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® APM Strip is an advanced powder-metallurgical, dispersion-strengthened, ferritic iron-chromium-aluminium alloy (FeCrAl alloy) for use at temperatures up to 1425°C (2600°F). The alloy is characterized by exceptionally good form stability and oxidation resistance.
Kanthal® APM strip has low tendency to ageing and low resistance change. It has excellent surface oxide properties, which gives good protection in corrosive atmospheres as well as in atmospheres with high carbon potential, and no scaling.
The unique combination of excellent oxidation properties and form stability contributes to long element service life. The alloy's superior form stability reduces the amount of element support.
Typical applications for Kanthal® APM are electrical heating elements in industrial furnaces.
C %
Si %
Mn %
Cr %
Al %
Fe %
Nominal composition
5.8
Bal.
Min
-
-
-
20.5
-
Max
0.08
0.7
0.4
23.5
-
Thickness
Yield strength
Tensile strength
Elongation
Hardness
Rp0.2
Rm
A
Hv
mm
MPa
MPa
%
1.0
470
680
20
230
Mechanical properties at elevated temperature
Temperature °C
900
1000
1100
1200
1300
MPa
40
23
16
12
9
Ultimate tensile strength - deformation rate 6.2 x 10-2 min-1
Creep strength - 1% elongation in 1000 h
Temperature °C
800
900
MPa
8.2
3.5
Creep strength - 0.1% elongation in 1000 h
Temperature °C
1100
1200
1300
1400
MPa
2.3
1.2
0.7
0.4
Creep rupture strength
Time
800°C
1472°F
1000°C
1832°F
1200°C
2192°F
1400°C
2552°F
h
MPa
psi
MPa
psi
MPa
psi
MPa
psi
100
15.0
2176
5.6
812
3.3
478
1.3
189
1000
11.3
1640
3.4
478
1.6
232
0.5
72
10000
8.2
1190
2.2
320
0.7
100
0.2
30
The data in the tables apply to material with fine grain structure in the temperature range from 800°C to 900°C and to material with coarse grain structure in the temperature range from 1100°C to 1400°C.
Density g/cm3
7.10
Electrical resistivity at 20°C Ω mm2/m
1.45
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
Temp. °C
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
Ct
1.00
1.00
1.00
1.00
1.01
1.02
1.02
1.03
1.03
1.04
1.04
1.04
1.04
1.05
Coefficient of thermal expansion
Temperature °C
Thermal Expansion x 10-6/ K
20 - 250
11
20 - 500
12
20 - 750
14
20 - 1000
15
20 - 1200
16
20 - 1400
16
Thermal Conductivity
Temperature °C
50
600
800
1000
1200
1400
W m-1 K-1
11
20
22
26
27
35
Specific heat capacity
Temperature °C
20
200
400
600
800
1000
1200
1400
kJ kg-1 K-1
0.46
0.56
0.63
0.75
0.71
0.72
0.74
0.80
Melting point °C
1500
Max continuous operating temperature in air °C
1425
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 materials under the trademark Kanthal®.
