Name of steel

Mass fraction element, %

carbon, no more

manganese

sulfur, no more

other elements

No more than 0.60

No more than 0.05

No more than 0.040

No more than 0.30

No more than 0.65

No more than 0.040

No more than 0.30

No more than 0.65

No more than 0.040

No more than 0.30

No more than 0.040

No more than 0.30

No more than 0.040

No more than 0.30

No more than 0.80

No more than 0.035

No more than 0.30

Aluminum
0,08-0,15

No more than 0.60

No more than 0.035

No more than 0.40

No more than 0.30

Nitrogen
0,015-0,025

No more than 0.17

No more than 0.035

No more than 0.30

No more than 0.60

No more than 0.035

No more than 0.40

No more than 0.30

Nitrogen
0,015-0,025

No more than 0.035

No more than 0.30

Molybdenum

No more than 0.035

No more than 0.30

Molybdenum

Aluminum

2.4. Rolled products from steel C255 with a mass fraction of manganese 0.8-1.1% and silicon 0.15-0.30% are made with a thickness of more than 30 mm, from steel C285 of the same chemical composition - with a thickness of at least 16 mm.

2.5. At the request of the consumer, the mass fraction of copper in steel S345, S375, S390, S440 should be 0.15-0.30%, while the letter D is added to the designation of steel, for example S345D.

2.6. It is allowed to produce rolled sheets of steel C390 with the chemical composition of steel C345 by the method of thermal improvement with special heating, as well as by the method of thermal hardening with rolling heating to produce shaped steel with a flange thickness of up to 12 mm inclusive of steel C345 and C375 with the chemical composition of steel C245 and C255.

The letter T is added to the designation of steel, for example: S390T S390DT, S345T-2, S345T-1.

2.7. The mass fraction of nitrogen in steel, except steel S390, S390K, S440 and S590K, should be no more than 0.008%, and when smelting in electric furnaces - no more than 0.012%.

Mass fraction of arsenic - no more than 0.08%.

When smelting steel from Kerch ores, the mass fraction of arsenic is no more than 0.15%, while in steel C345, C375, C390, C440, C590 and C590K the mass fraction of phosphorus should be no more than 0.030%.

2.8. The mass fraction of residual (acid-soluble) aluminum in steel C255 and C285 with a mass fraction of manganese up to 0.85% and silicon 0.15-0.30%, intended for sheet and wide-band universal rolled products, must be at least 0.20%.

For steel C345, the addition of aluminum and titanium is allowed in order to obtain a mass fraction of titanium in rolled products of 0.01-0.03%.

2.9. At the consumer's request, in steel S345, S375, S390, S390K and S440, the mass fraction of phosphorus should be 0.030%, sulfur - no more than 0.035%.

2.10. It is allowed to treat steel with synthetic slags, vacuum degassing, blowing with argon, modifying steel with calcium and rare earth elements based on the introduction of no more than 0.02% calcium and 0.05% rare earth elements into the metal.

2.11. When processing steel S590K with synthetic slags with a mass fraction of sulfur in the steel of no more than 0.015%, a mass fraction of residual titanium of up to 0.040% and a mass fraction of copper of up to 0.50% are allowed; when the mass fraction of sulfur is more than 0.015%, the mass fraction of residual titanium is allowed up to 0.030%.

2.12. When producing S590K steel using the electroslag remelting method, the letter Ш-С590КШ is added to the steel designation. The mass fraction of sulfur in S590KSh steel should be no more than 0.010%, phosphorus - no more than 0.020%.

2.13. Maximum deviations in chemical composition in finished rolled products from the standards must comply.

Item name	Maximum deviations by mass fraction of elements, %, rolled steel


Manganese

Note. In rolled steel S345K, the maximum deviation for the mass fraction of phosphorus is +0.03%, for steel S590 and S590K - the maximum deviation for the mass fraction of molybdenum is ±0.02%, for steel S345K in S590K - the maximum deviation for the mass fraction of aluminum is .+ 0.02%.

2.13.1. Chemical analysis of steel is allowed for the content of chromium, nickel (except steel S345K and S590K), copper (except steel S345K, S345D, S375D, S390D, S390K and S440D), arsenic and nitrogen (except steel S390, S390K, S440 and S590), aluminum (except for steel S345K and S590K), and in steel S235 also silicon and in steel S590K titanium should not be carried out by the manufacturer. Required chemical composition guaranteed by the consumer. In steel smelted from Kerch ores, determination of arsenic is mandatory.

2.13.2. It is permissible for the manufacturer not to carry out a chemical analysis of the finished rolled products. The established standards are guaranteed by the manufacturer.

2.14. Rolled products are produced in a hot-rolled state. To ensure the required properties, the use of heat treatment is allowed.

Sheets from steel S390, S390K and S440 are produced in a normalized or improved condition, sheets from steel S590 and S590K are produced in an improved condition.

Name of steel

Thickness,
shelves, mm

Mechanical characteristics

Bend up

Parallel-

ties of the parties

(A- sample thickness, d- diameter

Relative extension , %

at temperature, °C

mechanical aging

From 4 to 20 incl.

d=a

From 20 to 40 incl.

d=2a

From 4 to 20 incl.

d=a

From 20 to 25 incl.

d=2a

From 25 to 30 incl.

d=2a

From 4 to 10 incl.

d=a

St. 10 to 20 incl.

d=a

From 20 to 40 incl.

d=2a

From 4 to 10 incl.

d=a

St. 10 to 20 incl.

d=a

From 4 to 10 incl.

d=a

St. 10 to 20 incl.

d=a

From 4 to 10 incl.

d=2a

St. 10 to 20 incl.

d=2a

From 20 to 40 incl.

d=2a

From 4 to 10 incl.

d=2a

From 4 to 10 incl.

d=2a

St. 10 to 20 incl.

d=2a

From 20 to 40 incl.

