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Cuprothal 49 wire

Cuprothal 49 wire

Place of Origin : China
Brand Name : Yuanqiao
Model Number : 0073
condition : annealed
surface : bright
Min order : 30kg
Size : 24~32 AWG
MOQ : 10kg
Price : 15USD/kg
Packaging Details : Wire on spool
Delivery Time : based on your quantity
Payment Terms : Western union or TT payment
Supply Ability : 20 tons each month
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Cuprothal 49 is a copper-nickel alloy (CuNi alloy) characterized by high electrical resistance, high ductility and good corrosion resistance. It is suitable for use at temperatures up to 600°C (1110°F).

Typical applications for Cuprothal 49 are temperature-stable potentiometers, industrial rheostats and electric motor starter resistances.

The combination of negligible temperature coefficient and high resistivity makes the alloy particulary suitable for the winding of precision resistors.

Cuprothal 49 is manufactured from electrolytic copper and pure nickel. In finer wire sizes the alloy is designated as Cuprothal 49 TC.

Chemical composition

Ni %Mn %Fe %Cu %
Nominal Composition44.01.00.5Bal.

Mechanical properties

Wire sizeYield strengthTensile strengthElongationHardness

Physical properties

Density g/cm38.9
Electrical resistivity at 20°C Ω mm2/m0.49
Temperature coefficient of resistance K-1± 20 ppm (wire < 0.30 mm)
± 60 ppm (wire > 0.30 mm)

Temperature factor of resistivity
Temperature °C100200300400500600

Coefficient of thermal expansion
Temperature °CThermal Expansion X10-6/K

Thermal conductivity
Temperature °C20
W m-1 K-121.0

Specific heat capacity
Temperature °C20
kJ kg-1 K-10.410

Melting point °C1280
Max continuous operating temperature in air °C600
Magnetic propertiesThe material is non-magnetic

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