibrated rolled (without special surface finishes)	50, 66 and 66Т	Prints, Rabina	Half of the dimension tolerance
			Some small risks	dimension tolerance, but not more than 0.1 mm for sections up to 20 mm and not more than 0.2 mm for cross sections of 20 mm and above
2	For the manufacture of hot rolled and calibrated with special surface finish rental	66И, 75 and 75И	Prints, rabiza, risk, rolled out small bubbles and contamination	The tolerance on size

3.8. The surface quality of the calibrated hire in accordance with the order must meet the requirements of groups A and B, GOST 1051.

The quality of rolled product surface with special surface finish should meet the requirements of groups A, B, C, D and e according to GOST 14955.

3.9. At the request of the enterprises of MISI is made of hot-rolled steel group 1 with the presence on the surface of separate small wooloowin with a maximum depth of not more tolerance on the size of the calibrated hire kvalitet h11 and calibrated rolled in groups according to GOST 1051.

3.7−3.9. (Changed edition, Rev. N 2).

3.10. (Deleted, Rev. N 1).

3.11. The macrostructure of the carbon steel when tested for the fractures treated or templete should not have shrinkage and looseness, blistering, delamination, cracks, inclusions and placenow visible without using the magnifying devices. In the macrostructure of rimming steel not permitted exudation square opening to the surface.

The macrostructure of alloy steel must meet the requirements of GOST 4543.

3.12. The size of the austenitic grain in the steel alloy should be not larger than 5 rooms.

3.12. The size of the actual grain in the rolling of steel grades 30, 35, 40, 45, 30S, 38KHA, 40X and 12KHN should be not larger than 5 rooms. Allowed the presence of single grains of number 4, if the relative area occupied by them on the cone does not exceed 20%.

(Added, Rev. N 2).

3.13. In the microstructure of hot-rolled heat-treated and calibrated rolled steel grades 30, 35, 40, 45, 12KHN, 30S, 38KHA, 40KHN2MA, 40H, 38KHGNM should not be grouplisting perlite.

3.14. Overall depth bezoperatsionnogo layer (ferrite+transition zone) of rolled steel grades with a mass fraction of carbon of 0.3% or more at the lower limit in the marches must not be more than 1.5% per side.

Depth bezoperatsionnogo layer of the thermally processed hot-rolled and calibrated with special surface finish of the rental should be not more than 0.05 mm rolled diameter up to 10 mm, 0.1 mm — for hire with a diameter of 10 to 20 mm and 0.5% for rental with a diameter greater than 20 mm.

For hot-rolled and calibrated with special surface finish rolled, not heat treated, decarburization is not allowed.

3.15. At the request of the consumer rental made:

a) calibrated with surface coatings (phosphating etc.);

b) with narrowed limits for the mass fraction of carbon with a run not less than 0.05%;

in) with a mass fraction of sulfur, not more than 0,025, 0,030 and 0,035%, phosphorus not more than 0,025%;

g) with the value bezoperatsionnogo layer in the hot rolled and calibrated with special surface finish (with a mass fraction of carbon of 0.3% and higher) is not more than 1.0% on the side;

d) determining the amount of the actual grain in the steel grades that are not listed in paragraph 3.12 a;

e) control of microstructure of the steel grades that are not listed in paragraph 3.13;

f) with a normalized purity steel non-metallic inclusions;

z) with a normalized purity alloy steel for foloowing in accordance with GOST 4543;

s) with control of mechanical properties on thermally treated samples;

K) control of the macrostructure of the fracture or etching, the five templates selected from different bars and coils;

l) with a normalized value of the segregated square in the macrostructure of boiling steel;

m) with grain size in the ferrite in the range of 5−7 rooms;

n) gauged, hot-rolled and calibrated with special surface finish rolling of steel grades with a mass fraction of carbon of 0.3% or more at the lower limit of the Marche with a normalized quantity of granular pearlite in the microstructure of the rental;

o) with a normalized distance value of the actual grain;

p) calibrated full hard rolled steel grades of 30 and 35 on group precipitation of 66.

Note. Standards in subparagraphs a, d, e, f, I, l and methods to control the microstructure and purity of steel by foloowing determined by agreement between manufacturer and consumer.

3.13−3.15. (Changed edition, Rev. N 2).

4. ACCEPTANCE RULES

4.1. Rods and reels take parties. The party must consist of bars and coils of steel in one melting, one size and one mode of heat treatment.

The party should be issued a single document on quality in accordance with GOST 7566.

(Changed edition, Rev. N 1, 2).

4.2. Dimensions and surface quality check on all the bars or coils.

4.3. To check the chemical composition of the selected sample according to GOST 7565.

4.4. To check the quality of hire from a selected batch:

— to control the hardness, macrostructure by fracture or etching, microstructure, determining the depth bezoperatsionnogo layer and tests on sediment — three bar or coil;

— for the determination of nonmetallic inclusions — two bar or coil;

— to control the mechanical properties of the two rod or coil.