d=2a

Name of steel	shelves, mm	Mechanical characteristics			Bend up parallel- style of the parties (A- sample thickness, d- diameter	Impact strength KCU, J/cm2 (kgf m/cm2)
		Yield strength, N/mm2 (kgf/mm2)	Tensile strength, N/mm2 (kgf/mm2)	Relative extension , %		at temperature, °C
		Yield strength, N/mm2 (kgf/mm2)	Tensile strength, N/mm2 (kgf/mm2)	Relative extension , %			mechanical aging

					d=a
	St. 4 to 40 incl.				d=1,5a
	From 20 to 40 incl.				d=2,0a
	Over 40 to 100 incl.				d=2,0a
					d=2,5a
	From 2 to 3.9 incl.				d=a
	From 4 to 10 incl.				d=1,5a
	St. 10 to 20 incl.				d=1,5a
					d=1,5a
	From 4 to 10 incl.				d=1,5a
	St. 10 to 20 incl.				d=1,5a
	From 20 to 40 incl.				d=2,0a
	From 2 to 3.9 incl.				d=1,5a
	From 4 to 10 incl.				d=1,5a
	St. 10 to 20 incl.				d=1,5a
					d=1,5a
	From 4 to 10 incl.				d=1,5a
	St. 10 to 20 incl.				d=1,5a
					d=2a
	From 4 to 10 incl.				d=2a
	St. 10 to 20 incl.				d=2a
	From 20 to 40 incl.				d=2a
	Over 40 to 60 inclusive.				d=2a
	Over 60 to 80 inclusive.				d=2a
	St. 80 to 160 incl.				d=2a
	From 4 to 50 incl.				d=2a
					d=2a
	From 4 to 10 incl.				d=2a
	St. 10 to 20 incl.				d=2a
	From 20 to 40 incl.				d=2a
	From 4 to 50 incl.				d=2a
	From 4 to 30 incl.				d=2a
	From 4 to 30 incl.				d=2a
	Over 30 to 50 incl.				d=2a
	From 10 to 36 incl.				d=3a
	From 10 to 40 incl.				d=3a

The need for ultrasonic testing and the continuity class are indicated in the order.

2.18. The weldability of steel is guaranteed by the manufacturer.

At the consumer's request, carbon equivalent ( WITH e) should be no more than 0.49% for steel S390 and S390K, and no more than 0.51% for steel S440.

2.19. Mechanical tensile properties, impact strength, as well as bending test conditions must meet the requirements for shaped rolled products, sheet and broadband universal -.

2.24. Rolled steel C345 and C375 are manufactured in categories 1, 2, 3 and 4, depending on the requirements for impact bending tests. Standardized impact strength indicators for rolled steel C345 and C375 of various categories specified in the order are given in.

Normalized

characteristic

Impact strength at:

Impact strength after mechanical aging

(Changed edition. Amendment No. 1).

2.28.1. Marking of shaped steel made of steel C235, C245, C255, C275, C285, C345 and C375 is carried out with indelible paint, using the colors given in.

3. ACCEPTANCE

3.1. Rentals are accepted in batches. The batch must consist of rolled products of the same size, one melting ladle, and for heat-treated rolled products - one heat treatment mode.

3.2. The batch must be accompanied by a quality document in accordance with GOST 7566 -81, GOST 14637 -79, GOST 16523 -70 for rolled sheets, GOST 535 -88 for shaped rolled products, GOST 11474 -76 for bent steel profiles with additions:

rental symbol;

method of processing steel in a ladle (if there is processing);

values of acceptance numbers for two and six tests, determined in accordance with the application;

impact strength values for samples with a type V concentrator at a temperature of minus 40 °C;

continuity class of rolled sheets during ultrasonic testing.

(Changed edition. Amendment No. 1).

3.4. The sample volume for checking surface quality and dimensions is in accordance with GOST 14637 -79, GOST 16523 -70, GOST 535 -88, for ultrasonic testing of the continuity of rolled sheets - in accordance with GOST 14637 -79.

(Changed edition. Amendment No. 1).

3.5. The manufacturer carries out bending tests on shaped steel up to 20 mm thick on every twentieth batch.

3.6. If unsatisfactory test results are obtained for bending, impact strength, and when monitoring surface quality and dimensions, repeated tests are carried out on a sample selected in accordance with GOST 7566-81.

If unsatisfactory test results are obtained for yield strength, tensile strength and relative elongation, repeated tests are carried out on a sample selected in accordance with Appendix.

The test results apply to the entire batch.

If unsatisfactory test results are obtained during ultrasonic testing, the manufacturer conducts tests on each sheet of the batch.

CONTROL METHODS

(Changed edition. Amendment No. 1).

In case of disagreement, six samples selected randomly according to GOST 18321-73 are tested.

In addition, the impact strength of rolled sheets made of steel S390, S390K, S440, S590 and S590K at a temperature of minus 40°C is determined on samples of type 11, cut transverse to the rolling direction.

(Changed edition. Amendment No. 1).

5.1.1. By rail, rolled products are transported on platforms and in gondola cars. Type of dispatch - wagon.

ANNEX 1

Information

Brands according to current regulatory and technical documentation

Name of steel	Brands according to current standards
Name of steel	steel grade	Standard designation



	St3Gps, St3Gsp

	St3sp, St3Gps,

(Changed edition. Amendment No. 1).

APPENDIX 2 Obligated sprucenew

DIAGRAMS AND EXAMPLES OF RENTAL SYMBOLS

Equal flange rolled products, standard rolling accuracy (B), dimensions 75´75´6 mm according to GOST 8509-86, made of steel C245 according to GOST 27772-88.

as well as the difference ( h) between and normative value ( WITH), given in both the standard.

Magnitude h for yield strength and tensile strength must be at least 1.64 S. If this condition is not met for any samples, then the production of this type of rolled product according to this standard is not allowed.

For subsequent use, the value S0 is accepted, obtained as the arithmetic mean of sample standard deviations in the tested batches, calculated using the formula ().

If for the yield strength and tensile strength the obtained value S0 is less than 10 N/mm2 (1 kgf/mm2), S0=10 N/mm2 (1 kgf/mm2) is accepted.

3. Assessing the compliance of the mechanical properties of batches of sheet, wide and shaped rolled products with the requirements of the standard

3.1. The mechanical properties of a batch of rolled products are assessed based on the results of a distance test of two samples ( n=2). The arithmetic average values () of these results for the yield strength, tensile strength and relative elongation must be no less than the corresponding values of acceptance numbers (), determined by the formula

In this case, the values of tensile strength when testing each of the samples of a batch of rolled steel specified in the standard should be no more than WITH+180 (N/mm2).

3.2. If, when tensile testing two samples, the requirement of this annex is not met for at least one of the characteristics, then four more samples taken from four different sheets or rods are tested. The test results are considered satisfactory if the yield strength, tensile strength and relative elongation are not less than n=6.

If it is necessary to form a sample, the results of the first two tests are used.

