Technical data for Kanthal® technical ceramics

The Kanthal® program of technical ceramics include three different types of ceramics, all manufactured using raw materials of the highest quality and not containing conductive ingredients.

Kanthal® types of technical ceramics:

  • Aluminosilicates (Kanthal code A42P)
  • Aluminous (Kanthal codes A60P, A50C, A73E, A80E)
  • Cordierites (Kanthal code A38E)

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A42PA60PA50CA73/80EA38E
Max. operating temp. 1200°C (2190°F) 1300°C (2370°F) 1300°C (2370°F) 1300°C (2370°F) 1200°C (2190°F)
H2O absorption as % value 12-18 12-18 12-18 12-18 12-18
Bulk density, g/cm3 (lbs/in3) 1.9 (0.07) 2.2 (0.08) 2.0 (0.07) 2.2 (0.08) 1.9 (0.07)
Thermal conductivity, W/mK 20-1000°C (68-1830°F) 460-627 627-836 460-627 627-836 460-585
Cold compression strength, kg/cm2 (lbs/in2) 300 (4267) 400 (5689) 300 (4267) 400 (5689) 300 (4267)
Specific heat, kcal/kg/°C 100-1000°C (210-1830°F) 0.2 0.2 0.2 0.2 0.2
Thermal shock resistance Good Good Good Good Excellent
Thermal expansion coefficient x 10-6 6.5 6.5 6.5 6.5 6.5
Resistivity 10-100 MΩ cm 400°C (750°F)
1-10 MΩ cm 600°C (1110°F)
0.1-1 MΩ cm 800°C (1470°F)
10-100 kΩ cm 1000°C (1830°F)
Nominal content of chemical ingredients
A38EA73EA80EA42PA60PA50C
SiO2 53.2 21 12.4 47.2 30.5 37.8
Al2O3 38 73 82.2 43 60 53.5
Fe2O3 0.9 0.6 0.5 0.9 0.9 0.8
MgO 4 0.2 0.2 0.4 0.3 <0.1
TiO 0.5 0.4 0.4 0.4 0.7 0.3
CaO 0.2 <0.1 <0.1 0.4 0.3 <0.1
K2O 1.2 <0.1 <0.1 0.3 0.9 3.2
Na2O <0.1 <0.1 <0.1 0.2 0.1 0.1
LiO <0.1 <0.1 0.3 <0.1 <0.1 <0.1