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Safeni 52 (Resistance heating wire and resistance wire)

Datasheet updated 2016-09-30 08:26:57 (supersedes all previous editions)

Safeni 52 is a nickel-iron alloy (NiFe alloy) for use at temperatures up to 600°C (1110°F). The alloy is characterized by low resistivity and high temperature coefficient of resistance.

Typical applications for Safeni 52 are in reed switches, voltage regulators, timing devices, temperature sensitive resistors, temperature compensating devices, and low temperature heating applications.

Chemical composition

Ni % Fe %
Nominal composition 52.0 Bal.

Mechanical properties

Wire size Yield strength Tensile strength Elongation
Ø Rp0.2 Rm A
mm MPa MPa %
0.5 340 610 30

Physical properties

Density g/cm3 8.20
Electrical resistivity at 20°C Ω mm2/m 0.37
Temperature factor of resistivity
Temperature °C 100 150 200 250 300 350 400 450 500
Ct 1.33 1.53 1.73 1.93 2.13 2.32 2.49 2.64 2.77
Coefficient of thermal expansion
Temperature °C Thermal Expansion X10-6/K-1
20-100 10
Thermal conductivity
Temperature °C 20
W m-1 K-1 17
Specific heat capacity
Temperature °C 20
kJ kg-1 K-1 0.50
Melting point °C 1435
Max continuous operating temperature in air °C 600
Magnetic properties The material is magnetic up to approximately 530°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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