In this case, the values of tensile strength when testing each of the four samples of a batch of rolled steel specified in paragraph of the standard should not exceed the value WITH+180 (N/mm2).

3.3. For steels S235, S215, S255, S275, S285, S345, S275, the mechanical properties of rolled batches can be assessed using regression equations in accordance with OST 14-34-78.

3.4. When statistically assessing the compliance of the mechanical properties of a batch of rolled products with the requirements of the standard using regression equations, the minimum number of batches subjected to direct tensile tests is set depending on the smaller of the parameter values Z, calculated for the yield strength, tensile strength and elongation using the formula

(5)

At Z³2.0 - at least one out of 10 batches is tested;

at 1.6 £Z<2,0 - испытывается не менее одной из 5 партий;

at Z<1,6 - испытывается каждая партия.

3.5. Assessing the reliability of predicting mechanical properties using regression equations using control charts and monitoring the stability of rolled product quality is carried out in accordance with OST 14-34-78.

GOST 27772-88

UDC 669.14-122:006.354 Group B20

STATE STANDARD OF THE USSR UNION

RENTAL FOR BUILDING STEEL STRUCTURES

General technical conditions

Rolled products for structural steel constructions.

General specifications

OKP 092500, 093000, 097000, 112000

Valid from 01/01/89

until 01/01/99*

INFORMATION DATA

1. DEVELOPED by the USSR Ministry of Ferrous Metallurgy, the USSR State Construction Committee, the USSR Ministry of Montazhspetsstroy, the Ukrainian Academy of Sciences

INTRODUCED by the USSR Ministry of Cherry and Metallurgy

DEVELOPERS

D.K. Nesterov; S.I. Rudyuk, Ph.D. tech. sciences; V.F. Kovalenko; E.I. Feldman (supervisors of the work), Ph.D. tech. sciences; L.F. Kuznetsov (responsible executive); J.M. Roeva, Ph.D. econ. sciences; I.N. Dryukova, Ph.D. tech. sciences; Yu.S. Tomenko, Ph.D. tech. sciences; L.V. Klimova; V.G. Ababkov, Ph.D. tech. sciences; V.D. Khromov, Yu.N. Semenov (supervisors of the work), Ph.D. tech. sciences; L.V. Meandrov, Doctor of Engineering. sciences; G.E. Sharonov (responsible executor), Ph.D. tech. sciences; V.P. Poddubny; V.M. Gorpinchenko, Doctor of Engineering. sciences; M.R. Uritsky (work leader), Ph.D. tech. sciences; P.D. Odessky (responsible executor), Doctor of Technical Sciences. sciences; L.I. Gladshtein (supervisor), Ph.D. tech. sciences; V.S. Kustanovich (responsible executive); K.V. Lyalin, Ph.D. tech. sciences; V.V. Malov (supervisor), Ph.D. tech. sciences; P.G. Samoilov (responsible executor), Ph.D. tech. sciences; THEM. Polyakova; L.M. Lobanov, Doctor of Engineering. sciences; A.E. Asnis, Doctor of Engineering. sciences; V.V. Pavlov (supervisor), Ph.D. tech. sciences

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee on Standards dated June 30, 1988 No. 2564

3. Introduced for the first time

4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

	Number of clause, subclause, enumeration, appendix

	Annex 1
	2.15, 2.27, 3.2, 5.1
GOST 1497-84
GOST 5521-86
GOST 7268-82
GOST 7511-73
GOST 7564-73
GOST 7565-81
GOST 7566-81	2.28, 3.2, 3.6, 5.1
GOST 8239-72	1.2, appendix 2
GOST 8240-72	1.2, appendix 2
GOST 8278-83
GOST 8281-80
GOST 8282-83
GOST 8283-77
GOST 8509-86	1.2, appendix 2
GOST 8510-86	1.2, appendix 2
GOST 8568-77
GOST 8706-78
GOST 9234-74
GOST 9454-78
GOST 10551-75
GOST 11474-76
GOST 12346-78
GOST 12347-77
GOST 12348-78
GOST 12350-78
GOST 12351-81
GOST 12352-81
GOST 12355-78
GOST 12356-81
GOST 12357-84
GOST 12358-82
GOST 12359-81
GOST 12361-81
GOST 12364-84
GOST 13229-78
GOST 14019-80
GOST 15635-79
GOST 14637-79	2.15, 2.27, 3.2, 5.1
GOST 15467-79	Appendix 3
GOST 15895-77	Appendix 3
GOST 16504-81	Appendix 3
GOST 16523-70	2.15, 2.27, 3.2, 5.1
GOST 17745-72
GOST 18895-81
GOST 19282-73	Annex 1
GOST 19425-74
GOST 19771-74
GOST 19772-74
GOST 19903-74	1.2, 2.16, Appendix 2
GOST 20560-81
GOST 22536.0-87
GOST 22536.1-88
GOST 22536.2-87
GOST 22536.3-88
GOST 22536.5-87
GOST 22536.6-88
GOST 22536.8-87
GOST 22536.9-88
GOST 22536.10-88
GOST 22536.11-87
GOST 22536.12-77
GOST 22727-88
GOST 25577-83

GOST 27809-88
GOST 28473-90
	Appendix 3
TU 36.26.11-5-89

5. Reissue with Change No. 1, approved in June 1989 (IUS 11-89).

This standard applies to hot-rolled shaped (angles, I-beams, channels), sheet, wide-band universal rolled products and roll-formed profiles made of carbon and low-alloy steel intended for building steel structures with welded and other connections.

It is allowed to use rolled products manufactured according to this standard for other industries.

1. ASSORTMENT

1.1. Shaped products are made from steel S235, S245, S255, S275, S285, S345, S345K, S375, universal rolled sheets and bent profiles are made from steel S235, S245, S255, S275, S285, S345, S345K, S375, S390, S390K, S440, S590, S590K.

Note. The letter C means construction steel, the numbers conventionally indicate the yield strength of rolled products, the letter K is a variant of the chemical composition.

The corresponding brands according to current standards are given in Appendix 1.

