The work described in this paper was undertaken to determine the effects of stress relieving on the mechanical properties of weldments up to 115 mm thick in normalized SA-350 LF2 material. Four forged parts, each from a different heat of steel, were obtained, normalized, and then given one or more stress relieving operations. Tensile tests and Charpy V-notch impact tests were taken from each forging for each heat treatment condition. It was concluded that neither the yield strength, tensile strength, elongation, nor reduction in area was detrimentally affected by the stress relieving operation. One stress relieving operation reduced the Charpy V-notch toughness up to 66%. A second stress relieving operation performed at the same or at a lower temperature did not further reduce the Charpy V-notch toughness.
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