CONSTRUCTION: 9% NICKEL STEEL FOR LNG APPLICATION

Tensile, impact COD, and wide-plate tests, mainly carried out at -164C, on 9% nickel steel weldments were utilized to predict maximum tolerable defect sizes in cryogenic storage tanks. Results show that at a design stress of 290 N/sq.mm., the tolerable defect size is satisfactorily large. Local distortion at welds is taken into account. Scanning electron microfractographs show that the rate of propagation on cracks during the fatigue cycling at --164C, to which the wide-plate tests were subjected, agrees excellently with fracture mechanics predictions. They also indicate that, during the final static pull to failure, there was no extension of the cracks by stable tearing prior to the propagation of an unstable crack.

• Corporate Authors:

  Welding Institute

  Abingdon Hall
  Cambridge CB1 6AL,   England 
• Authors:
  • Carter, W P
  • Harrison, J C
• Publication Date: 1974-5

Media Info

• Features: References;
• Pagination: p. 158-168
• Serial:
  • Metal Construction and British Welding Journal
  • Volume: 6
  • Issue Number: 5
  • Publisher: Welding Institute

Subject/Index Terms

• TRT Terms: Cracking; Fracture mechanics; Joints; Repeated loads; Welds
• Uncontrolled Terms: Crack propagation; Welded joints
• Old TRIS Terms: Cyclic fatigue
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00057774
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 22 1974 12:00AM