EVALUATION OF IMPROVED MATERIALS AND METHODS OF FABRICATION FOR WELDED STEEL SHIPS

This report covers the work done during the period January 1, 1949, to June 30, 1949. On the basis of the discussion of the work reported in the second progress report, SSC-33, the Project Advisory Committee recommended that the behavior of two additional project steels, "A" and "W" should be determined at various temperatures (200 F to -100 F) using the Kinzel-type specimen. It was also decided that a study would be made to determine the effect of preheat and postheat treatments on the behavior of "B sub r" and "C" steels when tested at various temperatures (200 F to -100 F) using the Kinzel specimen. Tests using the Kinzel specimen to determine the transition-temperature range of "A" and "W" steels rate these two steels in the same order that all the other type specimens have done. The four steels which have now been rated with the welded Kinzel specimen have the following order of increasing transition-temperature range: "B sub r", "W", "A", and "C". When tested with Kinzel-type specimens, but without the weld beads, "B sub r", "W" and "A" behaved very much alike, while "C" had a considerably higher transition-temperature range. The studies on the effect of preheat and postheat on welded Kinzel specimens of "B sub r" and "C" steels revealed tht the "B sub r" steel responded more than "C" steel to the use of preheat. As the preheat was raised, the transition-temperature ranges for both steels were lowered. A postheat treatment improved the amount of energy absorbed by both steels at low temperatures. Vickers hardness serveys of Kinzel specimens of "B sub r" and "C" steels welded at various preheats were made. In the specimens of "B sub r" steel, the weld metal was harder than the heat-affected zone, while the reverse was true for the "C" steel. Both preheat and a high temperature postheat each reduced hardness in both the weld metal and the heat-affected zone.

  • Corporate Authors:

    Battelle Memorial Institute

    505 King Avenue
    Columbus, OH  USA  43201

    Ship Structure Committee

    National Academy of Science, 2101 Constitution Avenue, NW
    Washington, DC  USA  20418
  • Authors:
    • Baysinger, F R
    • Kline, R G
    • Rieppel, I J
    • Voldrich, C B
  • Publication Date: 1950-12-20

Media Info

  • Features: References;
  • Pagination: 41 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00330986
  • Record Type: Publication
  • Source Agency: Ship Structure Committee
  • Report/Paper Numbers: SSC- 36 Prog Rpt.
  • Contract Numbers: NObs-45543, NObs-50148
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM