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B.S. BT1

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.70  0.80
Si   0.40
Mn   0.40
Co   1.00
Cr 3.75  4.50
Mo   0.70
Ni   0.40
V 1.00  1.25
W 17.5  18.5
Cu   0.20
Sn   0.05