1.2. In terms of shape, size and maximum deviations, rolled products must meet the requirements:

GOST 8509-86 - for corner equal flange,

GOST 8510-86 - for unequal corner,

GOST 8239-72 - for I-beams,

GOST 19425-74 - for I-beams and special channels,

GOST 26020-83 - for I-beams with parallel flange edges,

GOST 8240-72 - for channels,

GOST 19903-74 - for rolled sheets,

GOST 82-70 - for broadband universal rental,

GOST 8706-78 - for expanded metal sheets,

GOST 8568-77 - for sheets with rhombic and lentil corrugation,

GOST 7511-73, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-77, GOST 9234-74, GOST 10551-75, GOST 13229-78, GOST 14635-79, GOST 19771-74, GOST 19772-74, GOST 25577-83 - for bent profiles.

1.3. Rental symbols must correspond to those given in Appendix 2.

2. TECHNICAL REQUIREMENTS

2.1. Rolled products are manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

2.2. The chemical composition of steel according to heat analysis of a ladle sample must comply with the standards given in table. 1.

2.3. The chemical composition of steel C255 and C285 is selected by the rolled steel manufacturer in accordance with the requirements of Table. 1.

2.5. At the request of the consumer, the mass fraction of copper in steel C345, C375, C390, C440 should be 0.15-0.30%, while the letter D is added to the steel designation, for example C345D.

The letter T is added to the steel designation, for example: S390T, S390DT, S345T-2, S345T-1.

2.7. The mass fraction of nitrogen in steel, except steel S390, S390K, S440 and S590K, should be no more than 0.008%, and when smelting in electric furnaces - no more than 0.012%.

Table 1

Name of steel	Mass fraction of elements, %
	carbon, no more	manganese		sulfur, no more					other elements
		No more than 0.60	No more than 0.05		No more than 0.040	No more than 0.30	No more than 0.30	No more than 0.30
S245, S275, S345T, S375T		No more than 0.65			No more than 0.040	No more than 0.30	No more than 0.30	No more than 0.30
		No more than 0.65			No more than 0.040	No more than 0.30	No more than 0.30	No more than 0.30
					No more than 0.040	No more than 0.30	No more than 0.30	No more than 0.30
					No more than 0.040	No more than 0.30	No more than 0.30	No more than 0.30
S345, S375, S390T**			No more than 0.80		No more than 0.035	No more than 0.30	No more than 0.30	No more than 0.30
									Aluminum 0.08-0.15
			No more than 0.60		No more than 0.035	No more than 0.40	No more than 0.30	No more than 0.30	Nitrogen 0.015-0.025
			No more than 0.17		No more than 0.035	No more than 0.30	No more than 0.30	No more than 0.20-0.40	Nitrogen 0.015-0.025
			No more than 0.60		No more than 0.035	No more than 0.40	No more than 0.30	No more than 0.30	Nitrogen 0.015-0.025
					No more than 0.035	No more than 0.30	No more than 0.30	No more than 0.30	Molybdenum 0.15-0.25
					No more than 0.035			No more than 0.30	Molybdenum 0.15-0.25
									Nitrogen 0.02-0.03
									Aluminum 0.05-0.10

* Steel heat-strengthened by rolling heating.

** Steel heat-strengthened with special heating.

Notes:

1. In steel C245, C275, C255 and C285, it is allowed to increase the mass fraction of manganese to 0.85%.

2. In steel S345K, by agreement between the manufacturer and the consumer, a mass fraction of nickel of up to 0.30% is allowed.

3. In S590K steel, it is allowed to replace part of the mass fraction of nickel with cobalt.

(Changed edition, Amendment No. 1).

Mass fraction of arsenic - no more than 0.08%.

For steel C345, the addition of aluminum and titanium is allowed in order to obtain a mass fraction of titanium in rolled products of 0.01-0.03%.

2.9. At the consumer's request, in steel S345, S375, S390, S390K and S440, the mass fraction of phosphorus should be no more than 0.030%, sulfur - no more than 0.035%.

2.10. It is allowed to treat steel with synthetic slags, vacuum degassing, blowing with argon, modifying steel with calcium and rare earth elements at the rate of introducing no more than 0.02% calcium and 0.05% rare earth elements into the metal.

2.12. When producing S590K steel using the electroslag remelting method, the letter Ш is added to the steel designation - S590KSh. The mass fraction of sulfur in S590KSh steel should be no more than 0.010%, phosphorus - no more than 0.020%.

2.13. Maximum deviations in chemical composition in finished rolled products from the standards of Table. 1 must correspond to table. 2.

table 2

Item name	Maximum deviations by mass fraction of elements, %, in rolled steel

Carbon
Manganese

Note. In rolled steel S345K, the maximum deviation for the mass fraction of phosphorus is +0.03%, for steel S590 and S590K - the maximum deviation for the mass fraction of molybdenum is ±0.02%, for steel S345K and S590K - the maximum deviation for the mass fraction of aluminum is

2.13.1. Chemical analysis of steel is allowed for the content of chromium, nickel (except steel S345K and S590K), copper (except steel S345K, S345D, S375D, S390D, S390K and S440D), arsenic and nitrogen (except steel S390, S390K, S440 and S590), aluminum (except for steel S345K and S590K), and in steel S235 also silicon and in steel S590K titanium should not be carried out by the manufacturer. The required chemical composition is guaranteed by the manufacturer. In steel smelted from Kerch ores, determination of arsenic is mandatory.

2.13.2. It is permissible for the manufacturer not to carry out a chemical analysis of the finished rolled products. The established standards are guaranteed by the manufacturer.

2.14. Rolled products are produced in a hot-rolled state. To ensure the required properties, the use of heat treatment is allowed.

Sheets from steel S390, S390K and S440 are produced in a normalized or improved condition, sheets from steel S590 and S590K are produced in an improved condition.

2.15. The condition of the surface and edges for sheet and wide universal rolled products must comply with the requirements of GOST 14637-79 and GOST 16523-70, shaped rolled products - GOST 535-88, subgroup 1. Cleaning the surface of rolled products is allowed to a depth that does not extend beyond minus deviations.

2.16. The flatness of rolled sheets must comply with the requirements of GOST 19903-74. The type of flatness is specified in the order. For rolled sheets of steel S590, S590K with a thickness of up to 20 mm inclusive. deviations from flatness should be no more than 15 mm per 1 m of length, thickness over 20 mm - no more than 12 mm per 1 m of length.

2.17. Delamination of rolled products is not allowed.

In terms of continuity during ultrasonic testing, rolled products must correspond to classes 0, 1, 2, 3 GOST 22727-88.

The need for ultrasonic testing and the continuity class are indicated in the order.

