项目

C

Si

Mn

P

S

Cr

Ni

Cu

As

判钢

0.78~0.83

0.15~0.35

0.75~0.90

≤0.030

≤0.030

0.20～0.28

≤0.20

≤0.25

≤0.020

内控

0.79~0.82

0.20~0.30

0.78~0.88

≤0.015

≤0.010

0.20～0.25

≤0.20

≤0.25

≤0.020