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ASTM A4

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％)
0.95～1.05 0.10～0.50 1.80～2.20 ≤0.030 ≤0.030 0.90～1.20 0.90～1.40

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