Case story: Dowa Mining, Japan

The world's first commercial high-temperature continuous carburizing furnace was installed at a Japanese auto parts company with Tubothal electric heating elements combined with Kanthal APM radiant tubes.

A Japanese auto parts customer of the furnace builder Dowa Mining Co. wanted to boost the capacity of their continuous carburizing furnace, which was running at 930°C (1700°F). The challenge was finding a metallic heating system that could reliably operate at much higher temperatures.

Working closely with Kanthal, Dowa's commercial heat treatment furnace building division provided their customer with a heating system with Tubothal electric heating elements and Kanthal APM radiant tube. The Kanthal system was the only metallic heating system capable of working at temperatures of up to the planned 1050°C (1920°F).

Replacing the old nickel-chromium heating elements and tubes with Tubothal heating elements and Kanthal APM radiant tubes, have significantly extended the operating life, while also beefing up the total furnace power and capacity by 30%. Some 18 months after the installation, the Kanthal system had been totally maintenance free.

As a result, the auto parts company had the world's first commercial high-temperature continuous carburizing furnace.

Download Tubothal at Dowa Mining Co (PDF document, 165 kB)