2.18. The weldability of steel is guaranteed by the manufacturer.

At the consumer's request, the carbon equivalent (C E) should be no more than 0.49% for steel S390 and S390K, and no more than 0.51% for steel S440.

2.19. Mechanical properties in tension, impact strength, as well as bending test conditions must comply with the requirements of Table 1 for shaped rolled products. 3, sheet and broadband universal - table. 4.

Table 3

Mechanical properties of shaped steel

	Shelf thickness, mm	Mechanical characteristics				Impact strength KCU, J/cm 2 (kgf m/cm 2)
			Temporary	Relative	parallelism
		turnover s T, N/mm 2 (kgf/mm 2)	resistance s B, N/mm 2 (kgf/mm 2)	elongation d5,%	sides (a is the thickness of the sample, in d- mandrel diameter)	at temperature, °C	after mechanical aging


	From 4 to 20 incl.

	From 4 to 20 incl.


	From 4 to 10 incl.


	From 4 to 10 incl.

	From 4 to 10 incl.

	From 4 to 10 incl.


	From 4 to 10 incl.
S375	From 4 to 10 incl.

* For a profile with a thickness of 5 mm, the standard impact strength is 49 J/cm 2 (5 kgf m/cm 2).

Rolled products for structural steel constructions. General specifications

GOST 27772-88

MKS 77.140.50

OKP 09 2500, 09 3000, 09 7000, 11 2000

Date of introduction 01/01/89

This standard applies to hot-rolled shaped (angles, I-beams, channels), sheet, wide-band universal rolled products and bent profiles made of carbon and low-alloy steel intended for building steel structures with welded and other connections.

It is allowed to use rolled products manufactured according to this standard for other industries.

1. ASSORTMENT

Note. The letter C means construction steel, the numbers conventionally indicate the yield strength of rolled steel, the letter K is a variant of the chemical composition.

The corresponding brands according to current standards are given in Appendix 1.

1.2. In terms of shape, size and maximum deviations, rolled products must meet the requirements:

GOST 8509 - for corner equal-flange,

GOST 8510 - for unequal corner,

GOST 8239 - for I-beams,

GOST 19425 - for I-beams and special channels,

GOST 26020 - for I-beams with parallel flange edges,

GOST 8240 - for channels,

GOST 19903 - for sheet metal,

GOST 82 - for broadband universal rental,

NTD - for expanded metal sheets,

GOST 8568 - for sheets with rhombic and lentil corrugation,

GOST 7511, GOST 8278, GOST 8281, GOST 8282, GOST 8283, GOST 9234, GOST 10551, GOST 13229, GOST 14635, GOST 19771, GOST 19772, GOST 25577 - for bent profiles.

1.3. Rental symbols must correspond to those given in Appendix 2.

2. TECHNICAL REQUIREMENTS

2.1. Rolled products are manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner.

2.2. The chemical composition of steel according to heat analysis of a ladle sample must comply with the standards given in table. 1.

Table 1

* Steel heat-strengthened by rolling heating.

** Steel heat-strengthened with special heating.

Notes:

In steel C245, C275, C255 and C285, it is allowed to increase the mass fraction of manganese to 0.85%.
In S345K steel, by agreement between the manufacturer and the consumer, a mass fraction of nickel of up to 0.30% is allowed.
In S590K steel, it is possible to replace part of the mass fraction of nickel with cobalt.

2.3. The chemical composition of steel C255 and C285 is selected by the rolled steel manufacturer in accordance with the requirements of Table. 1.

2.4. Rolled products from steel C255 with a mass fraction of manganese 0.8% - 1.1% and silicon 0.15% - 0.30% are made with a thickness of more than 30 mm, from steel C285 of the same chemical composition - with a thickness of at least 16 mm.

2.5. At the request of the consumer, the mass fraction of copper in steel S345, S375, S390, S440 should be 0.15% - 0.30%, while the letter D is added to the designation of steel, for example: S345D.

The letter T is added to the steel designation, for example: S390T, S390DT, S345T-2, S345T-1.

2.7. The mass fraction of nitrogen in steel, except steel S390, S390K, S440 and S590K, should be no more than 0.008%, and when smelting in electric furnaces - no more than 0.012%.

Mass fraction of arsenic - no more than 0.08%.

2.8. The mass fraction of residual (acid-soluble) aluminum in steel C255 and C285 with a mass fraction of manganese up to 0.85% and silicon 0.15% - 0.30%, intended for sheet and wide-strip universal rolled products, must be at least 0.020%.

For steel C345, the addition of aluminum and titanium is allowed in order to obtain a mass fraction of titanium in rolled products of 0.01% - 0.03%.

2.9. At the consumer's request, in steel S345, S375, S390, S390K and S440, the mass fraction of phosphorus should be no more than 0.030%, sulfur - no more than 0.035%.

2.10. It is allowed to treat steel with synthetic slags, vacuum degassing, blowing with argon, modifying steel with calcium and rare earth elements at the rate of introducing into the metal no more than 0.02% calcium and 0.05% rare earth elements.

2.11. When processing steel S590K with synthetic slags with a mass fraction of sulfur in the steel of no more than 0.015%, a mass fraction of residual titanium of up to 0.040% and a mass fraction of copper of up to 0.50% are allowed; with a mass fraction of sulfur of more than 0.015%, a mass fraction of residual titanium of up to 0.030% is allowed.

2.13. Maximum deviations in chemical composition in finished rolled products from the standards of Table. 1 must correspond to table. 2.

table 2

Note. In rolled steel S345K, the maximum deviation for the mass fraction of phosphorus is +0.03%, for steel S590 and S590K the maximum deviation for the mass fraction of molybdenum is +0.02%, for

steel S345K and S590K, the maximum deviations for the mass fraction of aluminum are %.

2.13.1. Chemical analysis of steel for the content of chromium, nickel (except for steel S345Ki and S590K), copper (except for steel S345K, S345D, S375D, S390D, S390K and S440D), arsenic and nitrogen (except for steel S390, S390K, S440 and S590), aluminum ( except steel S345K and S590K), and in steel S235 also silicon and in steel S590K titanium, the manufacturer does not carry out testing. The required chemical composition is guaranteed by the manufacturer. In steel smelted from Kerch ores, determination of arsenic is mandatory.

2.13.2. It is permissible for the manufacturer not to carry out a chemical analysis of the finished rolled products. The established standards are guaranteed by the manufacturer.

