GOST 7350-77

GOST 7350-77

INTERSTATE STANDARD

THICK SHEET STEEL

CORROSION RESISTANT, HEAT RESISTANT

AND HEAT RESISTANT

TECHNICAL SPECIFICATIONS

Official edition

UDC 669.14-413:006.354 Group B33

INTERSTATE STANDARD

THICK SHEET STEEL CORROSION RESISTANT, HEAT RESISTANT AND HEAT RESISTANT Technical conditions Plate steel, corrosion-resistant, heat-resistant and high-temperature. Specifications ISS 77.140.20 OKP 09 8500, 09 8600

GOST 7350-77

Date of introduction 01.01.79

This standard applies to thick-sheet, hot-rolled and cold-rolled corrosion-resistant, heat-resistant and heat-resistant steel (hereinafter referred to as steel), manufactured in sheets.

1. CLASSIFICATION

1.1. Steel is divided into:

- according to the condition of the material and the quality of the surface into groups:

cold rolled, work-hardened - H1,

cold rolled semi-hardened - PN1,

cold rolled, heat treated, pickled or bright annealed - M2a,

M3a, M4a, M5a,

cold rolled heat treated - M5v,

hot rolled heat treated,

etched or after bright annealing - M2b, M3b, M4b, M5b,

hot rolled, heat treated, non-pickled - M5g,

hot rolled without heat treatment and not pickled - 5d;

- by rolling accuracy:

high precision - A,

normal accuracy - B;

- according to the type of edges:

trimmed - Oh,

unedged - NO;

- for deviation from flatness of sheets with tensile strength of 690 N/mm² (70 kgf/mm²) and less by:

particularly high flatness - PO,

high flatness - PV,

improved flatness - PU,

normal flatness - PN.

(Changed edition, Amendment No. 2).

1.2 It is permitted to manufacture thick sheet steel with a rolling accuracy higher than that specified in the order.

Official publication Reproduction prohibited

BUT

© Publishing House of Standards, 1997

© STANDARTINFORM, 2009

GOST 7350-77 P. 2

2. ASSORTMENT

2.1. Hot rolled thick sheet steel is produced with a thickness of 4 to 50 mm, cold rolled - from 4 to 5 mm.

2.2. The shape, dimensions and maximum deviations in dimensions of thick sheet steel must comply with the requirements:

- for hot rolled - GOST 19903;

- for cold-rolled - GOST 19904.

Hot rolled sheets with a thickness of more than 20 mm with a cut edge are manufactured by agreement between the manufacturer and the consumer.

Hot rolled sheets of increased rolling precision A are manufactured according to customer requirements.

(Changed edition, Amendment No. 2).

2.3. The deviation of sheets from flatness must correspond to that specified in Table 1.

Table 1

Tensile strength, N/mm² (kgf/mm²)	Deviation of sheets from flatness per 1 m of length, mm
	hot rolled	cold rolled
Up to 690 (70) incl.	According to GOST 19903 (PO, PV, PU, PN)	According to GOST 19904 (PO, PV, PU, PN)
Over 690 to 830 (over 70 to 85) incl.	15	25
St. 830 (85)	25	By agreement between the manufacturer and the consumer

Notes:

1. At the customer's request, hot-rolled sheets with a thickness of 4-5 mm are manufactured with particularly high flatness (PO), with a thickness of 6 mm and more - with increased (PV) and improved (PU) flatness.

2. By agreement between the manufacturer and the consumer, sheets with a thickness of more than 20 mm are manufactured without straightening. In this case, the deviation from flatness should not exceed 30 mm per 1 m of length.

3. For sheets in a heat-treated condition without etching, deviation from flatness is not standardized.

Examples of symbols

Cold-rolled steel, heat-treated, pickled, thick sheet, grade 12X18N10T, surface group M2a, high rolling accuracy, with cut edge, improved flatness, size 5×1250×2500 mm:

Sheet

The same, hot-rolled, heat-treated, pickled, thick sheet, grade 20X13, surface group M3b, with unedged edge, normal flatness, size 40×1400×3000 mm:

Sheet

(Changed edition, Amendment No. 2, 3).

