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CuNi44, also called Constantan, has a very low temperature coefficient, high electrical resistance, high ductility and non-corroding properties. It is suitable for use at temperatures up to 600°C (1110°F). As a very malleable, very ductile alloy, it has a very good resistance to oxidation.
CuNi44 wires or strips
CuNi heating alloy wire
constantan wires or strips
copper nickel wires or strips
CuNi heating alloy wire
constantan wires or strips
copper nickel wires or strips
The alloy is non-magnetic. It is suitable for electrical resistors, potentiometers, heating wires, heating cables and mats. Ribbons are used for heating of bimetals.Another field of application is manufacturing of thermocouples because it develops a high electromotive force (EMF) in association with others metals.
Chemical Composition
Alloy | Ni% | Mn% | Fe% | Cu% |
CuNi44 | 43 | Max 0.5 | - | Bal. |
Physical Data
Density | 8.9 g/cm3 |
Specific Heat | 0.41(J/kg 20°C) |
Electrical Resistivity | 0.049×10-6ohm.m |
Melting Point | 1210°C |
Maximum Operating Temperature | 600°C |
Coefficient of linear expansion (coeff 10-6/°C) | 14 from 20 to 1000°C |
Typical Mechanical Properties
Mechanical Properties | CuNi44 |
Tensile Strength | 420 Mpa |
Elongation | 25% |
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