Gost 380-2005 3sn5v

GOST 380-2005. Carbon steel of ordinary quality. Brands GOST 380-2005 Group B20

INTERSTATE STANDARD CARBON STEEL OF ORDINARY QUALITY Brands Common quality carbon steel. Grades ISS 77.080.20 OKP 08 7010

Date of implementation 2008-07-01

Foreword The objectives, basic principles and basic procedure for conducting work on interstate standardization are set by GOST 1.0-92 "Interstate Standardization System: Basic Provisions" and GOST 1.2-97 "Interstate Standardization System, Interstate Standards, Rules and Recommendations for Interstate Standardization." The procedure for the development, adoption, application, update and cancellation " About the standard 1 DEVELOPED by the Research Institute "UkrNIImet" of the Ukrainian State Scientific and Technical Center "Energostal"; Interstate Technical Committee for Standardization МТК 327 "Rolled profiled, shaped and special profiles" 2 was introduced by the State Committee of Ukraine for Technical Regulation and Consumer Policy 3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Minutes No. 28 of 9 December 2005) For the adoption of the standard voted: The country's short name for the MK (ISO 3166) 004-97 Azerbaijan Armenia Belarus Kazakhstan Kyrgyzstan

Country code for MK (ISO 3166) 004-97 AZ AM BY KZ KG

Abbreviated name of the national standardization body Azstandart Ministry of Trade and Economic Development State Standard of the Republic of Belarus State Standard of the Republic of Kazakhstan Kyrgyzstandart

Moldova Russian Federation

MD EN

Tajikistan Uzbekistan Ukraine

TJ UZ UA

Moldova-Standard Federal Agency for Technical Regulation and Metrology Tajikstandart Uzstandard Gospotrebstandart of Ukraine

4 Appendix B of this standard meets international standards: - ISO 630: 1995 "Structural steels - Rolled thick-plate, broadband, profiled and shaped profiles" (ISO 630: 1995 "Structural steels - Plates, wide flats, bars, sections and profiles", NEQ); - ISO 1052: 1982 "General purpose steel" (ISO 1052: 1982 "Steels for general engineering purposes", NEQ) regarding the requirements for the chemical composition of steel 5 * By the order of the Federal Agency for Technical Regulation and Metrology of July 20, 2007 N 185-st interstate standard GOST 380-2005 was put into effect as a national standard of the Russian Federation from January 1, 2008. ________________ * Order of the Federal Agency for Technical Regulation and Metrology of March 7, 2008 N 33 -st the date of introduction of the interstate standard GOST 380-2005 was postponed to July 1, 2008.

6 REPLACEMENT GOST 380-94 7 EDITION (September 2009) with the Amendment (8-2008).

Information on the implementation (termination) of this standard is published in the index "National Standards". Information on changes to this standard is published in the index "National standards", and the text of the changes is published in the information indexes "National standards". In case of revision or cancellation of this standard, the relevant information will be published in the information index "National Standards"

CHANGED N 1 , approved and put into effect by the Order of Rosstandart from 29.12.2015 N 2206-st from 01/04/2016 Change N 1 was made by the manufacturer of the database on the text of ISC # 4, 2016

1 area of use

This standard applies to ordinary-quality carbon steel for the production of hot-rolled products: graded, shaped, plate, thin sheet, broadband and cold-rolled sheet, as well as ingots, blooms, slabs, billets, rolled and continuous castings, pipes, forgings and stamping, tapes , wire, hardware, etc.

