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Abstract

An evaluation has been made of the properties obtainable from elementally substituted martensitic stainless steels, the objective being to achieve properties comparable with those of an established 12%CrMoVNb steel in a composition that would allow hands-on recycling after 100y storage. Tungsten and increased contents of vanadium have been identified as alternative strengthening additions and their effects on the structure and properties of 0.15%C, 9 and 11%Cr steels have been studied. The closest approach to the reference steel was obtained with a composition of 11% Cr, 3% W and 0.24% V, which gave 0.1% proof strengths of 100 MPa and 490 MPa and room temperature and 500 degrees C. In all the steels studied, the principal precipitate at 675 degrees C was M|2|3C|6 carbide. The Laves phase M|2W was formed in the 3%W steels averaged at 675 degrees C and this, together with the relatively coarse prior austenite grain size, probably accounts for the comparatively low toughness in the averaged condition. It is concluded that 9 and 11%Cr, 1- 3.0%W, 0.25-0.5%V steels form the basis for further development of low activity martensitic alloys.

Additional information

Authors: DULIEU D, BRITISH STEEL CORPORATION, SWINDEN LABORATORIES, ROTHERHAM (UK);CULHAM LABORATORY, ABINGDON (UK);TUPHOLME K W, BRITISH STEEL CORPORATION, SWINDEN LABORATORIES, ROTHERHAM (UK);CULHAM LABORATORY, ABINGDON (UK);BUTTERWORTH G J BRITISH STEEL CORPORATION, SWINDEN LABORATORIES, ROTHERHAM (UK), BRITISH STEEL CORPORATION, SWINDEN LABORATORIES, ROTHERHAM (UK);CULHAM LABORATORY, ABINGDON (UK);CULHAM LABORATORY, ABINGDON (UK), BRITISH STEEL CORPORATION, SWINDEN LABORATORIES, ROTHERHAM (UK);CULHAM LABORATORY, ABINGDON (UK)
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON OX14 3DB (UK), MENTIONING REPORT CLM-P771, 1986
Record Number: 1989124095200 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en