2.14. Rolled products are produced in a hot-rolled state. To ensure the required properties, the use of heat treatment is allowed.

Sheets made of steel S390, S390K and S440 are produced in a normalized or improved condition, sheets made of steel S590 and S590K are produced in an improved condition.

2.15. The condition of the surface and edges for sheet and wide universal rolled products must comply with the requirements of GOST 14637 and GOST 16523, for shaped rolled products - GOST 535, subgroup 1. Cleaning the surface of rolled products is allowed to a depth that does not exceed the limits of minus deviations.

2.16. The flatness of rolled sheets must comply with the requirements of GOST 19903. The type of flatness is specified in the order. For rolled sheets of steel S590, S590K with a thickness of up to 20 mm inclusive, deviations from flatness should be no more than 15 mm per 1 m of length, for thicknesses over 20 mm - no more than 12 mm per 1 m of length.

2.17. Delamination of rolled products is not allowed.

In terms of continuity during ultrasonic testing, rolled products must comply with classes 0, 1, 2, 3 GOST 22727.

The need for ultrasonic testing and the continuity class are indicated in the order.

2.18. The weldability of steel is guaranteed by the manufacturer.

At the consumer’s request, the carbon equivalent (Ce) should be no more than 0.49% for steel S390 and S390K, and no more than 0.51% for steel S440.

2.19. Mechanical tensile properties, impact strength, as well as bending test conditions must comply with the requirements of Table 1 for shaped rolled products. 3, sheet and broadband universal - table. 4.

Table 3

Mechanical properties of shaped steel

Continuation of the table. 3

* For a profile with a thickness of 5 mm, the standard impact strength is 49 J/cm 2 (5 kgf^m/cm 2).

Table 4

Mechanical properties of sheet and wide universal rolled products

Continuation of the table. 4

* For sheets and strips 5 mm thick, the standard impact strength is 39 J/cm 2 (4.0 kgf^m/cm 2).

** For sheets and strips 5 mm thick, the standard impact strength is 34 J/cm 2 (3.5 kgf^m/cm 2).

Notes:

For steel S590K, it is allowed to reduce the yield strength and tensile strength by 49 N/mm 2 (5.0 kgf^m/cm 2), relative elongation by 2% abs.
For S590KSh steel, the impact strength at a temperature of minus 70 °C should be at least 49 J/cm 2 (5.0 kgf^m/cm 2).
For steel S590 and S590K, the bending test must withstand bending of 120° without tears or cracks and up to 180° without separation into two separate parts.

2.20. The tensile strength values of rolled steel S390, S390K, S440, S590 and S590K should not exceed the standard values by more than 180 N/mm 2 (18.5 kgf/mm 2).

2.21. For sheet metal made of steel C235, C245, C255, C275 and C285 with a thickness of 4-8 mm, the standard elongation in table. 4 decreases by 2% abs.

2.22. Impact strength standards are given for rolled products with a thickness of 5 mm or more.

For shaped rolled products, impact strength standards at a temperature of minus 70 °C apply to profiles with a flange thickness of up to 11 mm inclusive; by agreement between the manufacturer and the consumer, these standards can be extended to rolled products with a thickness of up to 20 mm.

2.23. It is allowed to reduce the impact strength value on one sample by 30%. In this case, the average value of the test results should not be lower than the standards in Table. 3 and 4.

Table 5

2.25. For sheet metal made of steel S390, S390K, S440, S590 and S590K, the impact strength at a temperature of minus 40 °C is additionally determined on samples of type 11 according to GOST 9454. The impact strength must be at least 20 J/cm 2 (2.0 kgf.m/ cm 2). The norm is not rejected until 01/01/91. Determination is required.

2.26. For sheets made of steel S590K (S590KSh), the fracture of special notched samples must have a fibrous structure over an area of at least 80%.

2.27. The remaining requirements for sheet metal are in accordance with GOST 14637, GOST 16523, shaped products are in accordance with GOST 535, and bent steel profiles are in accordance with GOST 11474.

2.28. Marking, packaging - in accordance with GOST 7566 with additions: for shaped rolled products - in accordance with GOST 535, for sheet and broadband universal - in accordance with GOST 14637, for bent profiles - in accordance with GOST 11474.

2.28.1. Marking of shaped steel made of steel C235, C245, C255, C275, C285, C345 and C375 is carried out with indelible paint, using the colors given in table. 6.

Table 6

3. ACCEPTANCE

3.1. Rentals are accepted in batches. The batch must consist of rolled products of the same size, one melt - ladle, and for heat-treated rolled products - one heat treatment mode.

3.2. The batch must be accompanied by a quality document in accordance with GOST 7566, GOST 14637, GOST 16523 - for rolled sheets, GOST 535 - for shaped rolled products, GOST 11474 - for bent steel profiles with the additions:

rental symbol;
method of processing steel in a ladle (if there is processing);
values of acceptance numbers for two and six tests, determined in accordance with paragraph 3.1 of Appendix 3;
impact strength values for samples with a type V concentrator at a temperature of minus 40 °C;
continuity class of rolled sheets during ultrasonic testing.

3.3. To check the mechanical properties of rolled products, two rods, two universal strips, two sheets, two rolls are randomly selected from the batch. Randomness is ensured by the method of systematic selection according to GOST 18321.

3.4. The sample volume for checking surface quality and dimensions is in accordance with GOST 14637, GOST 16523, GOST 535, for ultrasonic testing of the continuity of rolled sheets - in accordance with GOST 14637.

3.5. The manufacturer carries out a bending test on shaped steel with a thickness of up to 20 mm every twentieth batch.

If unsatisfactory test results are obtained for yield strength, tensile strength and relative elongation, repeated tests are carried out on a sample selected in accordance with Appendix 3.

The test results apply to the entire batch.

If unsatisfactory test results are obtained during ultrasonic testing, the manufacturer conducts tests on each sheet of the batch.

4. CONTROL METHODS

4.1. Sampling to determine the chemical composition of steel is carried out in accordance with GOST 7565.

4.2. Chemical analysis of steel is carried out according to GOST 12346 - GOST 12348, GOST 12350 - GOST 12352, GOST 12355 - GOST 12359, GOST 12361, GOST 12364, GOST 17745, GOST 18895, GOST 22536.0 - GOST 22536.12, GOST 278 09, GOST 28473 or other methods, providing the necessary accuracy of analysis.

In case of disagreement between the manufacturer and the consumer, the assessment is carried out using standard methods.