2 Normative references Normative references to the following interstate standards are used in this standard: GOST 7565-81 (ISO 377-2-89) Cast iron, steel and alloys. Method of sampling for chemical composition determination GOST 7566-94 Metal products. Acceptance, marking, packaging, transportation and storage GOST 12359-99 (ISO 4945-77) Carbon steels, alloyed and highly alloyed. Methods for determination of nitrogen GOST 17745-90 Steels and alloys. Methods for determination of gases GOST 18895-97 Steel. Method of photoelectric spectral analysis Carbon steel and cast iron, unalloyed. General requirements for analysis methods Carbon steel and cast iron, unalloyed. Methods for determination of total carbon and graphite Carbon steel and cast iron, unalloyed. Methods for determination of sulfur Carbon steel and cast iron, unalloyed. Methods for determination of phosphorus Carbon steel and cast iron, unalloyed. Methods for determination of silicon GOST 22536.5-87 (ISO 629-82) Carbon steel and cast iron, non-alloy. Methods for the determination of manganese Carbon steel and cast iron, unalloyed. Methods for the determination of arsenic Carbon steel and cast iron, unalloyed. Methods for the determination of chromium Carbon steel and cast iron, non-alloy. Methods for determination of copper Carbon steel and cast iron, unalloyed. Methods for the determination of nickel Carbon steel and cast iron, unalloyed. Methods for determination of aluminum Carbon steel and cast iron, non-alloy. Methods for determination of titanium GOST 27809-95 Cast iron and steel. Methods of spectrographic analysis

GOST 28033-89 Steel. X-ray fluorescence analysis method NOTE - When using this standard, it is advisable to check the operation of reference standards under the "National Standards" index, compiled as of January 1 of the current year, and on the relevant information indicators published this year. If the reference standard is replaced (modified), then when using this standard should be guided by a replacement (modified) standard. If the reference standard is canceled without replacement, then the provision referring to it is applied in the part not affecting this reference.

3 Steel grades 3.1. Carbon steel of ordinary quality is manufactured in the following grades: St0, St1kp, St1nc, St1cn, St2kp, St2pc, St2sp, St3kp, St3pc, St3sp, St3Gpc, St3Gsp, St4kp, St4pc, St4cn, St5ns, St5sn, St5ns, St6nc, St6sp. The letters "St" denote "Steel", the numbers are the conventional number of the brand depending on the chemical composition, the letter "G" is manganese with its mass fraction in steel 0.80% or more, the letters "kp", "ps", "cn" " the degree of deoxidation of steel:" kp "- boiling," ps "- half-quiet," sp "- calm. 3.2 Comparison of steel grades according to this standard and international standards ISO 630 and ISO 1052 is given in Appendix A. 3.3 Requirements for the chemical composition of steel grades E 185 (Fe 310), E 235 (Fe 360), E 275 (Fe 430), E 355 (Fe 510), Fe 490, Fe 590, Fe 690 according to international standards ISO 630 [1 ] and ISO 1052 [2] are given in Appendix B. 3.4 Degree of deoxidation, if not specified in the order, is determined by the manufacturer.

4 Requirements for the chemical composition of steel 4.1 The chemical composition of the steel (basic elements) for the analysis of the ladle sample shall comply with the standards specified in Table 1.

