The problems of weld metal or heat affected zone toughness in offshore structural steels

Book · Sun Dec 01 04:00:00 EST 1996

OSTI ID:403627

Hancock, P; Spurrier, J; Chubb, J P ^[1]

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1. Cranfield Univ. (United Kingdom). School of Industrial and Manufacturing Science

An extensive set of fracture toughness results for welded offshore structural steels, gathered from nine separate sponsoring companies, has been entered into a specially constructed database. With over eleven thousand Charpy results and over two thousand CTOD results available, it has been possible to analyze the occurrence of low toughness results with respect to variables such as thickness, PWHT, steel production route etc., even though the individual test programs were not specifically structured to do this. This paper concentrates on the toughness of the weld metal. The data demonstrates that the likelihood of a low toughness result from a CTOD test in weld metal at {minus}10 C is comparable with that from the HAZ region for welded offshore structural steels, and PWHT of the joint is beneficial in reducing the occurrence of low toughness values in the weld metal. It is therefore important that when the HAZ performance is assessed, either through weld procedure tests or plate prequalification procedures, adequate attention is also paid to the weld metal toughness.

• OSTI ID: 403627
• Report Number(s): CONF-9606279--; ISBN 0-7918-1492-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
FRACTURE PROPERTIES
GRAIN SIZE
HEAT TREATMENTS
MECHANICAL TESTS
NUMERICAL DATA
OFFSHORE PLATFORMS
STEELS
UNDERWATER FACILITIES
WELDED JOINTS