CuNi2 Resistance Alloy

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Introduction
CuNi2 resistance alloy is a kind of copper nickel binary alloy. It has low temperature coefficient of resistance and its maximum operating temperature is 250°C. This alloy is mainly used for manufacturing low voltage circuit breaker, low temperature electric blanket, thermal cutout and other low voltage electrical devices. And it is also used to manufacture heating cable for home electric blanket.

Type of supply

Type	Size
Round wire	D=0.06mm~8mm
Flat wire	W=0.4~40mm	T=0.05~2.9mm
Strip	W=8~200mm	T=0.1~3.0mm
Foil	W=6~120mm	T=0.005~0.1mm
Rod	Dia=8~100mm	L=50~1000mm

Main chemical composition (%)

Nickel	2	Manganese	-
Copper	Balance

Physical parameters

Yield strength (Mpa)	Tensile strength (Mpa)	Elongation (%)	Density (g/cm³)	Resistivity (20℃) (Ω・mm²/m)	Resistance temperature coefficient (20℃~600℃) 10-5/℃	Conductivity (20℃) (WmK)	Electromotive force against copper (μV/℃ ) (0~100℃)	Expansion coefficient (20 ℃- 400℃) x10-6/K	Specific heat capacity (20℃) (J/g・K)	Melting point (℃)	Max.operating temperature (℃)	Magnetism
90	220	25	8.9	0.05	＜120	130	-12	17.5	0.38	109	200	Non magnetic

Corrosion resistance performance

Atmospheric corrosion resistance at 20℃	Corrosion resistance at maximum operating temperature
	Air and other oxygen-containing gases	Ammonia containing gas	Sulfurous gas	Sulfurous gas	Carburization
			(oxidizability)	(reducibility)
Good	Poor	Poor	Poor	Poor	Good

Index
alloy strip, resistance wire