Weld metal yield strength testing of girth welds. Final report

Technical Report · Thu Feb 08 04:00:00 EST 1996

OSTI ID:441761

Denys, R M; Lefevre, T ^[1]

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1. Univ. Gent (Belgium). Lab. Soete for Strength of Materials and Welding Technology

The present trend towards higher strength linepipe steels makes weld metal yield strength a consideration as the girth weld deposit can be the weakest region of the weld. Weld metal yield strength is also a key element in girth weld defect engineering critical assessments. The development of a reliable test procedure for determining the actual transverse weld metal yield strength in both undermatching and overmatching welds is therefore needed. The objective of the present investigation was to develop a testing procedure which could be used to measure the weld metal yield strength in the transverse direction and which would have technical advantages over any commonly used test for measuring weld metal yield strength. This report describes the new test procedures for obtaining a representative measure of the full thickness girth weld metal yield strength in the transverse direction. The methods are based on the testing of an instrumented standard transverse weld specimen for undermatching welds and of a double edge notched transverse weld specimen for overmatching welds.

• Research Organization: Ghent Rijksuniversiteit (Belgium). Lab. Soete
• Sponsoring Organization: American Gas Association, Inc., Arlington, VA (United States)
• OSTI ID: 441761
• Report Number(s): AGA--97003261
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
36 MATERIALS SCIENCE
CARBON STEELS
EXPERIMENTAL DATA
MECHANICAL TESTS
NATURAL GAS DISTRIBUTION SYSTEMS
PIPELINES
PROGRESS REPORT
WELDED JOINTS
YIELD STRENGTH