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SAE A 959 Type 309HCb

Chemical composition(mass fraction)(wt.%)

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.04  0.10
Si   0.75
Mn   2.00
P   0.045
S   0.03
Cr 22.0  24.0
Ni 12.0  16.0
Nb   1.100

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