MILL SAMPLING TECHNIQUES FOR QUALITY DETERMINATION OF SHIP PLATE STEEL

In order to obtain information on the variation of mechanical properties within typical heats of currently produced ship plate steel, 54 plates from 6 heats were obtained from two producers, United States Steel Corporation and Bethlehem Steel Company. The former contributed 27 plates of 3/4-in. ABS-Class B, and the latter contributed 27 plates of 1-1/4-in. ABS-Class C. All were made to the ABS Specification in effect prior to February 1, 1956. A sample of 24 of these plates was selected to provide data on the variations among plates, ingots, and heats. Five additional plates were subsequently tested to resolve doubtful cases. Although primary interest was on the notch toughness characteristics, the static tensile properties, ferrite grain size, and chemical composition were also measured. In addition, the severity and extent of segregation in some of the plates was studied, and the influence of segregation on impact test results was examined. Analysis of the results on the 29 plates indicates that the mechanical properties of plates in an entire heat can be satisfactorily evaluated by tests on two properly chosen sample plates.

  • Corporate Authors:

    National Bureau of Standards

    Gaithersburg, MD  USA 

    Ship Structure Committee

    National Academy of Science, 2101 Constitution Avenue, NW
    Washington, DC  USA  20418
  • Authors:
    • Staugaitis, C L
  • Publication Date: 1958-1-31

Media Info

  • Features: References;
  • Pagination: 44 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00331716
  • Record Type: Publication
  • Source Agency: Ship Structure Committee
  • Report/Paper Numbers: SSC-106 Prog Rpt.
  • Contract Numbers: NObs-72046
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM