C7026: Cu: Bal. Ni:1.0~3.0 Si:0.20~0.70 Mg:0.05~0.30

C70275: Cu: Bal. Ni:0.5~1.5 Si :0.1~1.4 Sn:0.4~0.8 Zn:0.3~0.7

C19010: Cu: Bal. Ni:0.8~1.8 Si:0.15~0.35 P:0.01~0.05 Zn:≦0.5 Sn:≦0.15

C1901M: Cu: Bal. Ni:0.8~1.8 Si:0.15~0.35 P:0.01~0.05 Zn:0.35~0.5 Sn:0.1~0.2