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CuNi40 Alloy Resistance Electric Copper Nickel Heating Wire

Short Description:

CuNi40 Alloy Resistance Electric Copper Nickel Heating Wire

Product Description
Constantan Wire with moderate resistivity and low temperature coefficent of resistance with a flat resistance/temperature curve over a wider range than the "manganins". Constantan also shows better corrosion resistance than the man ganins. Uses tend to be restricted to ac circuits.
Constantan wire is also the negative element of the type J thermocouple with Iron being the positive; type J thermocouples are used in heat treating applications. Also, it is the negative element of the type T thermocouple with OFHC Copper the positive; type T thermocouples are used at cryogenic temperatures.


  • Certificate: ISO 9001
  • Size: Customized
  • Serves: Small Oreder Accepted
  • Sample Free: Available
  • Size: 0.01-10mm
  • Density: 8.9g/cm3
  • OEM: yes
  • Elongation: 25%
  • standard: GB/ASTM/JIS/BIS/DIN
  • surface: Bright
  • Resisivity: 0.48
  • Product Detail

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    CuNi40 Alloy Resistance Electric Copper Nickel Heating WireProduct Description
    Constantan Wire with moderate resistivity and low temperature coefficent of resistance with a flat resistance/temperature curve over a wider range than the “manganins”. Constantan also shows better corrosion resistance than the man ganins. Uses tend to be restricted to ac circuits.

    Constantan wire is also the negative element of the type J thermocouple with Iron being the positive; type J thermocouples are used in heat treating applications. Also, it is the negative element of the type T thermocouple with OFHC Copper the positive; type T thermocouples are used at cryogenic temperatures.

    Chemical Content, %

    Ni Mn Fe Si Cu Other ROHS Directive
    Cd Pb Hg Cr
    44 1.50% 0.5 - Bal - ND ND ND ND

    Mechanical Properties

    Max Continuous Service Temp 400ºC
    Resisivity at 20ºC 0.49±5%ohm mm2/m
    Density 8.9 g/cm3
    Thermal Conductivity -6(Max)
    Melting Point 1280ºC
    Tensile Strength,N/mm2   Annealed,Soft 340~535 Mpa
    Tensile Strength,N/mm3   Cold Rolled 680~1070 Mpa
    Elongation(anneal) 25%(Min)
    Elongation(cold rolled) ≥Min)2%(Min)
    EMF vs Cu, μV/ºC (0~100ºC) -43
    Micrographic Structure austenite
    Magnetic Property Non

    Our Services

    a) We can provide high quality material, excellent design, precise manufacturing,complete specifications, considerate and integrity serivices.

    b)  We can provide all kinds of electric heating alloy material and elements, including customized products.

    c)  We can provide a complete solution for you.

    d)  OEM service can be provided.

    e)  Product selection

    f)  Process optimization

    g)  New product development





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