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July 06, 2014 | Tom Ballard

ORNL Invention to Innovation Webinar 3: Austenitic stainless steels

ORNL_outline(EDITOR’S NOTE: This is the next in a series of webinars that Oak Ridge National Laboratory is hosting to provide overviews of various inventions and highlights of specific commercial opportunities approaching market readiness.  Each webinar concludes with a roundtable session for Q&A and market feedback.)


Featured Technology: Cast Alumina Forming Austenitic Stainless Steels

July 16, 2014

Register Here

Oak Ridge National Laboratory (ORNL) has the nation’s most comprehensive materials research program.  From its beginnings in World War II’s Manhattan Project, ORNL has had a distinctive materials science program. Today, materials science research benefits from ORNL’s integration of basic and applied research programs and strong ties among computational science, chemical science, nuclear science and technology, neutron science, engineering, and national security. This broad approach to research is allowing ORNL to develop a variety of new materials for energy applications and transfer these new materials to industry.

Researchers at ORNL recently developed cast alumina-forming austenitic (AFA) stainless steels that comprise an alloy formulation suitable for castings yielding superior high temperature oxidation and creep resistance in a range of energy production and chemical processing applications.  Conventional high-temperature stainless steels rely on chromium oxide (chromia, Cr2O3) surface layers for protection from high-temperature oxidation. Cast AFA alloys comprise aluminum at a weight percentage sufficient to form protective aluminum oxide (alumina, Al2O3) surface layers and have superior corrosion resistance because of several advantages of alumina over chromia surface layers.  Additionally, these novel steels are lower in cost than high performance nickel alloys, are weldable, and possess good high-temperature creep strength (resistance to time dependent elongation) to go along with superior high temperature corrosion resistance. The compositions of the alloys uniquely balance good high-temperature corrosion behavior with creep resistance and can be cast into near-net shape products.


  • Alex DeTrana, Senior Commercialization Manager, Technology Commercialization Group
  • G. Muralidharan, Group Leader, Carbon and Composites Group

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