矽(Si)%

铅(Pb)%

磷(P)%

镍(Ni)%

锌(Zn)%

铜(Cu)%

镁(Mg)%

0.05-0.2

0≦0.5

0≦0.8

0≦0.2

0≧10.8

83-87

0≦0.5