Table 1 In percentages steel grade

Mass fraction of chemical elements of carbon

manganese

silicon

Not more than 0,23

-

-

Ст1кпп

0.06-0.12

0.25-0.50

Not more than 0,05

Ст1пс

0.06-0.12

0.25-0.50

0.05-0.15

St1cn

0.06-0.12

0.25-0.50

0.15-0.30

Ст2кп

0.09-0.15

0.25-0.50

Not more than 0,05

St2pc

0.09-0.15

0.25-0.50

0.05-0.15

Ст2сп

0.09-0.15

0.25-0.50

0.15-0.30

Ст3кп

0.14-0.22

0.30-0.60

Not more than 0,05

St0

Ст3пс

0.14-0.22

0.40-0.65

0.05-0.15

Ст3сп

0.14-0.22

0.40-0.65

0.15-0.30

St3GPS

0.14-0.22

0.80-1.10

Not more than 0,15

St3Gsp

0.14-0.20

0.80-1.10

0.15-0.30

Ст4кп

0.18-0.27

0.40-0.70

Not more than 0,05

Ст4пс

0.18-0.27

0.40-0.70

0.05-0.15

Ст4сп

0.18-0.27

0.40-0.70

0.15-0.30

Ст5пс

0.28-0.37

0.50-0.80

0.05-0.15

Ст5сп

0.28-0.37

0.50-0.80

0.15-0.30

Ст5Гпс

0.22-0.30

0.80-1.20

Not more than 0,15

Ст6пс

0.38-0.49

0.50-0.80

0.05-0.15

Ст6сп

0.38-0.49

0.50-0.80

0.15-0.30

4.2 Manufacture of steel of all grades except for rolled steel used in shipbuilding and car building is allowed, without limiting the lower limit of the mass fraction of carbon and manganese, provided that the required level of mechanical properties is maintained. In the steel grades St2kp, St3kp and St4kp, intended for the production of profiled and shaped rolled products, it is allowed to increase the mass fraction of silicon to 0.07%. (Changed edition, Rev. N 1 ). 4.3 In the case of the deoxidation of semirigid steel with aluminum, titanium or other deoxidizers that do not contain silicon, as well as several deoxidizers (ferrosilicon and aluminum, ferrosilicon and titanium, etc.), the mass fractio n of silicon in the steel is allowed to be less than 0.05%. Deoxidation with titanium, aluminum and other deoxidizers that do not contain silicon is indicated in the quality document. 4.4. The mass fraction of chromium, nickel and copper in all grades except for St0 should not exceed 0.30% of each. In the steel grade St0, the mass fraction of chromium, nickel and copper is not standardized. In steel made by scrap-process, the mass fraction of copper is allowed up to 0.40%, chromium and nickel - up to 0.35% each. In the steel grades St3kp, St3pc, St3sp, St3Gpc and St3Gsp, the mass fraction of carbon should not be more than 0.20%. 4.5. Mass fraction of sulfur in all grades except for St0 should not exceed 0.050%, phosphorus - not more than 0.040%. In steel grade St0, the mass fraction of sulfur should not be more than 0.060%, phosphorus - not more than 0.070%. 4.6. The mass fraction of nitrogen in the steel should be no more than: - smelted in electric furnaces - 0,012%; - open-hearth and converter - 0.010%.

It is allowed to increase the mass fraction of nitrogen in the steel to 0.013%, subject to a reduction in the mass fraction of phosphorus by 4.5 by at least 0.005% with each increase in the mass fraction of nitrogen by 0.001%. 4.7 The mass fraction of arsenic in all grades except for St0 should not exceed 0.080%. The mass fraction of arsenic in the steel grade St0 is not normalized. 4.8 Limit deviations in the chemical composition of finished rolled products, ingots, blanks, forgings and products of further redistribution should comply with the standards specified in Table 2.

table 2 In percentages Name of the element

Limit deviation by chemical composition Boiling steel

Semi-calm and calm steel

Carbon

± 0.03

+0.03 -0.02

Manganese

+0.05 -0.04

+0.05 -0.03

-

+0.03 -0.02

Phosphorus

+0.006

+0.005

Sulfur

+0.006

+0.005

Nitrogen

+0.002

+0.002

Silicon

NOTE For chemical elements whose mass fraction according to 4.2 is limited only by the upper limit, positive limit deviations are used.

(Amendment); (Changed edition, Rev. N 1 ).

5 Methods of control 5.1 Methods of sampling for determining the chemical composition of steel - in accordance with GOST 7565 . 5.2. Chemical analysis of steel - according to GOST 12359 , GOST 17745 , GOST 18895 , GOST 22536.0 - GOST 22536.11 , GOST 27809 , GOST 28033 or other methods approved in accordance with the established procedure and providing the required accuracy. In the event of a disagreement between the manufacturer and the consumer, the evaluation shall be carried out by the control methods provided for in this standard. 5.3 Determination of the mass fraction of chromium, nickel, copper, arsenic, nitrogen, and in boiling steel also silicon is allowed not to be carried out provided that the manufacturer guarantees the standards.

6 Marking 6.1 The marking of products of carbon steel of ordinary quality shall be carried out according to regulatory documents for a specific type of metal products, taking into the requirements of GOST 7566 . At the request of the consumer, or in the presence of requirements for color marking in regulatory documents for rolling, it is additionally applied with indelible paint with the colors indicated in Table 3.

