Constantan
    • Constantan
Product Details:

Constantan is resistance alloy, its main compositions are copper and nickel. It has high resistivity, lower resistance temperature coefficient, wider operated temperature range(< 400℃) and it has higher anti-corrosion, heatproof, fine processing property and weldability, Its apply for AC rheostat, electrical resistor, fuse protector, light source, electric vacuum, and other electric heating devices. However, the EMF and resistance temperature coefficient is larger than manganin, it usually is not used for standard resistor or shunt of DC measuring instrument.

Alloy
name

code

 Main components

 resistivity
μOΩmiddot;m
(20℃)

Temp.Coff
of Resistance
alpha;×106/℃(20~100℃)

Elongation(﹪)

Tensile strength(N/mm2)

  Density(g/cm3)

Melting point(℃)

Working temp.(℃)

Cu

Mn

Ni

constantan

6J40

remainder

1~2

39~41

0.48±0.03

-40~+40

6~35

≥390

8.88

1280

≤400

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