碳(C)%

锰(Mn)%

磷(P)%

硫(S)%

铬(Cr)%

镍(Ni)%

铜(Cu)%

0.22-0.31

0.6-0.9

0≦0.03

0≦0.035

0≦0.2

0≦0.2

0≦0.3