GOST 19281 — Rolled steel with increased strength. General specifications
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Scope
Low-alloy structural rolled steel of increased strength: plate, sections, bar and strip in grades from 09G2S and 10KhSND to 17G1S, classified by strength class from 265 to 590 MPa. Specifies chemistry, yield and tensile by thickness, elongation, impact energy at room temperature, −40 °C, −60 °C or −70 °C depending on the grade and category, and impact after mechanical ageing. This is the standard behind Russian and CIS cold-climate structural steel.
Grades covered by GOST 19281
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Nearest equivalents |
|---|---|---|---|---|---|---|
| 09G2S | — | Low-alloy structural steel of increased strength (GOST / CIS) | ≤ 0.12 | 345 | ≥ 490 | s355j2, s355jr, a572-50 |
Revision history and superseded standards
| Year | Change |
|---|---|
| 1973 | Split across GOST 19281 (plate and sections) and GOST 19282 (thick plate) |
| 1989 | The two merged; strength classes 265–590 introduced |
| 2014 | Current edition; category system revised and impact temperatures restated |
Supersedes: GOST 19281-89; GOST 19282-73 (merged).
Where to buy the standard
The full text is copyrighted by Rosstandart / EASC (interstate standard) and is not reproduced here. Purchase the current edition from Rosstandart (protect.gost.ru) or your national standards body. The values on this site are the normative limits as published; the standard's own tables, notes and test methods govern.
Related standards
Strength class, not grade name
GOST 19281 covers low-alloy rolled steel of increased strength and organises it by strength class — 265 through 590 MPa — rather than primarily by grade name. A certificate may therefore read "09G2S, class 345", with the class carrying the mechanical guarantee.
The family includes 09G2, 09G2S, 17G1S and the weathering grades 10KhSND and 15KhSND. Unlike GOST 380, this standard carries its own mechanical table, so a grade under it is a complete specification in one document.
The cold-climate standard
What sets this standard apart internationally is its impact regime. Depending on the category ordered, grades are tested at −40 °C, −60 °C or −70 °C, and additionally after mechanical ageing. Routine −70 °C certification of a commodity structural steel is rare anywhere else, and it is why 09G2S dominates construction in Siberia and the Russian north.
One caution when comparing with EN: GOST reports impact as KCU in J/cm² on a U-notch specimen, while EN reports KV in joules on a V-notch. The V-notch test is the more severe and the two figures do not convert. Where a design is written to EN, the V-notch test has to be ordered as a supplementary requirement.