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B.S. 321S51 520

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.04  0.10
Si   1.00
Mn   2.00
P   0.045
S   0.025
Cr 17.00  19.00
Mo  
Ni 9.00  12.00
Ti   0.80