Cuprothal® 30 is a copper-nickel alloy (CuNi alloy) with medium resistivity suitable for use at temperatures up to 400°C (750°F).
Cuprothal® 30 is typically used for applications such as heating cables, fuses, shunts, resistors and various types of controllers.
Chemical composition
| Ni % | Mn % | Cu % | |
|---|---|---|---|
| Nominal composition | 21.0 | 1.5 | Bal. |
Mechanical properties
| Wire size | Yield strength | Tensile strength | Elongation | Hardness |
|---|---|---|---|---|
| Ø | Rp0.2 | Rm | A | |
| mm (in) | MPa (ksi) | MPa (ksi) | % | Hv |
| 1.00 (0.04) | 170 (25) | 380 (55) | 30 | 110 |
| 2.20 (0.09) | 160 (23) | 360 (52) | 32 | 100 |
Physical properties
| Density g/cm3 (lb/in3) | 8.9 (0.322) |
|---|---|
| Electrical resistivity at 20°C Ω mm2/m (Ω circ. mil/ft) | 0.30 (180) |
| Temperature °C | 20 | 100 | 200 | 300 | 400 |
|---|---|---|---|---|---|
| Temperature °F | 68 | 212 | 392 | 572 | 752 |
| Ct | 1.00 | 1.02 | 1.03 | 1.04 | 1.06 |
| Temperature °C (°F) | Thermal Expansion x10-6/K (10-6 /°F) |
|---|---|
| 20-100 (68-212) | 16 (8.9) |
| Temperature °C (°F) | 20 (68) |
|---|---|
| W m-1 K-1 (Btu h-1ft-1°F-1) | 35 (20.2) |
| Temperature °C (°F) | 20 (68) |
|---|---|
| kJ kg-1 K-1 (Btu lb-1 °F-1) | 0.370 (0.09) |
| Melting point °C (°F) | 1150 (2102) |
|---|---|
| Max continuous operating temperature in air °C (°F) | 400 (752) |
| Magnetic properties | The material is non-magnetic |
