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AISI ASTM 4A,4Q

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(％) Si(％) Mn(％) P(％) S(％) W(%) Cu(%)
0.45-0.55 0.20-1.00 0.70-1.00 Max 0.040 Max 0.045 Max 0.10 Max 0.50

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