等級(jí)
|
C
|
Mn
|
Si
|
P
|
S
|
V
|
Nb
|
Ti
|
Al
|
Cr
|
Ni
|
A
|
≦ 0.16
|
0.80~1.50
|
≦0.55
|
≦0.040
|
≦0.040
|
0.02~0.15
|
0.015~0.060
|
0.02~0.20
|
-
|
-
|
-
|
B
|
≦ 0.16
|
0.80~1.50
|
≦0.55
|
≦0.045
|
≦0.045
|
0.02~0.15
|
0.015~0.060
|
0.02~0.20
|
-
|
-
|
-
|