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ASTM O2

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.85  0.95
Si   0.50
Mn 1.40  1.80
P   0.030
S   0.030
Cr   0.50
Mo   0.30
V   0.30
W  
Ni+Cu   0.75