The main objective was to determine the extent to which post World War II steels have been improved, based principally on a comparison of their Charpy V-notch properties with those established by the National Bureau of Standards for fractured plates from World War II ships. The initial part of the program (prior to 1956) covered plate procurred to the requirements of the 1948 ABS Rules and included 37 samples of Class A, 81 of Class B and 14 of Class C. In view of the 1956 changes in the ABS Rules, the sampling program was extended to cover primarily the new Class B type but some additional samples of Class C were included to supplement the relatively small number received in the previous sampling. The extended program included 76 samples of Class B and 12 of Class C. The results of the survey indicate that since the 1956 revision of the ABS Rules for Ship Steel, the range and average transition temperatures (15 ft-lb Charpy V) for the new material have been found to be -40 to 29 F and 2 F, respectively, for ABS Class B plates, and -46 to 13 F and -13 F, respectively, for ABS Class C plates, as compared with an average of 90 F for World War II fracture-source plates and 68 F for fracture-through plates.

  • Corporate Authors:

    New York Naval Shipyard

    Material Laboratory
    Brooklyn, NY  United States 

    Ship Structure Committee

    National Academy of Science, 2101 Constitution Avenue, NW
    Washington, DC  United States  20418
  • Authors:
    • Gabriel, J J
    • Imbembo, E A
  • Publication Date: 1962-10-1

Media Info

  • Features: References;
  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00331925
  • Record Type: Publication
  • Source Agency: Ship Structure Committee
  • Report/Paper Numbers: SSC-142 Final Rpt.
  • Contract Numbers: NObs-84321
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM