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JIS SUH 31

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.35  0.45
Si 1.50  2.50
Mn   0.60
P   0.04
S   0.03
Cr 14.00  16.00
Ni 13.00  15.00
Mo  
W 2.00  3.00