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A programme of study, aimed at deriving data on the avoidance of weld metal hydrogen-induced cracking, has been carried out by the Institut de Soudure and the Welding Institute, the intention being to allow full exploitation of the improved weldability, i.e. reduced risk of HAZ hydrogen-induced cracking of some of the newer, low carbon equivalent steels. Two steel types, E355 (25 and 56 mm thick) and E500 (25 and 75 mm thick), with yield strengths of approx. 390 and 570 mm MPa respectively, were employed. These steels were reputed to have a low risk of HAZ hydrogen-induced cracking. Single weld beads were investigated by means of the Tekken and LBTRC tests, and multiple-pass welds were employed to study the risk of transverse weld metal hydrogen-induced cracking. The results confirm the importance of low weld hydrogen levels in maintaining a low risk of weld metal hydrogen-induced cracking. Pertinent data have been derived for the welding consumables studied.

Additional information

Authors: MALTRUD F, Institut de Soudure, Paris (FR);DEBIEZ S, Institut de Soudure, Paris (FR)
Bibliographic Reference: EUR 12369 FR (1990) 43 pp., MF, ECU 4, blow-up copy ECU 6.25
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