The effects of aging for 50,000 hours at 343{degree}C on the mechanical properties of Type 308 stainless steel weldments

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The effects of long-term aging at intermediate temperature on the mechanical properties of type 308 stainless steel weld metals have been studied. Three multipass shielded metal-arc welds with ferrite levels of 4, 8, or 12% were aged up to 50,000 h at 343{degrees}C. Tensile and Charpy V-notch specimens were used to determine the effects of aging on the mechanical properties of the weld metal. Aging had little effect on the yield strength of the weld metal, but did result in a slight increase (approximately 5%) in the ultimate tensile strength. The ferrite content had little effect on the yield strength ... continued below

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15 p.

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Alexander, D. J. & Nanstad, R. K. December 1, 1995.

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The effects of long-term aging at intermediate temperature on the mechanical properties of type 308 stainless steel weld metals have been studied. Three multipass shielded metal-arc welds with ferrite levels of 4, 8, or 12% were aged up to 50,000 h at 343{degrees}C. Tensile and Charpy V-notch specimens were used to determine the effects of aging on the mechanical properties of the weld metal. Aging had little effect on the yield strength of the weld metal, but did result in a slight increase (approximately 5%) in the ultimate tensile strength. The ferrite content had little effect on the yield strength of the materials, but the ultimate tensile strength increased slightly with higher ferrite content. In contrast to the small effect on the tensile properties, the impact properties were significantly degraded by aging. The extent of the degradation increased with increasing ferrite content and continued to increase with increasing aging time, Spinodal decomposition and the precipitation of G-phase particles in the ferrite phase are believed to be responsible for the degradation of the mechanical properties.

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15 p.

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OSTI as DE96003030

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  • 7. international symposium on environmental degradation of materials in nuclear power plants: water reactors, Breckenridge, CO (United States), 6-10 Aug 1995

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  • Other: DE96003030
  • Report No.: CONF-950816--6
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 168360
  • Archival Resource Key: ark:/67531/metadc622266

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  • December 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Oct. 3, 2017, 4:28 p.m.

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Alexander, D. J. & Nanstad, R. K. The effects of aging for 50,000 hours at 343{degree}C on the mechanical properties of Type 308 stainless steel weldments, article, December 1, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc622266/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.