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 Construction Matieral is an advanced powder-metallurgical, dispersion-strengthened, ferritic iron-chromium-aluminium alloy (FeCrAl alloy) with exceptionally good form stability and oxidation resistance. It is suitable for furnace temperatures up to 1250°C (2282°F).
The alloy offers a unique combination of excellent oxidation properties and form stability at high temperatures. Kanthal® APM construction material has an excellent, non-scaling surface oxide, which gives good protection in most furnace environments, i.e. oxidizing, sulphidizing and carburizing gas, as well as against deposits of carbon, ash, etc.
Typical applications for Kanthal® APM are in high-temperature structural parts in furnaces such as mesh belts, loaders, mounting systems for elements or insulation and loading baskets.
C %
Si %
Mn %
Cr %
Al %
Fe %
Nominal composition
-
-
-
-
5.8
Balance
Min
-
-
-
20.5
-
Max
0.08
0.7
0.4
23.5
-
Wire size Ø
Yield strength Rp0.2
Tensile strength Rm
Elongation A
Hardness
mm (in.)
MPa (ksi)
MPa (ksi)
%
HV
4.0 (0.157)
470 (68)
680 (99)
20
230
Mechanical properties at elevated temperature
Temperature °C (°F)
900 (1652)
1000 (1832)
1100 (2012)
1200 (2192)
1300 (2372)
MPa (psi)
40 (5800)
23 (3335)
16 (2320)
12 (1740)
9 (1305)
Ultimate tensile strength - deformation rate 6.2 x 10-2/min
Creep strength - 1% elongation in 1000 h
Temperature °C (°F)
800 (1472)
900 (1652)
MPa (psi)
8.2 (1189)
3.5 (508)
Creep strength - 0.1% elongation in 1000 h
Temperature °C (°F)
1100 (2012)
1200 (2192)
1300 (2372)
1400 (2552)
MPa (psi)
2.3 (333)
1.2 (174)
0.7 (102)
0.4 (58)
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 (1472 - 1652°F), and to material with coarse grain structure in the temperature range from 1100°C to 1400°C (2012°F to 2552°F). In the delivery state KANTHAL® APM always has a fine grain structure. After use for a certain period of time, the grain size becomes coarse.
Density g/cm3 (lb/in3)
7.10 (0.26)
Electrical resistivity at 20°C Ωmm2/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 K)
11
20
22
26
27
35
Specific heat capacity
Temperature °C
20
200
400
600
800
1000
1200
1400
kJ/(kg K)
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 Ɛ
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®.
