2、化学成分
C
|
Si
|
Mn
|
Cr
|
Mo
|
W
|
V
|
Nb
|
P
|
S
|
0.60~
0.70
|
≤0.40
|
≤0.40
|
3.80~
4.40
|
1.80~
2.50
|
2.50~
3.50
|
0.80~
1.20
|
0.20~
0.35
|
≤0.030
|
≤0.030
|