CuNi30
CuNi30 is a copper-nickel alloy (Cu70Ni30 alloy) with low resistivity for use at temperatures up to 350°C. It 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. CuNi30 is typically used for low-temperature applications such as heating cables.
Chemical composition
Nickel % | Copper % | Manganese % |
30 | Bal. | 0.5 |
Typical mechanical properties (1.0mm)
Yield strength | Tensile Strength | Elongation |
Mpa | Mpa | % |
200 | 400 | 25 |
Typical physical properties
Density (g/cm3) | 8.9 |
Electrical resistivity at 20℃ (Ωmm2/m) | 0.35 |
Temperature factor of resistivity(20℃~600℃)X10-5/℃ | <10 |
7Conductivity coefficient at 20℃ (WmK) | 27 |
EMF vs Cu(μV/℃ )(0~100℃ ) | -37 |
Coefficient of thermal expansion
Coefficient of thermal expansion | |
Temperature | Thermal Expansion x10-6/K |
20 ℃- 400℃ | 17 |
Specific heat capacity
Melting point (℃) | 1170 |
Max continuous operating temperature in air (℃) | 350 |
Magnetic properties | Non-magnetic |
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