C77000 Cupronickel

C77000 copper nickel zinc white copper
Standard: ASTM b122-1990, B151, b206m-1987 (1992, 1993 edition)
Characteristics and application: c77000 zinc white copper has good cold workability. C77000 zinc white copper is mainly used for optical instrument parts, springs, resistance wires, etc.
Chemical composition:
Copper + silver (Cu + Ag): 53.5 ~ 56.5
Lead Pb: ≤ 0.10
Iron Fe: ≤ 0.25
Zinc Zn: surplus
Nickel + cobalt (Ni + CO): 16.5 ~ 19.5
Manganese Mn: ≤ 0.50