DEVELOPMENT OF CAN/MIL HYW700QT STEEL

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Authors
  1. Labbe, G.R.
  2. Rene, R.
  3. Porter, J.F.
  4. Billard, C.E.
Corporate Authors
Department of National Defence, Ottawa ONT (CAN) Director Ship Engineering;Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
As directed by the Scientific Authority, and contracted out to M.I.L. Davie Inc., Levis, Quebec, the goal of this project was to develop a Canadian technology for the production of an high strength weldable steel, primarily for pressure hull application, as well as, for surface fleet and/or offshore application using a lower thickness process. A history of the first phase of the project will be covered, including the establishment of a consortium to produce quenched and tempered rolled plates, the mechanical properties of the steel, and the characterization of the steel with regards to welding cycles. The initial phase of Explosion Bulge Test will be discussed. A way ahead for the next phases, including filler material and weld evaluation will also be discussed as conclusion. The consortium which is composed of SLATER STEEL as slab producer, IPSCO Inc., as roller, and ALGOMA STEEL as heat treater was established by the prime contractor. Approximately 31 metric tons of heat treated steel plates were acquired for evaluation. Promising mechanical properties were found such as yield strength (> 118 ksi), charpy at -85C (> 37 ft-lb), and dynamic tear values at -40 degrees (500 ft-lb). Also, nil ductility temperature was found below -100C, which makes the steel ideal for low temperature applications. TRUNCATED
Report Number
DREA-NAMT-93-6-PAP-23 — CONTAINED IN 99-00578
Date of publication
30 Apr 1993
Number of Pages
39
DSTKIM No
99-00602
CANDIS No
510328
Format(s):
Hardcopy;Document Image stored on Optical Disk

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