Toughness envelope definition of pulsed gas metal arc welds in HY80 steel


  1. Begg, D.S.
  2. Matthews, J.R.
Corporate Authors
Fleet Technology Ltd, Kanata ONT (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Over the past decade, Defence Research Establishment Atlantic, has sponsored several projects related to "All Position Gas Metal Arc Welding" as part of their mandate to develop expertise in submarine materials and maintenance technology. These efforts have led to the identification of pulsed GMAW with C5, C10, or T.I.M.E. gas combinations as the perferred ones from the perspective of superior weld zone mechanical properties in HY steels. Previous work was successful in ranking new digital pulsed gas metal arc welding systems for optimal introduction in submarine refit followed by the development of a low heat input benchmark welding procedure for welding HY80 steel in the vertical-up position, using Lincoln's LA100 (ER100S-1) solid wire with T.I.M.E. gas (26.5%He, 8% CO2, 0.5%O2, Ar Bal). Although the benchmark is considered a practical procedure for the purposes of submarine repair and modification, it would be advantageous from the point of view of productivity to increase the heat input while maintaining the toughness requirements. Five welded panels, were produced with ER100S-1 solid wire and T.I.M.E. gas, and radiographed +/- 20 degrees to normal to verify weld soundness. The heat input used to produce each welded panel spanned the practical range for all position welding with the objective of identifying a level at which the weld metal toughness drops off below the required value. TRUNCATED
Pulsed gas metal arc welding (GMAW)
Report Number
DREA-SR-2001-094-SES-VII-PAP-36 — Special Report
Date of publication
01 Oct 2001
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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