Extruded tubes made from Kanthal APMT and Kanthal APM iron-chromium-aluminium (FeCrAl) and nickel-chromium (NiCr) alloys for gas-heated or electrically heated furnaces.Kanthal furnace tubes can be used at temperatures up to 1250C (2280F) and are available in sizes from 26 to 260 mm (1.02-10.2 in.) outside diameter. Kanthal APM and Kanthal APMT furnace tubes, as well as other Sandvik high-temperature tubes, are suitable for use as, for example: