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

Kanthal D (Resistance heating wire and resistance wire)

Datasheet updated 2012-06-20 12:45:53 (supersedes all previous editions)

Kanthal D is a ferritic iron-chromium-aluminium alloy (FeCrAl alloy) for use at temperatures up to 1300°C (2370°F). The alloy is characterized by high resistivity and good oxidation resistance.

Kanthal D is used in home appliances and industrial furnaces. Typical applications in home appliances include metal sheathed tubular elements for dishwashers, elements embedded in ceramics for panel heaters, cartridge elements in metal dies, heating cables and rope heaters in defrosting and deicing elements, mica elements used in irons, quartz tube heaters for space heating, industrial infrared dryers, in coils on molded ceramic fibre for boiling plates with ceramic hobs, in bead insulated coils for panel heaters, in suspended coil elements for air heaters in laundry dryers.

In industrial applications Kanthal D is used in, for example, terminals to furnace elements, porcupine elements for air heating, and in furnace heating elements.

Chemical composition

C % Si % Mn % Cr % Al % Fe %
Nominal composition 4.8 Bal.
Min - - - 20.5 -
Max 0.08 0.7 0.5 23.5 -

Mechanical properties

Wire size Yield strength Tensile strength Elongation Hardness
Ø Rp0.2 Rm A
mm MPa MPa % Hv
1.0 485 670 23 230
4.0 450 650 18 230

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 800 900
MPa 1.2 0.5

Physical properties

Density g/cm3 7.25
Electrical resistivity at 20°C Ω mm2/m 1.35
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 1.05 1.06 1.07 1.07 1.07 1.08 1.08

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

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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