3. TECHNICAL REQUIREMENTS

3.1. Thick sheet steel is produced in the following grades: 20X13, 09X16N4B, 12X13, 14X17N2, 08X13, 12X17, 08X17T, 15X25T, 07X16N6, 09X17N7U, 03X18N11, 03X17N14M3, 08X22N6T, 12X21N5T, 08X21N6M2T, 20X23N13, 08X18G8N2T, 15X18N12S4TYU, 10X14G14N4T, 12X17G9AN4, 08X17N13M2T, 10X17N13M2T, 10Х17Н13М3Т, 08Х17Н15М3Т, 12Х18Н9, 17Х18Н9, 12Х18Н9Т,

P. 3 GOST 7350-77

04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 03Х21Н21М4ГБ, 03Х22Н6М2, 03Х23Н6, 20Х23Н18, 12Х25Н16Г7AR, 06ХН28МДТ, 03ХН28МДТ, 15Х5М.

(Changed edition, Amendment No. 2, 3).

3.1a. Thick sheet steel is manufactured in accordance with the requirements of this standard according to the technological regulations approved in the established manner.

(Additionally introduced, Amendment No. 2).

3.2. The chemical composition of all grades of steel - according to GOST 5632, except for steel grade 15X5M, the chemical composition of which must comply with GOST 20072.

The chemical composition of steel grades 03X23N6 and 03X22N6M2 must correspond to Table 1a.

Table 1a

Steel grade	Mass fraction of elements, %
	Carbon	Silicon	Sulfur	Phosphorus	Manganese	Chromium	Nickel	Molybdenum
03Х23Н6	0.03	0.4	0.02	0.035	1.0 - 2.0	22.0 - 24.0	5.6 - 6.3	-
03Х22Н6М2	0.03	0.4	0.02	0.035	1.0 - 2.0	21.0 - 23.0	5.5 - 6.5	1.8 - 2.5

Notes:

1. The following deviations in the mass fraction are allowed in the finished rolled product: silicon +0.4%, sulfur +0.005%, nickel ±0.2%, chromium +0.5%.

2. In steel grade 03X22N6M2, an increase in the mass fraction of molybdenum of +0.2% is allowed.

3. The mass fraction of residual titanium is allowed to be no more than 0.05%, other residual elements - according to GOST 5632.

(Changed edition, Amendment No. 2).

3.3. The sheets must not contain any signs of shrinkage cavities, delamination, foreign inclusions or bubbles.

3.4. The mechanical properties of heat-treated sheets must comply with the standards specified in Table 2.

Table 2

Steel grade	Heat treatment mode	Temporary resist- σ in , N/mm² (kgf/mm²)	Yield strength σ t , N/mm² (kgf/mm²)	Relate- body lengthening- niye δ 5 , %	Impact strength, KCU, J/cm² (kgf m/cm²)
		not less than
15X5M	Annealing at 840-870 °C, air cooling	470 (48)	235 (24)	18	-
20X13	Normalization or hardening at 1000-1050 °C, air cooling, tempering at 680-780 °C, furnace or air cooling	510 (52)	375 (38)	20
	Annealing according to the manufacturer's regime	Not more than 750 (76)
14Х17Н2*	Annealing or tempering at 650-700 °C	By agreement between the manufacturer and the consumer
09Х16Н4Б	Annealing according to the manufacturer's regime	Not more than 1030 (105)	-	13	-
12X13	Quenching at 960-1020 °C, air cooling, tempering at 680-780 °C, air or furnace cooling	490 (50)	345 (35)	21
	Annealing according to the manufacturer's regime	Not more than 650 (66)	250 (25)	15

