Advanced Materials


Alumina-forming Austenitic Alloys

ORNL's Alumina-forming Austenitic Alloys Licensed to Carpenter Technology Corporation

Carpenter Technology Corporation has licensed a new alloy developed at the Oak Ridge National Laboratory. Carpenter Technology Corporation is a leader in the development, manufacture and distribution of cast/wrought and powder metal stainless steels and specialty alloys including high temperature (iron-nickel-cobalt base), stainless, superior corrosion resistant, controlled expansion alloys, ultra high-strength and implantable alloys, tool and die steels, and other specialty metals as well as cast/wrought titanium alloys.

The new alloy, developed at ORNL by Phil Maziasz, Bruce Pint, Michael Brady, Zhaoping Lu, Chain-tsuan Liu, and Yukinori Yamamoto, is unique in that the composition allows for alumina scales to form on the exterior of the steel, which provides significant oxidation resistance. In addition, the alloy displays excellent creep strength at high temperatures (700-800 Celsius). While some of these characteristics may be found in existing alloys, this new alloy can be produced at a lower price than other existing alloys which require high amounts of nickel.

Any application in which high temperatures or corrosive environments are encountered could be a potential application of this technology. Some examples include recuperators and heat exchangers, down hole drilling, and chemical processing equipment and materials. The agreement with Carpenter allows for the sale of the alloy in a variety of bulk forms that have been vacuum melted.




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