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Copper Nickel CuNi44 Alloy Wire for Wirewound Resistors

Short Description:

Copper Nickel Alloy is mainly made of copper and nickel. The copper and nickel can be melted together no matter what percentage. Normally the resistivity of CuNi alloy will be higher if the Nickel content is larger than Copper content. From CuNi1 to CuNi44, the resistivity is from 0.03μΩm to 0.49μΩm. That will help the resistor manufacture choosing the most suitable alloy wire.

  • Resistivity: 0.48+/-5%
  • Material: Copper nickel alloy
  • Surface: bright
  • Application: resistor,
  • Size: customized
  • sample: Accepted small order
  • Density: 8.9g/cm3
  • Product Detail


    Product Tags

    As a big manufacturer and exporter in China on the line of electric resistance alloy, we can supply all kinds of electric resistance alloy wire and strips (resistance steel wire and strips),
    Material: CuNi1, CuNi2, CuNi6, CuNi8, CuNi14, CuNi19, CuNi23, CuNi30, CuNi34, CuNi40, CuNi44
    General Description
    Due to has high tensile strength and increased resistivity values, TANKII copper nickel alloy wires are the first choice for applications as resistance wires. with the different nickel amount in this product range, the characteristics of the wire can be chosen according to your requirements. Copper nickel alloy wires are available as bare wire, or enamelled wire with any insulation and self-bonding enamel. Furthermore, litz wire made of enamelled copper nickel alloy wire are available.
    1. Higher resistance than copper
    2. High tensile strength
    3. Good bending proof performance
    1. Heating applications
    2. Resistance wire
    3. Applications with high mechanical requirements

    CuNi44 Chemical Content, %

    Ni Mn Fe Si Cu Other ROHS Directive
    Cd Pb Hg Cr
    44 1% 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

    Application of Constantan
    Constantan is a copper-nickel alloy that contains specific minor amounts of additional
    elements to achieve precise values for the temperature coefficient of resistivity. Careful
    control of melting and conversion practices results in a very low level of pinholes at
    ultra-thin thicknesses. The alloy is used extensively for foil resistors and strain gauges.

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