Cuprothal® WX is an austenitic copper-nickel alloy (CuNi) alloy used for the negative leg of the compensating cable for thermocouples type K. Cuprothal® WX must be matched with iron to meet the reference standards.
Chemical composition
| Cu % | Ni % | Fe % | Mn % | |
|---|---|---|---|---|
| Nominal composition | Bal. | 43.0 | 2.0 | 2.0 |
Mechanical properties
| Wire size | Yield strength | Tensile strength | Elongation |
|---|---|---|---|
| Ø | Rp0.2 | Rm | A |
| mm | MPa | MPa | % |
| 0.32 | - | 550 | 25 |
Physical properties
| Density g/cm3 | 8.90 |
|---|---|
| Electrical resistivity at 20°C Ω mm2/m | 0.52 |
| Temperature factor of resistivity between 20°C and 100°C 10-6/K | 100 |
| Temperature °C | Thermal Expansion x 10-6/K |
|---|---|
| 20 - 100 | 15 |
| Temperature °C | Thermal conductivity W m-1 K-1 |
|---|---|
| 20 - 100 | 21 |
| Melting point °C | 1210 |
|---|---|
| Magnetic properties | The material is non-magnetic |
Thermoelectric properties
| Temperature °C | 100 | 200 |
|---|---|---|
| mV | 4.096 | 8.139 |
ITS 90 - Reference junction 0°C