4.3. Carbon equivalent (CE),%, is determined by the formula

where C, Mn, Si, Cr, Ni, Cu, V, P are the mass fractions of carbon, manganese, silicon, chromium, nickel, copper, vanadium and phosphorus, %.

4.4. Delamination of rolled products is controlled during cutting at the manufacturer and consumer by inspection of the edges.

4.5. Ultrasonic testing of the continuity of rolled sheets is carried out in accordance with GOST 22727.

(Changed edition, Amendment No. 1).

4.6. Sampling and production of samples for mechanical and technological tests are carried out in accordance with GOST 7564. Samples are cut from shaped rolled steel and universal strip along, and from sheet metal - across the rolling direction.

4.7. From each rod, sheet, universal strip, roll selected for control, samples are taken and prepared for tensile testing, bending and determination of the amount of fiber in the fracture, one sample, for determining impact strength - two samples for each temperature.

Inspection of bent profiles is carried out on the workpiece.

4.8. The tensile test is carried out on samples of five times the length in accordance with GOST 1497. For rolled products with a thickness of less than 3 mm, the sample width is 15 mm. The yield strength is determined from the tensile diagram.

4.9. Control of yield strength, tensile strength and relative elongation is carried out according to the method given in Appendix 3.

In case of disagreement, six samples selected randomly according to GOST 18321 are tested.

4.10. The bending test is carried out according to GOST 14019.

4.11. Determination of impact strength is carried out for rolled products with a nominal thickness of 5 mm, most in accordance with GOST 9454 on samples with a U-type concentrator.

The impact strength of rolled products with a nominal thickness of up to 10 mm inclusive is determined on samples with a thickness equal to the thickness of the rolled product. For rolled products with a thickness of more than 10 mm, impact strength is determined on type 1 samples according to GOST 9454.

In addition, the impact strength of rolled sheets made of steel S390, S390K, S440, S590 and S590K at a temperature of minus 40 °C is determined on samples of type 11, cut transverse to the rolling direction.

4.12. Impact strength after mechanical aging is determined according to GOST 7268 on samples using a U-type concentrator. The thickness of the samples must correspond to that adopted in clause 4.11.

4.13. In rolled sheets of steel S590K (S590KSh), the amount of fiber in a fracture is determined according to GOST 5521 at plus 20 °C on samples with a thickness equal to the thickness of the sheet.

5. TRANSPORTATION AND STORAGE

5.1. Transportation and storage - in accordance with GOST 7566 with the addition: for shaped rolled products - in accordance with GOST 535, for sheet and broadband universal - in accordance with GOST 14637, GOST 16523, and for bent profiles - in accordance with GOST 11474.

5.1.1. By rail, rolled products are transported on platforms and in gondola cars. Type of shipment is by carload.

ANNEX 1

Information

BRANDS ACCORDING TO THE CURRENT REGULATIONS AND TECHNICAL DOCUMENTATION

APPENDIX 2 Mandatory

Equal-flange corner rolled products, standard rolling accuracy (B), size 75-75-6 mm according to GOST 8509-86, made of steel C245 according to GOST 27772-88:

I-beam No. 20 according to GOST 8239-72 made of steel C275 according to GOST 27772-88:

Channel JNo. 18 with a slope of the internal edges of the shelves in accordance with GOST 8240-72 from steel C285 in accordance with GOST 27772-88:

Rolled sheets with dimensions 10-1000-2000 mm, increased accuracy (A), high flatness (PV), with cut edge (O), made of steel C390 according to GOST 27772-88:

Rolled sheets of size 8-1000-2000 mm, normal accuracy (B), improved flatness (PU), with unedged edge (NO), according to GOST 19903-74 from steel C345 with a high copper content (D), category 3 according to GOST 27772 -88:

APPENDIX 3 Mandatory

METHODOLOGY FOR CONTROL AND EVALUATION OF MECHANICAL PROPERTIES OF ROLLED STEEL

This technique is intended to assess the compliance of the mechanical properties of a batch of rolled products with the requirements of the standard.

The specified probability of meeting the norms of yield strength, tensile strength and relative elongation of each batch and the entire volume of supplied rolled products is achieved by a statistical assessment of the level and heterogeneity of the properties of the metal during a certain technological process, as well as the control procedure provided for by this standard and carried out by the manufacturer.

1. General Provisions

1.1. Terms, basic concepts and designations - in accordance with GOST 16504, GOST 15895*, GOST 15467 and other regulatory and technical documentation.

1.2. The probability of meeting the standard requirements for yield strength, tensile strength and relative elongation in each batch of rolled products must be no less than 0.95.

1.3. Assessment of the compliance of the mechanical properties of each batch with the requirements of the standard and differentiation of batches by strength of steels C245 and C275, as well as C255 and C285, C345 and C375 is carried out based on the test results of samples selected and manufactured in accordance with paragraphs. 3.3, 4.6, 4.7 of this standard, or using regression equations reflecting the relationship between the yield strength, tensile strength and elongation on the one hand and the melting chemical composition, profile size and other recorded technological factors on the other.

2. Sampling requirements, distribution statistics

2.1. The mechanical properties of rolled products made from one steel, on one mill, one or a group of similar profile sizes, one variant of the chemical composition form a general totality.

Evaluation of parameters reflecting the level and heterogeneity of the controlled characteristics of rolled products in the general population is carried out on the basis of the results of primary tests that form the sample.

On the territory of the Russian Federation, GOST R 50779.10-2000, GOST R 50779.11-2000 are in force.

2.2. For rolled steel C245 and C275; C255 and C285; C345 and C375 form a total sample in pairs.

2.3. The sample must be representative and include all the results of primary tests over a sufficiently long period of time (at least six months), during which the technological process did not undergo any directional changes (change of units, casting methods, change in raw materials, ingot weight, rolling temperature, etc. ). Minimum sample size (N) 250 heat batches. To obtain representative samples, it is possible to group profiles of different sizes into one set by checking the heterogeneity of the overall sample.

2.4. When statistically processing the test results that form the sample, the sample average (X) is determined using the formula

(2)

where X l, X 2 ... X N is the set of values of the random variable X forming the sample, and the unbiased estimate of the standard deviation (S) according to the formula

(3)

as well as the difference (h) between X and the standard value (C) given in table. 3 and 4 of this standard.

