CuNi30 Resistance Alloy

Introduction
CuNi30 resistance alloy, a copper nickel binary alloy, is of low temperature coefficient of resistance. It is mainly used for producing rheostat, shunt, controller and other low voltage electrical components with a maximum operating temperature of 300°C. This alloy is also used in low temperature heating cable of automobile heating cushion, railway snow melting, etc., for its good heat coefficient.

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 30 Manganese 0.5
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
200 400 25 8.9 0.35 <10 27 ―37 17 0.390 1170 350 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 Good Good Good Poor Good

Index
alloy strip, resistance wire

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