CuNi8
CuNi8 is a copper-nickel alloy (Cu82Ni12 alloy) with low resistivity for use at temperatures up to 250°C. CuNi8 is kind of low resistance heating alloy. It is one of the key materials of the low-voltage electrical products. It is widely used in low-voltage circuit breaker, electric blankets, thermal overload relay, and other low-voltage electrical product.
Chemical composition
Nickel % | Copper % | Manganese % |
8 | Bal. | - |
Typical mechanical properties (1.0mm)
Yield strength | Tensile Strength | Elongation |
Mpa | Mpa | % |
110 | 270 | 25 |
Typical physical properties
Density (g/cm3) | 8.9 |
Electrical resistivity at 20℃ (Ωmm2/m) | 0.12 |
Temperature factor of resistivity(20℃~600℃)X10-5/℃ | <57 |
Conductivity coefficient at 20℃(WmK) | 75 |
EMF vs Cu(μV/℃ )(0~100℃) | -22 |
Coefficient of thermal expansion
Temperature | Thermal Expansion x10-6/K |
20 ℃- 400℃ | 17.5 |
Specific heat capacity
Melting point (℃) | 1097 |
Max continuous operating temperature in air (℃) | 250 |
Magnetic properties | non-magnetic |
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