copper nickel Alloy Constantan Cupro-Nickel CuNi44 Strip/Foil/Ribbon
Constantan As a big manufacturer and exporter in China on the line of electric resistance alloy, we can supply all kinds of electric resistance alloy wire and strips (resistance steel wire and strips),
Material: CuNi1, CuNi2, CuNi6, CuNi8, CuNi14, CuNi19, CuNi23, CuNi30, CuNi34, CuNi44.
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.
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 Content, %:
|Max Continuous Service Temp||400ºC|
|Resisivity at 20ºC||0.49±5%ohm mm2/m|
|Tensile Strength,N/mm2 Annealed,Soft||340~535 Mpa|
|Tensile Strength,N/mm3 Cold Rolled||680~1070 Mpa|
|EMF vs Cu, μV/ºC (0~100ºC)||-43|
Application of Constantan:
Constantan is a copper-nickel alloy that contains specific minor amounts of additional elements to achieve precise values for the temperature coefficient of resistivity. Careful control of melting and conversion practices results in a very low level of pinholes at ultra-thin thicknesses. The alloy is used extensively for foil resistors and strain gauges.