Development of High Creep Strength and Corrosion-Resistant Stainless Steels

Conference · Sat Jan 01 04:00:00 EST 2005

OSTI ID:976009

Pint, Bruce A ^[1]; Maziasz, Philip J ^[1]

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1. ORNL

Type 347 stainless steel foils are commonly used in primary surface recuperators of gas turbines at gas inlet temperatures up to 600 C. At higher temperatures, accelerated attack due to water vapor in the exhaust gas limits performance. Therefore, new low-cost alternative alloys are being developed with sufficient creep and corrosion resistance at 700 C. The laboratory creep and corrosion performance of an initial attempt at a Fe-20Cr-20Ni-base alloy are presented. The addition of 4Mn in this alloy was successful in preventing accelerated attack at 650-700 C; however, it significantly increased the overall oxidation rate and this likely will lead to a long-term durability problem for thin sections of this material.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 976009
• Country of Publication: United States
• Language: English