Case story: Lark Heat Treating, US

A Texas-based heat treatment company replaced their nickel-chromium radiant tubes in one of its two furnaces with Kanthal APM radiant tubes. Result: higher processing speeds and an increase of firing cycles - plus three to five times longer tube life.

After many years using nickel–chromium alloy radiant tubes in its two gas fired pit furnaces, a commercial heat-treater in Texas specializing in services to the oil, gas and petrochemical industries decided to replace the tubes in one of their furnaces with Kanthal APM radiant tubes.

The nickel-chromium alloy tubes lasted about six years on average and could maintain temperatures between 430°C and 1040°C (800-1900°F). Very soon, the Kanthal APM tubes enabled the furnace to increase processing speed and an increase of firing cycles.

Due to the higher operating temperature capability of the Kanthal APM radiant tubes 1250°C [2280°F] compared to 1040°C [1900°F]) and a tube service life that is three to five times longer, the company decided to convert the tubes in their second pit furnace to Kanthal APM tubes.

Download Kanthal APM at Lark Heat Treating (PDF document, 128 kB)