Kanthal® APM and Kanthal APMT FeCrAl alloys
Kanthal® APM and Kanthal® APMT iron-chromium-aluminium (FeCrAl) alloys can be used at tube temperatures up to 1250°C (2282°F). They offer several advantages compared to other tube materials such as alumina, silicon carbide and nickel-chromium (NiCr) alloys.
User benefits include superior resistance to, for example, carburization, thermal shock, sagging and distortion. This is due to the materials' excellent mechanical properties* and their capability of forming a dense and adherent oxide film that protects against corrosion and atmospheric attack.
The service life of Kanthal® APM and Kanthal® APMT furnace tubes is often many times longer than that of nickel-chromium (NiCr) alloy-based tubes.
Main characteristics of Kanthal APM and Kanthal APMT FeCrAl alloys
- Excellent form stability
- Excellent corrosion resistance in most atmospheres
- High thermal conductivity
- No scaling and impurities
- Longer tube life
Radiant tubes in Kanthal® APM and Kanthal® APMT are available from stock in many sizes. View stock standard sizes and tolerances
* Kanthal APMT offers higher hot strength than Kanthal APM which makes the grade even more resistant to sagging.
|Grade||Maximum temperature 1)||Rkm 10000 2)|
|Kanthal APM||1250°C (2280°F)||0.9|
1) The material can withstand temperatures up to 1425°C (2600°F). The table shows recommended maximum tube temperature.
2) Creep rupture strength 10000 h MPa (N/mm2) at 1100°C (2010°F).