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Chemical composition in % for grade A ( А )
Grade: | C | Si | Mn | Ni | S | P | Cr | N | Cu | As |
max 0.21 | 0.15 – 0.35 | 0.4 – 1 | max 0.4 | max 0.04 | max 0.04 | max 0.3 | max 0.008 | max 0.35 | max 0.08 |
Mechanical properties under Т=20oС for grade A ( А )
Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
– | mm | – | MPa | MPa | % | % | kJ / m2 | – |
Rolled stock, GOST 5521-93 | 400-490 | 235 | 22 | |||||
Rolled stock, GOST 52927-2008 | 400-520 | 232 | 22 |
Chemical composition in % for grade B ( В )
C |
Si | Mn | Ni | S | P | Cr | N | Al | Cu |
As |
max 0.21 |
0.15 – 0.35 | 0.6 – 1 | max 0.4 | max 0.04 | max 0.04 | max 0.3 | max 0.008 | 0.015 – 0.06 | max 0.35 | max 0.08 |
Mechanical properties under Т=20oС for grade B
Assortment | Dimension | Direct. | sв | sT | d5 | y | KCU | Heat treatment |
– | mm | – | MPa | MPa | % | % | kJ / m2 | – |
Rolled stock, GOST 5521-93 | 400-490 | 235 | 22 | |||||
Rolled stock, GOST 52927-2008 | 400-520 | 232 | 22 |