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. This alloy is used mainly for flexible metal foil heaters.
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.