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ASTM O1

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.85  1.00
Si 0.10  0.50
Mn 1.00  1.40
P   0.030
S   0.030
Cr 0.40  0.60
Mo  
V   0.30
W 0.40  0.60
Ni+Cu   0.75