The value of h for the yield strength and tensile strength must be at least 1.645. If this condition is not met for any samples, then the production of this type of rolled product according to this standard is not allowed.

2.5. The distribution of the characteristic in the sample is assumed to correspond to the normal law. The hypothesis about the normal distribution law is tested in accordance with the normative and technical documentation. The significance level of agreement between the empirical and normal distributions must be at least 0.01.

The abnormality of the test results included in the sample will be assessed according to the normative and technical documentation at a significance level of 0.05.

2.6. The assessment of the standard deviation of the yield strength, tensile strength and relative elongation in the batch is determined experimentally by the manufacturer. At least three random batches of rolled products included in this general population are tested. At least 50 randomly selected samples are tested from each batch. Randomness is ensured by compliance with GOST 18321.

For subsequent use, the value 5 0 is accepted, obtained as the arithmetic mean value of sample standard deviations in the tested batches, calculated according to formula (3).

If for the yield strength and tensile strength the obtained value 5 0 is less than 10 N/mm 2 (1 kgf/mm 2), 5 0 = 10 N/mm 2 (1 kgf/mm 2) is accepted.

3. Assessing the compliance of the mechanical properties of batches of sheet, wide-strip and shaped rolled products with the requirements of the standard

3.1. The mechanical properties of a batch of rolled products are assessed based on the results of a tensile test of two

samples (n = 2). Arithmetic mean values (X n) of these results for the yield stress, temporary

resistance and relative elongation must be no less than the corresponding values of acceptance numbers (C p), determined by the formula

Where

In this case, the values of tensile strength when testing each of the samples of a batch of rolled steel specified in clause 2.20 of the standard should not exceed the value C + 180 (N/mm 2).

3.2. If, when testing two samples for tensile strength, the requirement of clause 3.1 of this annex is not met for at least one of the characteristics, then four more samples taken from four different sheets or rods are tested. The test results are considered satisfactory if for the yield strength, tensile strength and relative elongation X p is not less than C p at p = 6.

If it is necessary to form a sample, the results of the first two tests are used.

In this case, the values of tensile strength when testing each of the four samples of a batch of rolled steel specified in clause 2.20 of the standard should not exceed the value C + 180 (N/mm 2).

3.3. For steels S235, S245, S255, S275, S285, S345, S375, assessment of the compliance of the mechanical properties of rolled batches with the requirements of the standard can be carried out using regression equations in accordance with OST 14-34.

3.4. When statistically assessing the compliance of the mechanical properties of rolled batches with the requirements of the standard using regression equations, the minimum number of batches subjected to direct tensile tests is set depending on the smaller of the values of the Z parameter calculated for the yield strength, tensile strength and relative elongation according to the formula

(5)

When Z > 2.0, at least one out of 10 batches is tested; at 1.6< Z < 2,0 — испытывается не менее одной из 5 партий;при Z < 1,6 — испытывается каждая партия.

4.1. Assessing the compliance of the level of mechanical properties of a batch of rolled products supplied in rolls with the requirements of the standard is carried out using statistical dependencies and taking into account the difference in the level of strength and plastic characteristics of the outer turns and the middle part of the roll.

4.2. Statistical dependencies can be expressed by regression equations reflecting the relationship between the yield strength, tensile strength and relative elongation in the middle part of the roll with the test results of the outer turns, melting chemical composition, sheet thickness, temperature conditions of rolling and coiling, as well as with other recorded parameters obtained when using non-destructive testing methods.

4.3. The sample used to assess the level and heterogeneity of the mechanical properties of rolled products supplied in rolls is compiled based on the test results of samples randomly selected from the middle part of the rolls when they are cut into sheets. The sample includes the test results of samples selected from at least 50 heat batches. From each batch, samples are taken from an equal number of rolls (at least two), an equal number of samples are taken from each roll. The values of X, S and h are determined for the sample.

The remaining requirements for samples characterizing the mechanical properties of rolled products supplied in rolls are in accordance with paragraphs. 2.1—2.5 of this appendix.

Samples for characteristics that are arguments in regression equations are made in appropriate volumes.

4.4. Prediction and assessment of the compliance of the properties of a batch of rolled products supplied in rolls with the requirements of the standard using paired and multiple regression equations is allowed if the value of the paired and, accordingly, multiple correlation coefficient is not lower than 0.4 and is carried out in accordance with paragraphs. 3.1, 3.2, 3.4 of this application.

4.5. If the requirement of clause 4.4 of this appendix is not met in terms of the value of the correlation coefficient, then the manufacturer assesses the conformity of the properties of rolled products supplied in rolls in accordance with the requirements set out in clauses. 4.5.1—4.5.3.

4.5.1. For the yield strength, tensile strength and relative elongation, the experimental value S 0 is determined, for which the rental of at least three random batches included in this general population is tested. Three rolls are selected from each batch, and at least 20 samples are taken from each roll evenly along the length of the roll.

The remaining requirements for determining the value of S 0 are in accordance with paragraph 2.6 of this appendix.

4.5.2. For the yield strength, tensile strength and relative elongation, in addition to the samples compiled in accordance with the requirements of clause 4.3, a sample of a random value is formed in parallel - A. Value A is the difference between the arithmetic mean value of the test results of two samples taken from the outer turns of two rolls of the batch, and the arithmetic mean values of test results of the same number of samples taken from the middle part of the same rolls.

For the value A, the sample average (A) and standard deviation (SA) are determined.

4.5.3. To assess the compliance of a batch of rolled products with the requirements of the standard, two samples selected from the outer turns of two random rolls of the batch are tested, and the arithmetic mean value (X n) of the results of these tests is determined.

The calculated values of the yield strength, tensile strength and relative elongation are determined by the formula

(6)

The calculated values must be no less than the acceptance number Cn, determined by the formula of clause 3.1 of this appendix, with n = 2.

4. Assessing the compliance of the mechanical properties of rolled products with the requirements of the standard

INFORMATION DATA

1. DEVELOPED by the USSR Ministry of Ferrous Metallurgy, the USSR State Construction Committee, the USSR Ministry of Montazhspetsstroy, the Ukrainian Academy of Sciences

INTRODUCED by the USSR Ministry of Cherry and Metallurgy

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee on Standards dated June 30, 1988 No. 2564

3. INTRODUCED FOR THE FIRST TIME

4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

5. The validity period was lifted according to Protocol No. 7-95 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-95)

6. EDITION with Change No. 1, approved in June 1989 (IUS 11-89)