(Changed edition, Rev. N 2).

4.5. If unsatisfactory test results of at least one of the indicators, repeat tests carried out in accordance with the requirements of GOST 7566.

5. TEST METHODS

5.1. Chemical composition is determined by GOST 12344*-12360 GOST, GOST 18895, GOST 22536.0 to GOST 22536.12, GOST 28473 or other methods providing the required accuracy.
_______________
* On the territory of the Russian Federation GOST 12344−2003. — Note the manufacturer’s database.

(Changed edition, Rev. N 1, 2).

5.2. The geometric dimensions and shape determined by means of measuring instruments according to the GOST 162, 166 GOST, GOST 427, GOST 3749, 5378 GOST, GOST 6507, GOST 7502, GOST 26877 or templates according to normative-technical documentation (NTD), and tools or templates, certified according to GOST 8.326* or GOST 2216.
________________
* On the territory of the Russian Federation PR 50.2.009−94**.
** In the territory of the Russian Federation to apply the Procedure of testing standard specimens or measurement facilities for the purposes of type approval, the Procedure for approval of type of standard samples or type of measuring instruments, the Procedure for issuing certificates on approval of type of standard samples or type of measuring instruments, establishment and changing of the validity period of these certificates and the interval between verifications of measuring instruments, Requirements to the signs of type approval for standard samples or type of measuring instruments and their application, approved by order of Minpromtorg of Russia of 30 November 2009 # 1081. — Note the manufacturer’s database.

(Changed edition, Rev. N 2).

5.3. The surface quality is checked visually in the stream or upon acceptance. If necessary, a bleaching or etching of the surface. Allowed to control the quality of the surface of the magnetic and other non-destructive methods.

5.4. To control hardness, mechanical properties, micro — and macrostructure, testing sediment and determine the depth bezoperatsionnogo layer from each test bar or coil are taken one by one test specimen of each type.

Sampling from the rod is carried out at a distance of not less than 150 mm from the bar end from the roll at a distance of not less than 1.5 m at a coil weight up to 250 kg and not less than 3,0 m at a mass skein over 250 kg.

(Changed edition, Rev. N 1).

5.5. Control of macrostructure of steel by etching or by type of fracture churchyard 10243 conduct or method of ultrasonic inspection according to the method of the manufacturer.

The manufacturer is allowed to check the macrostructure in the intermediate billet melting-ladle and the results of monitoring be extended to all of her laminated profiles and calibrated and calibrated with special surface finish rolling.

(Changed edition, Rev. N 2).

5.6. Sampling for mechanical test on a cold draught — GOST 7564.

5.7. The test sediment in a cold condition of hot-rolled steel up to 30 mm, grooved, hot-rolled and calibrated with special surface finish size up to 28 mm is carried out according to GOST 8817. Rental of steel grades 10, 15, 20, 20kp, and 25 group 66 cold-worked condition, fail the test sediment to subject to a repeated test to .

Rent with size over 30 mm feel the upsetting according to the method approved in the prescribed manner.

5.8. Control of mechanical properties is carried out according to GOST 1497 on samples of five times the round length with a diameter of 10 mm. is allowed to conduct tests on full-scale samples.

5.7, 5.8. (Changed edition, Rev. N 2).

5.9. Depth bezoperatsionnogo layer was determined by M according to GOST 1763.

5.10. The grain size is determined according to GOST 5639.

5.11. Assessment grouplisting perlite is carried out according to GOST 8233.

Evaluation of granular perlite is carried out according to agreed standards.

(Changed edition, Rev. N 2).

5.12. The hardness is determined according to GOST 9012.

5.13. Non-metallic inclusions is determined according to GOST 1778.

5.14. Allowed to apply non-destructive and statistical control methods according to the methods agreed in the prescribed manner.

6. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

6.1. Packing, marking, transportation and storage rolled produced as per GOST 7566 with the following additions: marking, packaging, transportation and storage of the calibrated hire must meet the requirements of GOST 1051, rolled with special surface finish GOST 14955.

Label, calibrated, and calibrated with special surface finish applied to hire additional letters «XB» (cold heading).

The outer diameter of a coil of hot-rolled steel should be not more than 1500 mm, the inner is not less than 180 mm.

Transportation can be done at indoor and outdoor vehicles of all types in accordance with the rules of cargo transportation applicable to the transportation of the species.

Weight of cargo must not exceed when mechanized loading into open vehicles is 10 tons, covered — 1,25 t.

When transporting in a single address two or more parcels, the dimensions of which allow it to form a transport package with dimensions according to GOST 24597, the package needs to be formed into transport packets according to NTD.

The uld (linkage stack) — according to GOST 7566.

(Changed edition, Rev. N 1, 2).



The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
High quality steel: Sat. Standards. -
M.: IPK Publishing house of standards, 2002