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ГОСТ у12-3

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Cu(%)
1.15-1.24 0.17-0.33 0.17-0.33 ≤0.030 ≤0.028 0.20-0.40 ≤0.25 0.25