化學(xué)成分:
銅 Cu :62.0~65.0
鎳+鈷 Ni+Co:13.5~16.5
鋅 Zn:余量
鉛 Pb:≤0.02
磷 P:≤0.005
鐵 Fe:≤0.5
錳 Mn:≤0.3
硅 Si :≤0.15
銻 Sb :≤0.002
硫 S :≤0.01
砷 As :≤0.010
碳 C:≤0.03
鉍 Bi:≤0.002
鎂 Mg:≤0.05
注:≤0.9(雜質(zhì))