GOST 7350-77 P. 4

Continuation of table 2

Steel grade	Heat treatment mode	Temporary resist- σ in , N/mm² (kgf/mm²)	Yield strength σ t , N/mm² (kgf/mm²)	Relate- body lengthening- niye δ 5 , %	Impact strength, KCU, J/cm² (kgf m/cm²)
		not less than
08X13	Quenching at 960-1020 °C, cooling in water or air, tempering at 680-780 °C, cooling in air or with a furnace	420 (43)	295 (30)	23	-
	Annealing according to the manufacturer's regime	Not more than 650 (66)	250 (25)	15
12X17*	Annealing or tempering at 760-780 °C, air or furnace cooling	440 (45)	-	18
08Х17Т*	Annealing or tempering at 760-780 °C, air cooling
15X25T*	Annealing or tempering at 740-780 °C, cooling in water			14	20 (2)
08Х22Н6Т	Quenching at 1000-1050 °C, cooling in water	590 (60)	345 (35)	18	59 (6)
03Х23Н6	Quenching at 1030-1050 °C, cooling in water			25	-
12Х21Н5Т*	Quenching at 950-1050 °C, cooling in water or air	690 (70)	390 (40)	14
08Х21Н6М2Т	Quenching at (1050±25) °C, cooling in water	590 (60)	345 (35)	20	59 (6)
03Х22Н6М2	Quenching at 1030-1050 °C, cooling in water			25	-
20Х23Н13*	Quenching at 1030-1120 °C, cooling in water	570 (58)	-	35
10Х14Г14Н4Т	Quenching at 1050-1080 °C, cooling in water or air	590 (60)	245 (25)	40
12Х17Г9АН4*	Quenching at 1030-1100 °C, cooling in water	690 (70)	345 (35)
10Х17Н13М2Т	Quenching at 1030-1080 °C, cooling in water or air	530 (54)	235 (24)	37
08Х17Н13М2Т		510 (52)	196 (20)	40
10Х17Н13М3Т		530 (54)	235 (24)	37
08Х17Н15М3Т*		510 (52)	196 (20)	40
17Х18Н9	Quenching at 1080-1120 °C, cooling in water	590 (60)	265 (27)	35
12Х18Н9	Quenching at 1050-1120 °C, cooling in water or under a water shower	530 (54)	215 (22)	38
12Х18Н9Т	Quenching at 1030-1080 °C, cooling in water or air
08Х18Н10	Quenching at 1050-1100 °C, cooling in water or air	510 (52)	205 (21)	43
04Х18Н10		490 (50)	175 (18)	45

P. 5 GOST 7350-77

End of table. 2

Steel grade	Heat treatment mode	Temporary resist- σ in , N/mm² (kgf/mm²)	Yield strength σ t , N/mm² (kgf/mm²)	Relate- body lengthening- niye δ 5 , %	Impact strength, KCU, J/cm² (kgf m/cm²)
		not less than
12Х18Н10Т	Quenching at 1000-1080 °C, cooling in water or air	530 (54)	235 (24)	38	-
08Х18Н10Т		510 (52)	205 (21)	43
12X18N12T	Quenching at 1030-1080 °C, cooling in water or air	530 (54)	235 (24)	38
08Х18Н12Т	Quenching at 1030-1080 °C, cooling in water or air	510 (52)	205 (21)	43
08Х18Н12Б	Quenching at 1000-1100 °C, cooling in water or air			40
20Х23Н18	Quenching at 1030-1130 °C, cooling in water	540 (55)	265 (27)	35
03ХН28МДТ*	Quenching at 1040-1080 °C, cooling in water		215 (22)
12Х25Н16Г7АР*	Quenching at 1050-1150 °C, cooling in water or air	740 (75)	390 (40)	50
15Х18Н12С4ТЮ*	Quenching at 1020-1050 °C, cooling in water or air	690-930 (70-95)	345 (35)	30
07Х16Н6	Normalization at (1040±10) °C, air cooling	Not more than 1180 (120)	No more than 390 (40)	15
03Х21Н21М4ГБ*	Quenching at 1060-1120 °C, cooling in water or under a water shower	590 (60)	295 (30)	30
08Х18Г8Н2Т	Quenching at 980-1020 °C, cooling in water or under a water shower		345 (35)	20	59 (6)
09Х17Н7Ю	Quenching at 1030-1070 °C, air cooling, double first tempering at 740-760 °C, air or water cooling, second tempering at 580-680 °C, air cooling	830 (85)	No more than 735 (75)	12	49 (5)
06ХН28МДТ	Quenching at 950-1080 °C, cooling in water	540 (55)	215 (22)	35	-
03Х18Н11	Quenching at 1080-1100 °C, cooling in water or air	490 (50)	196 (20)	40
03Х17Н14М3	Quenching at 1080-1100 °C, cooling in water or air

