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Nifethal 36 (Resistance heating wire and resistance wire)

Datasheet updated 2012-06-20 11:08:50 (supersedes all previous editions)

Nifethal 36 is an austenitic nickel-iron alloy (NiFe alloy) with very low thermal expansion factor up to 180°C (356°F). The alloy is characterized by good mechanical resistance, ductility and malleability combined with corrosion resistance. Nifethal 36 is magnetic over its normal range of use.

Nifethal 36 is a standard alloy for applications where a low thermal expansion is required, up to a maximum of 180°C (356°F), which should not be exceeded.

Typical applications for Nifethal 36 are in thermostats bars, wires for precision measureing instruments and ignition cables for the automotive industry.

Chemical composition

Ni % Fe %
Nominal composition 36.0 Bal.

Mechanical properties

Wire size Yield strength Tensile strength Elongation
Ø R0.2 Rm A
mm MPa MPa %
1.0 320 520 30

The values given apply for annealed wire

Physical properties

Density g/cm3 8.08
Electrical resistivity at 20°C Ω mm2/m 0.823
Coefficient of thermal expansion
Temperature °C Thermal Expansion X10-6 /K
20-100 1.5
20-200 2.5
Thermal conductivity
Temperature °C 100
W m-1 K-1 11
Specific heat capacity
Temperature °C 20
kJ kg-1 K-1 0.515
Melting point °C 1425
Magnetic properties The material is magnetic up to approximately 180°C (the Curie point).

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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