Table 3 steel grade

Color of marking

St0 Ст1

Red and green Yellow and black

Ст2 Ст3 St3GPS St3Gsp Ст4 Ст5 Ст5Гпс Ст6

Yellow Red Red and brown Blue and brown The black Green Green and brown Blue

Appendix A (informative). Designation of steel grades according to this standard and international standards ISO 630: 1995, ISO 1052: 1982 Appendix A (informative) Table A.1 Steel grade by GOST 380: 2005

ISO 630: 1995

ISO 1052: 1982

St0

E 185 (Fe 310)

-

Ст1кпп

-

-

Ст1пс

-

-

St1cn

-

-

Ст2кп

-

-

St2pc

-

-

Ст2сп

-

-

Ст3кп

E 235-A (Fe 360-A)

-

Ст3пс

E 235-B (Fe 360-B)

-

Ст3сп

E 235-C (Fe 360-C)

-

St3GPS

E 235-B (Fe 360-B)

-

St3Gsp

E 235-C (Fe 360-C)

-

E 235-D (Fe 360-D) Ст4кп

E 275-A (Fe 430-A)

-

Ст4пс

E 275-B (Fe 430-B)

-

Ст4сп

E 275-C (Fe 430-C)

-

E 275-D (Fe 430-D) Ст5пс

-

Fe 490

Ст5сп

E 355-C (Fe 510-C)

Fe 490

Ст5Гпс

-

Fe 490

Ст6пс

-

Fe 590

Ст6сп

-

Fe 590 Fe 690

Appendix B (recommended). Requirements for steel according to international standards ISO 630: 1995, ISO 1052: 1982 Appendix B (recommended) B.1 The chemical composition of steel for the analysis of the ladle sample shall comply with the standards given in Table B.1

Table B.1 steel grade

Quality category

Thickness of rolled metal,

Mass fraction of chemical elements,%, not more than

Degree of deoxidation

mm of carbon

phosphorus

sulfur

manganese

silicon

-

-

-

-

-

-

0.22

0.050

0.050

-

-

-

Up to 16 St. 16 to 25 Up to 40 St. 40

0.17 0.20 0.17 0.20 0.17 0.17

0.045 0.045 0.045 0.045 0.040 0.035

0.045 0.045 0.045 0.045 0.040 0.035

1.40 1.40 1.40 1.40 1.40 1.40

0.40 0.40 0.40 0.40 0.40 0.40

NE NE NE GF

A

Up to 40

0.24

0.050

0.050

-

-

-

AT

St. 40

0.21 0.22 0.20 0.20

0.045 0.045 0.040 0.035

0.045 0.045 0.040 0.035

1.50 1.50 1.50 1.50

0.40 0.40 0.40 0.40

NE NE NE GF

Up to 30

0.20

0.040

0.040

1.60

0.55

NE

E 185 (Fe 310)

0

E 235 (Fe 360)

A AT

-

FROM D E 275 (Fe 430)

FROM D E 355 (Fe 510)

FROM

St. 30 Up to 30 St. 30

0.22 0.20 0.22

0.040 0.035 0.035

0.040 0.035 0.035

1.60 1.60 1.60

0.55 0.55 0.55

NE GF GF

Fe 490

-

-

-

0.050

0.050

-

-

-

Fe 590

-

-

-

0.050

0.050

-

-

-

Fe 690

-

-

-

0.050

0.050

-

-

-

Note 1 - The "-" sign indicates that the indicator is not standardized. Note 2 - NE - non-smoking steel. Note 3 - GF - fine-grained calm steel. The recommended mass fraction of total aluminum is not less than 0.020%.

B.2 Steel grades Fe 490, Fe 590 and Fe 690 are made of a calm and calm. B.3 Limit deviations of the chemical composition in the finished rolled products shall correspond to those given in Table B.2.

Table B.2 In percentages Element

Limit deviation by chemical composition

Carbon

+0.03

Manganese

+0.10

Silicon

+0.05

Phosphorus

+0.010

Sulfur

+0.010

Bibliography [1] ISO 630: 1995

Structural steel. Rolled thick-plate, broadband, profiled and shaped profiles (ISO 630: 1995

[2] ISO 1052: 1982

Structural steels - Plates, wide flats, bars, sections and profiles) General purpose steel (ISO 1052: 1982 Steels for general engineering purposes)

The electronic text of the document was prepared by JSC "Codex" and verified by: official publication Carbon steel of ordinary quality and low alloy: Sat. GOST. M .: Standartinform, 2009

The editorship of the document, taking into changes and amendments, was prepared by JSC "Kodeks"