GB3531标准

C

Mn

Si

Ni

Cu

S

P

Cr

Mo

CEV

≤0.20

≤1.7

≤0.55

≤0.30

≥0.40

≤0.030

≤0.030

≤0.30

≤0.20

0.40%

材料

δ = 25

0.129

1.53

0.14

0.20

0.03

0.013

0.011

0.30

0

0.40%

复验

δ = 25

0.125

1.42

0.13

0.15

0.026

0.005

0.015

0.25

/

0.43%