Cuprothal® 5 is a copper-nickel alloy (CuNi alloy) with low resistivity for use at temperatures up to 300°C (570°F).
Cuprothal® 5 is typically used for low-temperature applications such as heating cables in electric blankets and pillows.
Chemical composition
| Ni % | Cu % | |
|---|---|---|
| Nominal composition | 2.2 | Bal. |
Mechanical properties
| Wire size | Yield strength | Tensile strength | Elongation |
|---|---|---|---|
| Ø | Rp0.2 | Rm | A |
| mm (in) | MPa (ksi) | MPa (ksi) | % |
| 1.00 (0.04) | 100 (14.5) | 240 (34.8) | 30 |
Physical properties
| Density g/cm3 (lb/in3) | 8.9 (0.322) |
|---|---|
| Electrical resistivity at 20°C Ω mm2/m (Ω circ. mil/ft) | 0.05 (30.1) |
| Temperature °C | 20 | 100 | 200 | 300 |
|---|---|---|---|---|
| Temperature °F | 68 | 212 | 392 | 572 |
| Ct | 1.00 | 1.11 | 1.25 | 1.40 |
| Temperature °C (°F) | Thermal Expansion x10-6/K (10-6 /°F) |
|---|---|
| 20 - 100 (68-212) | 16.5 (9.2) |
| Temperature °C (°F) | 20 (68) |
|---|---|
| W m-1 K-1 (Btu h-1ft-1°F-1) | 130 (75.2) |
| Temperature °C (°F) | 20 (68) |
|---|---|
| kJ kg-1 K-1 (Btu lb-1 °F-1) | 0.380 (0.09) |
| Melting point °C (°F) | 1090 (1994) |
|---|---|
| Max continuous operating temperature in air °C (°F) | 300 (572) |
| Magnetic properties | The material is non-magnetic |
