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CuNi 44 Wires & Strips

Leading Manufacturer of cuprothal 49 wire and constantan wire from Mumbai.

Cuprothal 49 Wire

Cuprothal 49 Wire
  • Cuprothal 49 Wire
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Approx. Price: Rs 2,900 / KgGet Latest Price
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Product Details:

Usage/ApplicationIndustrial
MaterialCuprothal (Cu Ni Alloy)
BrandKanthal ( Sweden )
Hardness130 Hv
Yield Strength250 MPa
Tensile Strength430 MPa
Elongation20%
Density8.9 g/cm3
Electrical Resistivity0.49 ohm mm2/m at 20 Deg C
Temperature Factor of Resistivity100-600 Deg C
Melting Point1280 Deg C

Cuprothal 49 is an austenitic copper-nickel alloy (CuNi alloy) for use at temperatures up to 600°C (1110°F). The alloy is characterized by high electrical resistance, high ductility and good corrosion resistance.


In finer sizes the alloy's negligible temperature coefficient of resistance combined with its high resistivity makes it useful for the winding of precision resistors which must not change in resistance over a limited range in temperature. For this purpose the alloy is identified as Cuprothal 49 TC.


Other typical applications are:

  • Temperature-stable potentiometers
  • Industrial rheostats
  • Electric motor starter resistances.
Ni %Mn %Fe %Cu %
Nominal Composition44.01.00.5Bal.
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Constantan Wire

Constantan Wire
  • Constantan Wire
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Approx. Price: Rs 2,500 / KilogramGet Latest Price

Product Details:

MaterialConstantan (Cu Ni Alloy)
Usage/ApplicationResistance & Thermocouple
Thickness0.5-1.5 mm
BrandRescal (France)
Hardness130 Hv
Highest Temperature400 Deg C
SurfaceBright Annealed
Material GradeCuNi44

CuNi44 offers high electrical resistivity and very low temperature coefficient of resistance (TCR). Due to its low TCR, it finds use in wire-wound precision resistors that can operate up to 400°C (750°F). This alloy is also capable of developing a high and constant electromotive force when coupled with copper. This property allows it to be used for thermocouple, thermocouple extension and compensating leads. It is easily soldered, welded, and offers good corrosion resistance against atmospheric conditions.
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National Enterprise
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