Cuprothal® SX is a copper-nickel alloy (CuNi alloy) used for the negative leg of compensating cables for thermocouples type S/R. Cuprothal® SX must be matched with electrolytic copper (ASTM B3) to meet the reference standard.
Chemical composition
| Cu % | Ni % | Mn % | |
|---|---|---|---|
| Nominal composition | Bal. | 3.0 | 2.0 |
Mechanical properties
| Wire size | Yield strength | Tensile strength | Elongation |
|---|---|---|---|
| Ø | Rp0.2 | Rm | A |
| mm | MPa | MPa | % |
| 0.32 | - | 330 | 30 |
Physical properties
| Density g/cm3 | 8.91 |
|---|---|
| Electrical resistivity at 20°C Ω mm2/m | 0.12 |
| Temperature factor of resistivity between 20°C and 100°C 10-6/K | 1500 |
| Temperature °C | Thermal Expansion x 10-6/K |
|---|---|
| 20 - 100 | 16 |
| Melting point °C | 1080 |
|---|---|
| Magnetic properties | The material is non-magnetic |
Thermoelectric properties
| Temperature °C | 100 | 200 |
|---|---|---|
| mV | 0.646 | 1.441 |
ITS 90 - Reference junction 0°C