* For sheets with a thickness of over 25 mm, mechanical properties are not standardized; determination is mandatory.

Note. Annealing of sheets of steel grades 20X13, 12X13, 08X13 is carried out at the customer's request. Standards are not mandatory until 01.01.94. Definition is mandatory for the data set.

(Changed edition, Amendment No. 2,3).

GOST 7350-77 P. 6

3.5. The mechanical properties of sheets, determined on control heat-treated samples, must comply with the standards specified in Table 3.

Table 3

Steel grade	Heat treatment mode of samples	Temporary resist- σ in , N/mm² (kgf/mm²)	Yield strength σ t , N/mm² (kgf/mm²)	Relate- body lengthening- niye δ 5 , %	Impact strength, KCU, J/cm² (kgf m/cm²)
		not less than
14Х17Н2	Quenching at 960-1050 °C, cooling in water or air, tempering at 275-350 °C, cooling in air	1080 (110)	885 (90)	10	-
09Х16Н4Б	Quenching at 950-980 °C, air cooling, tempering at 300-350 °C, air cooling	1230 (125)	980 (100)	8
07Х16Н6	Normalization at (975±10) °C, cold treatment at -70 °C for 2 h, tempering at (425±10) °C 1 hour, air cooling	1080 (110)	835 (85)	10

Note: By agreement between the manufacturer and the consumer, it is permissible to change the heat treatment mode with a corresponding change in the mechanical property standards.

(Changed edition, Amendment No. 2).

3.6. Mechanical properties of cold-worked and semi-cold-worked sheets are not standardized, but are determined without fail. Standards are established by agreement between the manufacturer and the consumer.

3.7. In terms of appearance and surface quality, the sheets must meet the requirements specified in Table 4.

Table 4

Group believe- hnosti	Conventional designation of the group	Material condition	Surface characteristics	Name of permissible surface defects	Maximum depth of defects
1	H1 PN1	Hardened (H) and semi-hardened (PN)	Shiny, without bubbles, bulges, rolled bubbles, film, ripples, overetching, with a slight difference in shades	Scratches, nicks, marks, scratches, rolled marks	½ of the sum of the maximum deviations in thickness
2	M2a	a) Cold rolled, heat treated, pickled or bright annealed	Silvery-matte or shiny, without bubbles, rolled bubbles, film, cracks, scale and overetching	Ripples, scratches, nicks, marks, risks, rolled marks The same goes for shells.	Depth that does not take the sheet beyond the maximum deviations
	M2b	b) Hot rolled. heat treated, pickled or bright annealed

P. 7 GOST 7350-77

End of table. 4

Group believe- hnosti	Conventional designation of the group	Material condition	Surface characteristics	Name of permissible surface defects	Maximum depth of defects
3	M3a	a) Cold rolled, heat treated or annealed	Silvery-matte or shiny, without bubbles, rolled bubbles, film, cracks, scale and overetching	Ripples, scratches, marks, nicks, risks, rolled marks The same goes for shells.	½ of the sum of the maximum deviations in thickness
	M3b	b) Hot rolled. heat treated, pickled or bright annealed
4	M4a	a) Cold rolled, heat treated, pickled or bright annealed		Ripples, scratches, marks, nicks, risks, rolled marks The same goes for shells.	Sum of maximum deviations in thickness
	M4b	b) Hot rolled. heat treated, pickled or bright annealed
5	M5a	a) Hot rolled. heat treated, pickled or bright annealed	Matte with a gray tint or shiny, without bubbles, rolled bubbles, cracks, scale and overetching	Ripples, scratches, marks, nicks, risks, small rolling films, rolled out marks The same goes for shells.
	M5b	b) Hot rolled. heat treated, pickled or bright annealed
	M5v	c) Cold rolled, heat treated	Dark	Ripples, scratches, marks, nicks, risks, small rolling films, rolled marks, scale
	M5g	d) Hot rolled. heat treated		Ripples, scratches, marks, nicks, risks, small rolling films, cavities, rolled prints, scale
	5d	d) Hot rolled. unheat treated and unetched

