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

Kanthal AE (Resistance heating wire and resistance wire)

Datasheet updated 2012-06-20 10:15:31 (supersedes all previous editions)

Kanthal AE is a ferritic iron-chromium-aluminium alloy (FeCrAl alloy) with exceptional form stability and service life in elements with large coil to wire diameter ratio. It is suitable for use at temperatures up to 1300ºC (2370ºF).

Kanthal AE has been developed for conditions of extreme surface loads in fine wire dimensions. It contains trace elements which provides for an extremely well adhering oxide with good emissivity properties.

Typical applications for Kanthal AE are in fast-response elements for ceramic glass top hobs and quartz tube heaters. Due to the dense and well adhering oxide, the alloy is also suitable for applications using close wound coils.

Chemical composition

C % Si % Mn % Cr % Al % Fe %
Nominal composition 5.3 Bal.
Min - - - 20.5 -
Max 0.08 0.7 0.4 23.5 -

Mechanical properties

Wire size Yield strength Tensile strength Elongation Hardness
Ø Rp0.2 Rm A
mm MPa MPa % Hv
1.0 520 720 20 230
Mechanical properties at elevated temperature
Temperature °C 900
MPa 34

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

Creep strength - 1% elongation in 1000 h
Temperature °C 800
MPa 1.2

Physical properties

Density g/cm3 7.15
Electrical resistivity at 20°C Ω mm2/m 1.39
Poisson's ratio 0.30

Young's modulus
Temperature °C 20 100 200 400 600 800 1000
GPa 220 210 205 190 170 150 130
Temperature factor of resistivity
Temperature°C 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Ct 1.00 1.01 1.01 1.02 1.03 1.04 1.04 1.05 1.05 1.06 1.06 1.06 1.06
Coefficient of thermal expansion
Temperature °C Thermal Expansion x 10-6/K
20 - 250 11
20 - 500 12
20 - 750 14
20 - 1000 15
Thermal conductivity
Temperature °C 50 600 800 1000 1200
W m-1 K-1 11 20 22 26 27
Specific heat capacity
Temperature °C 20 200 400 600 800 1000 1200
kJ kg-1 K-1 0.46 0.56 0.63 0.75 0.71 0.72 0.74

Melting point °C 1500
Max continuous operating temperature in air °C 1300
Magnetic properties The material is magnetic up to approximately 600°C (Curie point).
Emissivity - fully oxidized material 0.70

Maximum permissible wire temperature versus coil to wire diameter ratio in supported elements of KANTHAL AE

Temperature measured 15 min. from start

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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