DUCTILITY AND TOUGHNESS OF STAINLESS STEEL WELDS

A series of 18Cr-2Mo ferritic stainless sheet steels was produced to evaluate the influence of interstitial content (carbon and nitrogen) and stabilizing elements (titanium and columbium) on the ductility and toughness of autogenous gas tungsten-arc welds. The aluminum content was also varied in some steels. With stabilizing additions near the minimum required to prevent intergranular corrosion, and about 0.03% total carbon plus nitrogen, excellent ductility and toughness were obtained in 18Cr-2Mo welds. Compared to the columbium alloyed steels, the titanium alloyed steels exhibited a wider range of stabilizing element content over which the alloys were not susceptible to intergranular corrosion or loss in weld ductility. The columbium stabilized weld metals exhibited good impact toughness at all levels of columbium investigated, and the titanium stabilized weld metals exhibited good impact toughness with up to about 0.50% Ti. Aluminum additions significantly lowered the impact transition temperature of a columbium stabilized weld but caused a slight decrease in the ductility. A postweld heat treatment improved the ductility of the high titanium welds but had little effect on the columbium stabilized welds.

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  • Corporate Authors:

    American Welding Society

    2501 NW 7th Street
    Miami, FL  USA  33125
  • Authors:
    • Sawhill, J M
    • Bond, A P
  • Publication Date: 1976

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Subject/Index Terms

Filing Info

  • Accession Number: 00147760
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: May 11 1977 12:00AM