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ГОСТ у13A-1

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Cu(%)
1.25-1.35 0.17-0.33 0.17-0.28 ≤0.025 ≤0.018 ≤0.20 ≤0.25 0.25