Abstract
Abstract Temper bead (TB) welding is routinely used as an alternative to post weld heat treatment (PWHT) when performing weld repairs on low alloy steels in the nuclear power industry. Historically, TB welding procedures have been qualified by Charpy V-notch (CVN) testing to demonstrate acceptable impact properties in the weld heat affected zone (HAZ). Part 1 of this work investigated a hardness drop criterion to demonstrate proper HAZ tempering using a vintage heat of SA-508 forged material (see PVP2019-93950). Optimization of hardness test parameters was also a major piece of the Part 1 scope of work. Part 2 of this work adds a more modern heat of SA-508 material and two heats of A-387 F22 material to the study. The overarching goal of this work is to support an alternative hardness test protocol for qualification of temper bead welding (see PVP2015-45663).
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