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Constantan

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Constantan is copper nickel as the main component of resistance alloy, density 8.9 melting point 1280 degrees, used to make electronic instruments, measuring instruments and other industrial devices in the resistance components of a basic material, with small resistance temperature coefficient, good stability, high mechanical strength characteristics, and can be made into powder, wire, foil, sheet, tape, rod, tube and other shapes. The surface can also be covered with various insulating materials. Can be customized according to user needs.

Technical parameter table:

Name	Alloy grade	Chemical composition				Temperature coefficient of resistance		Tensile strength	Electrical resistivity （20 ℃Ω m㎡/m）	elongation (mm) L。=200	Service temperature
		Cu	Mn	Ni	Si	α*10-6C-1	β*10-6C-1
constantan	6J40	yu	1.0-2.0	39-41		＜±40	------	390-585	0.44-0.50	6-15	＜500