Alloy Wire International
Datasheet: 45/55 Ni Cu Resistance Wire
45/55 Ni Cu Resistance Wire
45/55 Ni Cu Resistance Wire is a Nickel-Copper alloy wire used mainly for its medium range electrical resistivity and very low temperature-coefficient of resistance. 45/55 Ni Cu Resistance Wire has a medium resistivity and is often used in electrical resistance heating applications.
45/55 Ni Cu Resistance Wire is also known as Constantan, Hecnum, Eureka, Ferry, Vernicon and Advance.
Available in all profile options
Typical Applications
Typical Applications
45/55 Ni Cu Resistance Wire is known to be suitable for the following applications:
Power resistors, shunts, thermocouples and wire-wound precision resistors having operating temperatures up to 400 °C (750 °F).
Designations
W.Nr. 2.0842
AWS 081
Chemical Composition
The chemical composition of 45/55 Ni Cu Resistance Wire is indicated in the table below:
| Element | Min % | Max % |
|---|---|---|
| C | – | 0.10 |
| Si | – | 0.50 |
| Mn | – | 1.00 |
| Fe | – | 1.00 |
| Cu | 55.00 nominal | |
| Ni | bal |
Alloy Details
45/55 Ni Cu Resistance Wire density, electrical resistivity, operating temperature, melting point, and coefficient of expansion is indicated in the table below:
| Density | Electrical Resistivity at 20°C | Maximum Operating Temperature | Melting Point | Coefficient of Expansion |
|---|---|---|---|---|
| 8.89 g/cm³ | 49 microhm • cm | 400 °C | 1270 °C | 14.7 µm/m °C (20 – 100°C) |
| 0.321 lb/in³ | 295 ohm. Circ. mil/ft | 750 °F | 2320 °F | 8.17 x 10-6 in/in °F (70 – 212°F) |