Notes:

1. Requirements for the quality of the surface of heat-treated steel in terms of the number and nature of defects may be specified by agreement of the parties using standards.

2. Local shallow cleaning of the surface is allowed, but the depth of cleaning should not exceed the depth standards of acceptable defects. Burns from cleaning are not allowed.

3. At the customer's request, sheets are manufactured without stripping or cutting out unacceptable defects.

4. Temper colours and various shades from etching on cold-rolled and hot-rolled heat-treated sheets, etched or after bright annealing, are not a rejection feature.

5. Welding of defects on sheets is permitted by agreement with the consumer.

(Changed edition, Amendment No. 2).

GOST 7350-77 P. 8

3.8. Sheets made of steel grades 09Х17Н7Ю, 03Х18Н11, 03Х17Н14М3, 08Х22Н6Т, 08Х21Н6М2Т, 10Х14Г14Н4Т, 12Х17Г9АН4, 08Х17Н13М2Т, 10Х17Н13М2Т, 10Х17Н13М3Т, 08Х17Н15М3Т, 12Х18Н9, 12Х18Н9Т, 04Х18Н10, 08Х18Н10, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н12Т, 12Х18Н12Т, 08Х18Н12Б, 08Х18Г8Н2Т, 03Х21Н21М4ГБ, 03Х22Н6М2, 03Х23Н6, 06ХН28МДТ, 03ХН28МДТ should not have a tendency to intercrystalline corrosion.

The intercrystalline corrosion standards for steel grades 03Kh22N6M2 and 03Kh23N6 are not mandatory until 01.01.93. The definition is mandatory for the data set.

(Changed edition, Amendment No. 2, 3).

3.9. At the customer's request, sheets are manufactured with standardization:

a) the tendency of 12X21N5T steel to embrittlement. The heat treatment mode and standards must correspond to those specified in Table 5;

b) surface roughness of hardened and semi-hardened steel;

c) alpha phases in austenitic steels;

d) tendency to intercrystalline corrosion for steel grades not specified in GOST 6032;

d) impact toughness of steels for which impact toughness is not indicated in Table 2;

e) grain size;

g) mechanical properties of hot-rolled sheets supplied without heat treatment and pickling;

c) mechanical properties at elevated temperatures;

i) contamination of steel with non-metallic inclusions;

k) mechanical properties other than those specified in Table 2.

Note. Standards for subparagraphs b, c, d - k, as well as control methods for subparagraphs c, d are established by agreement between the manufacturer and the consumer.

Table 5

Heat treatment mode	Sheet thickness, mm	Sample type	Impact strength, KCU, J/cm² (kgf m/cm²), not less than
Heating to 550 °C, holding for 1 hour, cooling with a furnace at a rate of 100 °C/h to 300 °C, then cooling in air	Up to 10	VIII according to GOST 6996	39 (4.0)
	St. 10	I according to GOST 9454	29 (3.0)

3.10. At the customer's request, sheets are manufactured:

a) with testing of the susceptibility to intercrystalline corrosion of steel grades 08X17T, 15X25T and 07X16N6;

b) with testing of internal defects by non-destructive methods. Standards are established by agreement between the manufacturer and the consumer;

c) without mechanical or other tests, provided that the standards established in this standard are met;

d) with control of the hardness of heat-treated sheets;

d) with bending test.

