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ASTM O6

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 1.25  1.55
Si 0.55  1.50
Mn 0.30  1.10
P   0.030
S   0.030
Cr   0.30
Mo 0.20  0.30
V  
W  
Ni+Cu   0.75