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The principal objective of this project was to assess the HIC resistance of a range of controlled rolled ultralow carbon enhanced alloy content AF/bainitic steels, compared with traditional ferrite-pearlite materials. The various stages of the project are described, including the development of a suitable laboratory slab casting technique giving reproducible centreline segregation, the processing of a number of alloys to strength levels within the range X65-X80, HIC assessment and hydrogen permeation studies, and examination of segregation profiles in relation to compositional variables and HIC development. Finally, the results of a limited HIC assessment of laboratory simulated linepipe seam welds on the ultralow carbon AF/bainite and ferrite-pearlite steels is described.

Additional information

Authors: DEWSNAP R F, British Steel plc, London (GB)
Bibliographic Reference: EUR 12959 EN (1990) 159 pp., FS, ECU 13.75
Availability: (2)
ISBN: ISBN 92-826-1903-6
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