Evaluation of methods to predict safe welding conditions and maximum HAZ hardness in steel welding

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Journal of Offshore Mechanics and Arctic Engineering

DOI:https://doi.org/10.1115/1.2826990· OSTI ID:31886

Tronskar, J P ^[1]

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1. Det Norske Veritas Industry, Oslo (Norway)

During the last ten years new structural steels of improved weldability have been introduced. In particular, structural steels for the fabrication of offshore structures have been greatly improved in this respect throughout this period. These steels have lean chemical compositions which are generally outside the range for which the existing HAZ hardness criteria and the International Institute of Welding carbon equivalent (CEIIW) formula were originally developed. This paper presents the results from investigations of the weldability of three normalized (R{sub e} min 350 MPa) and three quenched and tempered (R{sub e} min 500 MPa) offshore structural steels. Weldability testing was conducted to study the relative performance of the different steels and to obtain a comparison between the capability of the different methods to predict safe welding conditions to avoid cold cracking in steel welding. It has become a widespread practice in welding high-strength steels to incorporate maximum HAZ hardness restrictions in fabrication specifications, particularly so in the offshore industry. This paper presents some of the more successful approaches proposed to date and compares their performance.

• Sponsoring Organization: USDOE
• OSTI ID: 31886
• Journal Information: Journal of Offshore Mechanics and Arctic Engineering, Journal Name: Journal of Offshore Mechanics and Arctic Engineering Journal Issue: 1 Vol. 117; ISSN 0892-7219; ISSN JMOEEX
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CRACK PROPAGATION
FRACTURE MECHANICS
MATERIALS TESTING
OFFSHORE PLATFORMS
PERFORMANCE
STEELS
WELDABILITY
WELDED JOINTS