Furnace tubes

Kanthal® radiant tubes, made from advanced Kanthal® APM and Kanthal® APMT FeCrAl alloys, are designed for maximum reliability in demanding industrial heating environments. With proven resistance to carburization, thermal shock, sagging, and distortion, these tubes deliver longer service life and higher power output than traditional NiCr, ceramic, or silicon carbide alternatives. Available as complete, ready-to-install assemblies tailored to customer specifications, Kanthal® radiant tubes help reduce maintenance needs while ensuring consistent performance.

Kanthal® APM and Kanthal® APMT alloys set the standard for high-temperature furnace tubes, combining excellent form stability, corrosion resistance, and thermal conductivity. Operating at tube temperatures up to 1,250°C (2,282°F), these FeCrAl alloys outperform alumina, silicon carbide, and NiCr alternatives. The protective oxide layer formed on the surface ensures long-lasting reliability. Kanthal® APMT provides even higher hot strength than Kanthal® APM, extending tube service life in the most demanding industrial environments.

Kanthal® AF radiant tubes bring a new level of efficiency and reliability to high-temperature furnaces. Designed to outperform traditional NiCr tubes, they combine excellent oxidation resistance with reduced wall thickness for faster heat response and greater energy efficiency. Kanthal® AF tubes are made of a ferritic iron-chromium-aluminum alloy (FeCrAl). Designed for vertical installation, the tubes are spiral-welded, ensuring they have symmetrical properties from every angle. Tested extensively, they represent the latest innovation in Kanthal’s radiant tube portfolio.

Kanthal® U and W-shaped radiant tubes are designed for demanding furnace environments, withstanding tube temperatures up to 1,250°C (2,280°F). Available in nickel-chromium (NiCr) alloys, Kanthal® APM, and Kanthal® APMT FeCrAl alloys, or a combination of the two, these tubes are flexible to match virtually any furnace atmosphere, process temperature, or installation design. Our offer includes radiant tubes for very high temperatures and severe conditions, tougher conditions at the burner leg, and medium to high temperature applications.