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'Super' Stainless Steel Developed

Date:
June 21, 2007
Source:
DOE/Oak Ridge National Laboratory
Summary:
A new type of stainless steel alloy could allow for significantly increased operating temperatures and corresponding increases in efficiency in future energy production systems.

Creep test specimen of HTUPS-4 (Fe-20Ni-14Cr-2.5Al wt.% base) after creep-rupture test at 750oC/100MPa/2191h/air. Very little oxide scale formation is evident.
Credit: Image courtesy of DOE/Oak Ridge National Laboratory

A new type of stainless steel alloy developed at Oak Ridge National Laboratory could allow for significantly increased operating temperatures and corresponding increases in efficiency in future energy production systems.

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The new alloys offer superior oxidation resistance compared to conventional stainless steels, without significant increased cost or decreased creep resistance (sagging at high temperature).

What sets this proprietary material apart from other stainless steels is its ability to form protective aluminum oxide scales instead of chromium oxide scales. The combination of creep and oxidation resistance offered by these alloys previously was available only with nickel-base alloys, which are about five times more costly than the new stainless steels.

This material also has potential applications in high-temperature (up to 800 degrees Celsius) chemical and process industry applications.

The material was reported on in the April 20 issue of Science. Funding for this research was provided by the Department of Energy's Office of Fossil Energy, Advanced Research Materials Program. Additional funding was received from DOE's Distributed Energy Program, the Division of Materials Sciences and Engineering, Office of Basic Energy Sciences and the SHaRE User Facility.


Story Source:

The above story is based on materials provided by DOE/Oak Ridge National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

DOE/Oak Ridge National Laboratory. "'Super' Stainless Steel Developed." ScienceDaily. ScienceDaily, 21 June 2007. <www.sciencedaily.com/releases/2007/06/070620124302.htm>.
DOE/Oak Ridge National Laboratory. (2007, June 21). 'Super' Stainless Steel Developed. ScienceDaily. Retrieved March 1, 2015 from www.sciencedaily.com/releases/2007/06/070620124302.htm
DOE/Oak Ridge National Laboratory. "'Super' Stainless Steel Developed." ScienceDaily. www.sciencedaily.com/releases/2007/06/070620124302.htm (accessed March 1, 2015).

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