Kanthal is a world-leading brand for products and services in the area of industrial heating technology and resistance materials.

Cuprothal 15 (Resistance heating wire and resistance wire)

Datasheet updated 2012-06-20 09:59:09 (supersedes all previous editions)

Cuprothal 15 is a copper-nickel alloy (CuNi alloy) with medium-low resistivity for use at temperatures up to 400°C (750°F).

Curpothal 15 is typically used for applications such as heating cables, fuses, shunts, resistors and various types of controllers.

Chemical composition

Ni % Cu %
Nominal composition 11.0 Bal.

Mechanical properties

Wire size Yield strength Tensile strength Elongation
Ø Rp0.2 Rm A
mm MPa MPa %
1.00 130 300 30

Physical properties

Density g/cm3 8.9
Electrical resistivity at 20°C Ω mm2/m 0.15

Temperature factor of resistivity
Temperature °C 20 100 200 300 400
Ct 1.00 1.035 1.07 1.11 1.15

Coefficient of thermal expansion
Temperature °C Thermal Expansion x10-6/K
20-100 16

Thermal conductivity
Temperature °C 20
W m-1 K-1 60

Specific heat capacity
Temperature °C 20
kJ kg-1 K-1 0.380

Melting point °C 1100
Max continuous operating temperature in air °C 400
Magnetic properties The material is non-magnetic

Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Kanthal materials.

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