CuNi2 Resistance Alloy

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

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