化学成分：
|
C
|
Si
|
Mn
|
Cr
|
W
|
P
|
S
|
|
0.35~0.45
|
0.80~1.10
|
≤0.40
|
1.00~1.30
|
2.00~2.50
|
≤0.030
|
≤0.030
|
