I've heard a number of experienced welders say that a TIG welded joint requires post heat treatment and recommend an OA torch to bring the joint up to a dull red and hold it for less than a minute and then slowly allow the weld to cool. On the other hand, the guy that wrote the book Performance Welding claims that he oversaw the TIG welding of 1800 Aerostar engine mounts that had no pre or post weld heat treament and had experienced no cracked joints. I'm sure that there are opinions and anecdotal evidence to support both sides of this issue. Are there any Pros out there that can comment on this?
Stu Fields