鋅(Zn)余量,
鉛(Pb)≤0.1,
鐵(Fe)≤1.0,
銻(Sb)≤0.005,
磷(P)≤0.1,
鉍(Bi)≤0.002,
銅(Cu)57.0~60.0,
錳(Mn)1.0~2.0,
雜質總和%≤1.2