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Treatment of High Temperature Tensile Data for Alloy 617 and Alloy 230

[+] Author Affiliations
T.-L. Sham

Oak Ridge National Laboratory, Oak Ridge, TN

D. R. Eno, K. P. Jensen

Lockheed Martin Corporation, Schenectady, NY

Paper No. PVP2008-61128, pp. 767-776; 10 pages
doi:10.1115/PVP2008-61128
From:
  • ASME 2008 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Chicago, Illinois, USA, July 27–31, 2008
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4829-6
  • Copyright © 2008 by ASME and Lockheed Martin Corporation

abstract

Yield strength and tensile strength at temperature are used to set time independent primary stress limits for structural materials in various high temperature design codes. For the Ni-based Alloy 617 and HAYNES® 230® alloy (Alloy 230), the temperature trends for the yield strength and tensile strength change significantly above around 1100K and 1025K, respectively, from the lower temperature trends. It is shown that standard methods in obtaining design values for these parameters for Very High Temperature Reactor applications are not satisfactory. Improved methods for the treatment of tensile data are proposed, resulting in more consistent and quantifiable design margin over the full range of low to high temperatures.

Copyright © 2008 by ASME and Lockheed Martin Corporation

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