439化學成分
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ti
|
439
|
≤0.03
|
≤1.00
|
≤1.00
|
≤0.040
|
≤0.030
|
17.00~19.00
|
0.2+4(C+N)~1.0
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Cu
|
Ti
|
443
|
0.01
|
≤1.00
|
≤1.00
|
≤0.040
|
≤0.030
|
21
|
0.43
|
0.3
|
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Ni
|
Cu
|
N
|
L1
|
0.087
|
0.48
|
9.1
|
0.045
|
0.002
|
14.25
|
0.9
|
1.5
|
0.152
|