鋅(Zn)余量,
鉛(Pb)≤0.05,
鐵(Fe)≤0.10,
銻(Sb)≤0.005,
磷(P)≤0.01,
鉍(Bi)≤0.002,
錫(Sn)0.8~1.3,
砷(As)0.03~0.06,
銅(Cu)69.0~71.0,
雜質(zhì)總和%≤0.3 [1-2]