U and W shaped radiant tubes
U- and W-shaped radiant tubes in three basic designs. The Kanthal range covers all nickel-chromium (NrCr) steels for high temperatures, powder metallurgy steels for extremely demanding environments, and combinations of the two.
The flexible approach to material choice means that Sandvik can offer the optimal cost-efficiency depending on key factors as desired life-length, furnace atmosphere and process temperature.
Radiant tubing for very high temperatures and severe conditions
Using solutions based on complete Kanthal APM or Kanthal APMT tubes opens up new possibilities to increase furnace temperatures and to cope with extremely demanding conditions.
Tubes made of Kanthal APM or Kanthal APMT are designed to support higher temperatures as well as carburizing and sulfidizing atmospheres. Their life is therefore longer than conventional radiant tube alloys.
Radiant tubing for tougher conditions at the burner leg
Since the temperature falls with the distance from the burner, in some cases the optimal design may be to use Kanthal APM or Kanthal APMT for the burner leg and a nickel-chromium (NiCr) alloy for the bend and the return tube. Sandvik has delivered mixed material radiant tube solutions since 2008, with excellent result.
Radiant tubing for medium high temperatures
When furnace conditions are not too severe, a traditional NiCr solution can prove to be the most economical choice. A solution with 253 MA* or 353 MA* in the straight tubes together with a cast FeNiCr bend is useful for many applications. Of the two, 353 MA is the best choice for carburizing or nitriding atmospheres.
* 253 MA and 353 MA are trademarks owned by Outokumpu Stainless.
Article functions
Related information
Call us
Email usWant to improve your process?
If you want to improve your productivity or end-product, our heating experts can help you.
Read more about our technical services
