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Constantan Wire CuNi40 Nickel copper flat wire

Short Description:

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
  • product name : CuNi40
  • material: alloy
  • application : industry
  • function : good form stability
  • weight: based
  • advantage: high quality
  • color: as client's requirement
  • shape: wire
  • service: online support
  • MOQ: 20kg
  • Product Detail

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    Product Tags

    Constantan Eureca  Wire / Flat 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.

    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






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