钢种

板厚

化学成分% (wt%)

^aC_eq%

^bP_cm%

/mm

C

Si

Mn

P

S

Cr

Ni

Mo

Cu

V

B

SX780CF

>80

≤120

≤0.1

≤0.5

0.7~1.5

≤0.015

≤0.005

≤0.6

0.5~1.5

≤0.7

≤0.5

≤0.05

≤0.004

≤0.54

≤0.26