AFA: Alumina-Forming Austenitic Stainless Steels


AFA stainless steels boast an increased upper-temperature oxidation, or corrosion, limit that is 100 to 400 degrees Fahrenheit higher than that of conventional stainless steels. These new alloys deliver this superior oxidation resistance with high-temperature strengths approaching that of far more expensive nickel-based alloys without sacrificing the typical lower cost, formability and weldability of conventional stainless steels.

  Iron-base AFA alloys deliver excellent high-temperature oxidation resistance at two to three times lower cost than conventional nickel-base alloys.
  AFA can be used in the fabrication of recuperator air cells such as those utilized in the Solar Turbine Mercury 50, which operates at 38% efficiency

Company Interactions:

  • Carpenter Technology Corporation
  • Solar Turbines Incorporated
  • Capstone Tubine Corporation

Sponsors of the research and Development effort include the U.S. Department of Energy, Office of Fossil Energy Advanced Research Materials Program, Office of Energy Efficiency and Renewable Energy, Industrial Technologies Program, Distributed Energy Program, and the Laboratory Directed Research and Development Program of the Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Deparment of Energy.




For a Poster on this R&D Award-winning technology (PDF 3.2 MB)






Contact: Bruce Pint,, (865) 576-2897


 Oak Ridge National Laboratory