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

Nikrothal 80 (Resistance heating wire and resistance wire)

Datasheet updated 2012-06-20 11:21:15 (supersedes all previous editions)

Nikrothal 80 is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1200°C (2190°F). The alloy is characterized by high resistivity, good oxidation resistance and very good form stability. It has good ductility after use and excellent weldability.

Nikrothal 80 is used for electric heating elements in home appliances and industrial furnaces. Typical applications are flat irons, ironing machines, water heaters, plastic moulding dies, soldering irons, metal sheathed tubular elements and cartridge elements.

Due to extremely good adhesion properties of the surface oxide, Nikrothal 80 offers superior service life compared to competitive nickel-chromium alloys.

Chemical composition

C % Si % Mn % Cr % Ni % Fe % Trace elements
Nominal composition Bal. Added
Min - 1.0 - 19.0 - - -
Max 0.10 1.7 1.0 21.0 - 2.0* -

* Fe< 1.0 on request

Mechanical properties

Wire size Yield strength Tensile strength Elongation Hardness
Ø Rp0.2 Rm A
mm MPa MPa % Hv
1.0 420 810 30 180
4.0 300 725 30 160

Mechanical properties at elevated temperature
Temperature °C 900
MPa 100

Ultimate tensile strength - deformation rate 6.2 x 10-2/min

Creep strength - 1% elongation in 1000 h
Temperature °C 800 1000
MPa 15 4

Physical properties

Density g/cm3 8.30
Electrical resistivity at 20°C Ω mm2/m 1.09

Temperature factor of resistivity
Temperature°C 100 200 300 400 500 600 700 800 900 1000 1100 1200
Ct 1.01 1.02 1.03 1.04 1.04 1.04 1.04 1.04 1.04 1.05 1.06 1.07

Coefficient of thermal expansion
Temperature °C Thermal Expansion x 10-6/K
20 - 250 14.1
20 - 500 14.9
20 - 750 16.0
20 - 1000 17.2

Thermal conductivity
Temperature °C 20 100 200 300 400 500 600 700 800 900 1000 1100
W m-1 K-1 15 15 15 15 17 19 21 22 24 26 28 30

Specific heat capacity
Temperature °C 20 100 200 300 400 500 600 700 800 900 1000 1100
kJ kg-1 K-1 0.46 0.46 0.48 0.50 0.52 0.54 0.56 0.60 0.63 0.65 0.67 0.70

Melting point °C 1400
Max continuous operating temperature in air °C 1200
Magnetic properties The material is non-magnetic
Emissivity - fully oxidized material 0.88

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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