CuMn12Ni2 Resistance Alloy

CuMn12Ni2 Resistance Alloy
CuMn12Ni2 Resistance Alloy
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Introduction
The main components of this resistance manganese-copper alloy (CuMn12Ni2) are copper and manganese, which has the same resistivity and similar temperature coefficient of resistance with the constantane. Compared with constantane resistance alloy, copper manganese resistance alloy has advantage of low cost, for having no nickel of high price. But its oxidation resistance performance is poor than constantane. It can replace the constantane resistance alloy in many applications. Manganese copper has low temperature coefficient of resistance, wide operating temperature range, good processing performance, good solderability and extremely low thermal electromotive force against copper.

Type of supply
Type Size
Round wire D=0.03mm~8mm
Flat wire W=0.4~40 T=0.03~2.9mm
Strip W=8~200mm T=0.1~3.0
Foil W=6~120mm T=0.003~0.1
Rod Dia=8~100mm L=50~1000

Application
CuMn12Ni2 resistance alloy is mainly used to produce precision wire wound resistor, potentiometer, shunt and other electrical and electronic elements.

Main chemical composition (%)
Nickel 2~3
Manganese 11~13
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
Expansion coefficient (20 ℃- 100℃)
x10-6/K

Melting point
(℃)
Max.operating temperature (℃) Magnetism
180 390 15 8.44 0.47 -3~20 40 1 18 0.41 960 5~45 Non-magnetism
Corrosion resistance
Atmospheric corrosion resistance at 20℃ Corrosion resistance at maximum operating temperature
Air and other oxygen-containing gases oxygen-containing gas Sulfurous gas (oxidizability) Sulfurous gas (reducibility) Carburization
Good Good Good Good Poor Good

Index
alloy strip, resistance alloy

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