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ASTM M4

Chemical composition(mass fraction)(wt.%)

Chemical composition(mass fraction)(wt.%)
C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％) V(%) W(%)
1.25～1.40 0.20～0.45 0.15～0.40 ≤0.030 ≤0.030 3.75～4.75 4.25～5.50 3.75～4.50 5.25～6.50

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