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Cu-Ni 715 • UNS C71500

Cu-Ni 715 is a copper-nickel alloy that is resistant to corrosion in sea water. The alloy has good fatigue strength and relatively high thermal conductivity.

The alloy is readily formed in the annealed temper, and can be joined by the standard welding, brazing and soldering processes.

Available Sizes:

Cu-Ni 715 is available from Hamilton Precision Metals as strip product in thicknesses from 0.0005” to 0.010” (0.0127 mm to 0.254 mm) in widths up to 12” (304.8 mm). The material conforms to ASTM B122 and UNS C71500.

Nominal Composition
Cu-Ni 715 NOMINAL COMPOSITION
Copper 70%
Nickel Balance


Mechanical Properties
Cu-Ni 715 MECHANICAL PROPERTIES
ANNEALED COLD ROLLED
Ultimate Tensile Strength 65,000 PSI 100,000 PSI
Yield Strength (0.2% Offset) 35,000 PSI 90,000 PSI
Elongation in 2” * 30% 2%
Modulus of Elasticity (Tension) 22 X 106 PSI -

*The measured elongation will be less as thickness decreases to 0.002” and less
These values may be adjusted by control of process variables – consult HPM for desired values.


Physical Properties
Cu-Ni 715 PHYSICAL PROPERTIES
Density 0.322 lbs./cu.in.
Melting Point (Approx. 1170°C
Electrical Resistivity @ R.T 41.2 Microhm·cm
Thermal Expansion Coefficient (20° to 95°C) 15.5 x 10-6/°C
Thermal Conductivity @ R.T. 29.4 W/m·K
Magnetic Attraction None
Specific Heat 0.09 gram·cal./°C

Typical values to guide alloy selection but are not a guarantee of minimum or maximum.