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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