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 materials under the trademark Kanthal®.
Kanthal® AE wire 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.
C %
Si %
Mn %
Cr %
Al %
Fe %
Nominal composition
5.3
Bal.
Min
-
-
-
20.5
-
Max
0.08
0.7
0.4
23.5
-
Wire size
Yield strength
Tensile strength
Elongation
Hardness
Ø
Rp0.2
Rm
A
mm (in)
MPa (ksi)
MPa (ksi)
%
Hv
1.0 (0.04
520 (75)
720 (104)
20
230
Mechanical properties at elevated temperature
Temperature °C (°F)
900 (1652)
MPa (ksi)
34 (4.9)
Ultimate tensile strength - deformation rate 6.2 x 10-2/min
Creep strength - 1% elongation in 1000 h
Temperature °C (°F)
800 (1472)
MPa (psi)
1.2 (170)
Density g/cm3 (lb/in3)
7.15 (0.258)
Electrical resistivity at 20°C Ω mm2/m (Ω circ. mil/ft)
1.39 (836)
Poisson's ratio
0.30
Young's modulus
Temperature °C
20
100
200
400
600
800
1000
Temperature °F
68
212
392
752
1112
1472
1832
GPa
220
210
205
190
170
150
130
Msi
32
30
30
28
25
22
19
Temperature factor of resistivity
Temperature °C
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
Temperature °F
212
392
572
752
932
1112
1292
1472
1652
1832
2012
2192
2372
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 (°F)
Thermal Expansion x 10-6/K (10-6 /°F)
20 - 250 (68-482)
11 (6.1)
20 - 500 (68-932)
12 (6.7)
20 - 750 (68-1382)
14 (7.8)
20 - 1000 (68-1832)
15 (8.3)
Thermal conductivity
Temperature °C
50
600
800
1000
1200
Temperature °F
122
1112
1472
1832
2192
W m-1 K-1
11
20
22
26
27
Btu h-1ft-1°F-1
6.4
11.6
12.7
15.0
15.6
Specific heat capacity
Temperature °C
20
200
400
600
800
1000
1200
Temperature °F
68
392
752
1112
1472
1832
2192
kJ kg-1 K-1
0.46
0.56
0.63
0.75
0.71
0.72
0.74
Btu lb-1 °F-1
0.11
0.13
0.15
0.18
0.17
0.17
0.18
Melting point °C (°F)
1500 (2732)
Max continuous operating temperature in air °C (°F)
1300 (2372)
Magnetic properties
The material is magnetic up to approximately 600°C (1112°F) (Curie point).
Emissivity - fully oxidized material
0.70
Maximum permissible wire temperature versus coil to wire diameterratio 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 materials under the trademark Kanthal®.
Temperature measured 15 min. from start