C77000 Copper Alloy Strip
C77000 Nickel Silver Alloys, also called Copper-Nickel-Zinc alloys, 55-18-27 respectively, which have impressive strength, stress relaxation resistance, solderability, and shelf life. They are extremely resistant to corrosion and, therefore, will not tarnish easily. Used in applications ranging from decorative belt buckles to aircraft relays, where arcing is of concern.
Cu: 53.0-56.00%
Ni: 17.00-19.00%
Fe: 0.25% Max.
Pb: 0.05% Max.
Mn: 0.50% Max.
Zn: Balance
Note: Copper plus additions equal 99.50% minimum.
Typical Physical Properties:
Specific Gravity: 8.70 g/cm3
Coefficient of Thermal Expansion per °C: 9.80 x 10-6 (20-300°C)
Electrical Conductivity (% IACS): 5.70% @ 68 F
Thermal Conductivity: 18.00 Btu • ft/(hr • ft2•oF)at 68F
Modulus of Elasticity in tension: 18000 ksi
Elasticity modulus: 115GPa
Tensile strength: 400-805MPa
Elongation: ≥4%-40%
