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Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.18～0.28 ≤0.30 0.40～0.70 0.045 0.050 ≤0.30 ≤0.30 ≤0.30

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