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ASTM M3

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 1.15  1.25
Si 0.20  0.45
Mn 0.15  0.40
P   0.030
S   0.030
Cr 3.75  4.50
Mo 4.75  6.50
V 2.75  3.25
W 5.00  6.75
Co