(Changed edition, Amendment No. 2, 3)

4. ACCEPTANCE RULES

4.1. Sheet steel is accepted in batches. A batch must consist of metal from the same melt, the same material condition, the same thickness, and for heat-treated steel - the same heat treatment mode. Sheets differing in thickness by no more than 40% for sheets 4 to 12 mm thick, and by no more than 5 mm for sheets over 12 mm thick may be combined into one batch.

By agreement between the manufacturer and the consumer, batches consisting of several melts of the same grade or one melt of sheets of different thicknesses are permitted.

(Changed edition, Amendment No. 3).

P. 9 GOST 7350-77

4.1.1. Each batch must be accompanied by a quality document in accordance with GOST 7566 with additional results:

- testing the mechanical properties of work-hardened and semi-work-hardened sheets and sheets with a thickness of over 25 mm;

- testing sheets made of steel grades 03X22N6M2 and 03X23N6 for susceptibility to intercrystalline corrosion;

- checking sheets for internal defects;

- hardness control.

(Additionally introduced, Amendment No. 2).

4.2. All sheets in a batch are subject to surface, flatness and dimensional control.

The manufacturer is allowed to control deviations from flatness and dimensions of sheets selectively, but not less than on one sheet of each thickness in the batch.

4.3 To check the quality of the sheets, the following are selected:

- for tensile testing, determination of impact strength, grain size and surface roughness - one sheet per batch;

- to determine the susceptibility to intercrystalline corrosion - according to GOST 6032;

- to determine the contamination of steel with non-metallic inclusions - according to GOST 1778;

- to check the chemical composition - according to GOST 7565.

To check mechanical properties, susceptibility to intercrystalline corrosion, contamination with non-metallic inclusions and grain size, it is permissible to select the sheet of the greatest thickness from a batch consisting of sheets of different thicknesses and the same heat treatment regime.

4.4. If unsatisfactory test results are obtained for at least one of the indicators, repeat tests are carried out on a sample selected in accordance with GOST 7566.

5. TEST METHODS

5.1. Sampling for determination of the chemical composition of steel - according to GOST 7565. The chemical composition is determined according to GOST 12344 - GOST 12365, GOST 28473 or other methods that ensure the required accuracy of analysis.

5.2. The surface quality is checked without the use of magnifying devices.

5.3. Measurements of sheet thickness and deviations from flatness are carried out in accordance with GOST 19903 and GOST 19904. The dimensions and shape of the sheets are checked with a measuring instrument that ensures the required measurement accuracy.

5.4. The selection and preparation of samples for mechanical testing is carried out in accordance with GOST 7564 across the rolling direction, and for steel grade 09Kh17N7Yu - along the rolling direction.

From each control sheet the following is selected:

- for tensile testing and determination of surface roughness - one sample each;

- to determine impact strength and grain size - two samples.

5.5. Tensile testing at room temperature is carried out in accordance with GOST 1497, at elevated temperature - in accordance with GOST 9651 on short samples.

(Changed edition, Amendment No. 2).

5.6. Impact strength is determined only for sheets with a thickness of 11 mm or more according to GOST 9454 on type 1 samples.

5.7. Surface roughness is determined in accordance with the requirements of GOST 2789 using a profilograph-profilometer in accordance with GOST 19300 or by comparison with working samples.

(Changed edition, Amendment No. 2).

5.8. Contamination of steel with non-metallic inclusions is checked according to GOST 1778.

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

5.10. Testing of steel for susceptibility to intercrystalline corrosion is carried out in accordance with GOST 6032.

Sheets without heat treatment are not tested for susceptibility to intercrystalline corrosion.

If unsatisfactory test results are obtained using the AMU and VU methods, by agreement between the manufacturer and the consumer, repeated tests may be carried out using the B method.

GOST 7350-77 P. 10

Testing of steel grades 03X23N6 and 03X22N6M2 for susceptibility to intercrystalline corrosion is carried out using the DU method in accordance with GOST 6032.

