STUDY OF THE FACTORS WHICH AFFECT THE ADEQUACY OF HIGH-STRENGTH, LOW-ALLOY STEEL WELDMENTS FOR CARGO SHIP HULLS

High-strength, low-alloy quenched and tempered steels of 100,000-psi minimum yield strength are being used in ship hull structures. A project was initiated by the Ship Structure Committee to define which mechanical properties should be used as performance criteria, to evaluate the suitability of these criteria with large-scale test weldments, and to select small-scale laboratory tests that correlate with the large-scale tests. A survey of available mechanical property data and of the use of these materials at various shipyards led to the recommendation that certain laboratory investigations be conducted. This report describes the results of both small-scale and large-scale tests conducted on high-strength, low-alloy plate and weldments. These tests demonstrated that 8 in. long flaws can initiate fast fracture at stresses below the yield strength of the material, that structural fracture resistance is increased by stiffeners, and that weldments can have fracture resistance equal to that of the base plate.

• Corporate Authors:

  Ship Structure Committee

  National Academy of Science, 2101 Constitution Avenue, NW
  Washington, DC  United States  20418
• Authors:
  • NORRIS, E B
  • Pickett, A G
  • Wylie, R D
• Publication Date: 1972-7

Media Info

• Features: References;
• Pagination: 30 p.

Subject/Index Terms

• TRT Terms: Defects; Fracture mechanics; Structural steel; Welds
• Identifier Terms: Ship Structure Committee
• Uncontrolled Terms: Weld defects
• Old TRIS Terms: Weld properties
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00040602
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: SSC-232
• Contract Numbers: N00024-67-C-5416
• Files: TRIS
• Created Date: Jan 5 1973 12:00AM