锌(Zn)余量,
铅(Pb)≤0.05,
铁(Fe)≤0.10,
锑(Sb)≤0.005,
磷(P)≤0.01,
铋(Bi)≤0.002,
锡(Sn)0.8～1.3,
砷(As)0.03～0.06,
铜(Cu)69.0～71.0,
杂质总和%≤0.3 [1-2]