Community Research and Development Information Service - CORDIS

Abstract

Weldable offshore steels used in Arctic regions need to have high resistance to crack initiation in the heat affected zone (HAZ) and good crack arrest capability in the parent plate. New steels have been developed for the offshore industries in Norway and the UK using the MMCR processing route. Such steels can be made with lower carbon contents and can consequently exhibit better HAZ toughness at -10 degrees Celsius. A need was therefore identified to examine possible future improvements to these types of steels with a view to identifying compositions capable of meeting the most stringent Arctic requirements at -50 degrees Celsius. The objectives of the work were to identify steel chemistries and processing routes able to meet Arctic offshore HAZ CTOD and parent plate Pellini properties at a design temperature of -50 degrees Celsius. The work was conducted in two phases involving initial studies of HAZ toughness using Gleeble simulation, Charpy and CTOD testing followed by steel processing trials and real weld testing of the most promising compositions.

Additional information

Authors: No author provided, British Steel plc, Swinden Technology Centre, Moorgate, Rotherham (GB);No author provided, ProfilARBED, Esch-sur-Alzette (LU);No author provided, CEMUL, Lisbon (PT);No author provided, TNO Bouw, Delft (NL);No author provided, Thyssen, Duisburg (DE)
Bibliographic Reference: EUR 20028 EN (2001), pp. 78. Euro: 11.50
Availability: Available from EUR-OP sales agent URL: http://eur-op.eu
ISBN: ISBN 92-894-1832-X
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