An Assessment of an Alternative Submarine Steel


  1. Butler, J.J.F.
  2. DuFrane, J.J.
  3. George, K.B.
  4. Bird, J.
Corporate Authors
Defence Evaluation and Research Agency, Rosyth (England);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Steel used in submarine construction has, over the past fifty years, developed from mild steel through Q1N/HY80 in the UK and US navies, HY100/HLES80/BIS812 respectively in the US, French and Australian navies and HLES100 in the French navy. Variants of these which have been considered and evaluated have included HLES65 and HSLA80 at the 550MPa 0.2% proof strength level and HSLA100 at the 690MPa 0.2% proof strength level. The HSLA steels were specifically designed to reduce cost and be more easily weldable, namely with reduced preheat. Unfortunately these steels have not lived up to the earlier promise and the expected full cost savings potential has not been met. Some amongst the naval fraternity have continued an optimistic approach to finding a more construction friendly steel and have been looking at a number of offshore steels, X65, X70, X80 and X100 as possible contenders. This paper looks at one such steel Shoralsim 500, a development of an offshore grade, exhibiting adequate strength, outstanding toughness, increased weldability and with a significant potential for reduced fabrication cost.
Shoralsim 500
Report Number
DREA-SR-1999-162-PAP-39 — CONTAINED IN CA000150
Date of publication
01 Oct 1999
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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