Constantan alloy is charactered as low electric resisitance, it is used in wide temperature range, it is good heat-resistant and corrosion-resistant, also easy to be processed and lead welded.
Some type as below:
Cuni6, cuni19, cuni44

Details:

Type 1:Cuni6
Electrical resistivity (20degreeΩMm²/m):0.10
Temperature coefficient of resistance(10^6/degree):<600
Density g/mm²:8.9
Max.Temperature (degree):220
Melting point (degree):1095

Type 2:Cuni19
Electrical resistivity (20degreeΩMm²/m):0.25
Temperature coefficient of resistance(10^6/degree):<250
Density g/mm²:8.9
Max.Temperature (degree):300
Melting point (degree):1135

Type 3:Cuni44
Electrical resistivity (20degreeΩMm²/m):0.49
Temperature coefficient of resistance(10^6/degree):<-6
Density g/mm²:8.9
Max.Temperature (degree):400
Melting point (degree):1280