化学成分：
|
C
|
Si
|
Mn
|
P
|
S
|
Cu
|
Ni
|
Mo
|
V
|
Nb
|
Ti
|
B
|
|
≤0.07
|
0.15～0.40
|
1.00～1.60
|
≤0.015
|
≤0.010
|
≤0.30
|
≤0.50
|
≤0.30
|
≤0.06
|
≤0.06
|
≤0.025
|
≤0.003
|
