Copper Nickel 55/45 Wire is a type of Copper-Nickel alloy wire which is mainly suitable for its medium range electrical resistivity and very low temperature-coefficient of resistance. 45/55 Ni Cu Resistance Wire is also known as Constantan, Hecnum, Eureka, Ferry, Vernicon and Advance.
Designations: W.Nr. 2.0842, AWS 081
Typical Applications: Power resistors, shunts, thermocouples and wire-wound precision resistors having operating temperatures up to 400 °C (750 °F).
| Element | Min | Max |
|---|---|---|
| C | – | 0.10 |
| Si | – | 0.50 |
| Mn | – | 1.00 |
| Fe | – | 1.00 |
| Cu | 55.00 nominal | |
| Ni | bal | |
| Density | 8.89g/cm³ | 0.321 lb/in³ |
| Electrical Resistivity at 20°C | 49 microhm • cm | 295 ohm. Circ. mil/ft |
| Maximum Operating Temperature | 400 °C | 750 °F |
| Melting Point | 1270 °C | 2320 °F |
| Coefficient of Expansion | 14.7 µm/m °C (20 – 100°C) | 8.17 x 10-6 in/in °F (70 – 212°F) |
| 55/45 Copper Nickel Filler Wire | 55/45 Cupro Nickel Filler Wire |
| CuNi 55/45 Filler Wire | CuNi 55/45 Coil Wire |
| 55/45 Cupronickel Alloy Coil Wire | CuNi 55/45 Welding Wire |
| 55/45 Cupro Nickel Electrode Wire | W.Nr. 2.0842 55/45 Copper Nickel Filler Wire |
| 55/45 Copper Nickel Coil Wire | 55/45 Cu-Ni Coil Wire |
| AWS 081 55/45 Copper Nickel Welding Wire | W.Nr. 2.0842 55/45 Copper Nickel Electrode Wire |
| 55/45 Copper Nickel Welding Wire | AWS 081 Nickel Coil Wire |
| 55/45 Cupronickel Electrode Wire | CuNi 55/45 Electrode Wire |
| 55/45 Cu-Ni Welding Wire | 55/45 Cupro Nickel Wire Mesh |
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