The need for a steel of suitable strength, weldability, and resistance to brittle fracture for use in heavy-sections in ships of large tonnage prompted the Ship Structure Committee to support a project designed to lay the basis for the selection of a suitable steel. The initial phase of the program was intended to establish suitable testing methods for measuring the resistance of heavy-section steel plates to brittle fracture, and to provide data on the degree to which the level of toughness performance of the steel must be raised to counteract size effects as plate thickness is increased. The second phase of the program, covered by the present report, has been a study of the mechanical properties and weldability of a steel composition which was judged to show promise as a steel for heavy-section ship plate. The steel was chosen on the premise that a simple carbon-manganese steel could be heat-treated to furnish the desired properties including weldability at a lower cost than that of more complex alloy steel grades. Broadly, the steel in thicknesses up to 3 inches was expected to possess the strength, resistance to brittle fracture, and weldability equal to 2-inch normalized ABS Class C steel. While the laboratory tests could not be used to determine the service properties of the steel, they provided a direct comparison of the steel to ABS Class C, whose characteristics and service performance are well-known.

  • Supplemental Notes:
    • Sponsored by the Naval Sea Systems Command, Washington, D.C. 20362.
  • Corporate Authors:

    Ship Structure Committee

    National Academy of Science, 2101 Constitution Avenue, NW
    Washington, DC  United States  20418
  • Authors:
    • Stout, R D
    • Roper, C R
  • Publication Date: 1966-4

Media Info

  • Features: References;
  • Pagination: 26 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00164224
  • Record Type: Publication
  • Source Agency: Ship Structure Committee
  • Report/Paper Numbers: SSC-175 Prog. Rept
  • Contract Numbers: NObs-90188
  • Files: TRIS
  • Created Date: Oct 29 1977 12:00AM