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

Kanthal A (Ribbon (flat wire))

Datasheet updated 2012-06-20 12:47:11 (supersedes all previous editions)

Kanthal A is a ferritic iron-chromium-aluminium alloy (FeCrAl alloy) with high resistivity and good oxidation resistance for use at temperatures up to 1350°C (2460°F).

Kanthal A is typically used in industrial furnaces and home appliances. Examples of applications are elements embedded in ceramics for panel heaters, infrared heaters, warming plates, irons, ceramic pots, in cartridge heaters for liquid heating, storage heaters, in ceramic heaters for cooking plates, air guns, hobby kilns, radiators, in quartz tube heaters for space heating, toasters, toaster ovens, grills, industrial infrared dryers, coils on molded ceramic fibre for cooking plates with ceramic hobs.

Chemical composition

C % Si % Mn % Cr % Al % Fe %
Nominal composition 5.3 Bal.
Min - - - 20.5 -
Max 0.08 0.7 0.5 23.5 -

Mechanical properties

Thickness Yield strength Tensile strength Elongation Hardness
Rp0.2 Rm A
mm MPa MPa % Hv
0.5 505 725 17 230
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 1000
MPa 1.2 0.5

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 1350
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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