Sheets of steel grade 03X22N6M2 are tested in the hardened state, and those of steel grade 03X23N6 are tested in the hardened state and subsequently tempered at 550 °C for 1 hour.

(Changed edition, Amendment No. 1, 2).

5.11. The absence of internal defects in sheets, as specified in paragraph 3.3, is ensured by the technology of steel and sheet production.

Control is carried out visually on the edges of the sheets.

Ultrasonic testing of internal defects is carried out at the request of the consumer in accordance with regulatory and technical documentation (RTD).

(Changed edition, Amendment No. 2).

5.12. To test mechanical properties and the absence of a tendency to intercrystalline corrosion, it is permissible to use statistical control methods approved in the established manner.

5.13. Hardness determination is carried out according to GOST 9012 on blanks for the production of tensile samples.

5.14. The bending test is carried out in accordance with GOST 14019.

5.13, 5.14. (Introduced additionally, Amendment No. 2).

6. PACKAGING, MARKING, TRANSPORTATION AND STORAGE

6.1. Packaging, marking, transportation and storage - according to GOST 7566.

(Changed edition, Amendment No. 2).

6.2. (Excluded, Amendment No. 2).

6.3. When packing sheets into bundles, each bundle must consist of sheets from the same batch. It is allowed to pack sheets from different batches made from the same heat into one bundle. In this case, the batches must be separated by spacers. It is allowed to strap bundles of hot-rolled unetched sheets with transverse strapping in an amount equal to the sum of the longitudinal and transverse strapping provided for by GOST 7566. In this case, there must be no shifting of sheets in bundles during transportation. Instead of marking the top sheet of the bundle, it is allowed to apply marking to a metal card of at least 200×290 mm in size, securely attached in at least two places to the packing tape on the top of the bundle.

APPENDIX. (Deleted, Amendment No. 1).

P. 11 GOST 7350-77

INFORMATION DATA

1. DEVELOPED AND SUBMITTED BY the USSR Ministry of Ferrous Metallurgy
2. APPROVED AND PUT INTO EFFECT by the Resolution of the State Committee for Standards of the Council of Ministers of the USSR dated 21.07.77 No. 1786
3. INTRODUCED FOR THE FIRST TIME
4. The standard fully complies with ST SEV 6434-88
5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

Designation of the NTD to which the reference is given	Item number	Designation of the NTD to which the reference is given	Item number
GOST 1497-84 GOST 1778-70 GOST 2789-73 GOST 5632-72 GOST 5639-82 GOST 6032-2003 GOST 6996-66 GOST 7564-97 GOST 7565-81 GOST 7566-94 GOST 9012-59 GOST 9454-78 GOST 9651-84 GOST 12344-2003 GOST 12345-2001 GOST 12346-78 GOST 12347-77 GOST 12348-78 GOST 12349-83 GOST 12350-78 GOST 12351-2003	5.5 4.3, 5.8 5.7 3.2 5.9 3.9, 4.3, 5.10 3.9 5.4 4.3, 5.1 4.1.1, 4.4, 6.1, 6.3 5.13 3.9, 5.6 5.5 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1	GOST 12352-81 GOST 12353-78 GOST 12354-81 GOST 12355-78 GOST 12356-81 GOST 12357-84 GOST 12358-2002 GOST 12359-99 GOST 12360-82 GOST 12361-2002 GOST 12362-79 GOST 12363-79 GOST 12364-84 GOST 12365-84 GOST 14019-2003 GOST 19300-86 GOST 19903-74 GOST 19904-90 GOST 20072-74 GOST 28473-90	5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.14 5.7 2.2, 2.3, 5.3 2.2, 2.3, 5.3 3.2 5.1

1. The validity period limitation was lifted according to protocol No. 3-93 of the Interstate Council for Standardization, Metrology and Certification (IUS 5-6-93)
2. EDITION (November 2009) with Amendments No. 1, 2, 3, approved in November 1987, June 1988, October 1989 (IUS 2-88, 11-88, 2-90)