Inventors:
Vinod K. Sikka - Oak Ridge TN
Claudette G. McKamey - Knoxville TN
Assignee:
Martin Marietta Energy Systems, Inc. - Oak Ridge TN
International Classification:
C21D 800
C22C 3806
Abstract:
Iron-aluminum alloys having selectable room-temperature ductilities of greater than 20%, high resistance to oxidation and sulfidation, resistant pitting and corrosion in aqueous solutions, and possessing relatively high yield and ultimate tensile strengths are described. These alloys comprise 8 to 9. 5% aluminum, up to 7% chromium, up to 4% molybdenum, up to 0. 05% carbon, up to 0. 5% of a carbide former such as zirconium, up to 0. 1 yttrium, and the balance iron. These alloys in wrought form are annealed at a selected temperature in the range of 700. degree. C. to about 1100. degree. C. for providing the alloys with selected room-temperature ductilities in the range of 20 to about 29%.