Originally Posted by
Scooper
Waterford used silver brazed stainless lugged construction on my 953 frame, with brazing temperatures at 1200 -1300° F (not sure where 1760° F came from unless it’s the melting point of silver which in this case is irrelevant since the silver brazing filler material consists of silver, copper, zinc, and tin, and melts at 1184° - 1256° F).
At these brazing temperatures the strength of the 953 pre-aged tubes in the butted HAZ is not affected, or at worst minimally affected, and since there is no post-heat treatment required re-tempering the whole frame and the risk of frame warping isn’t an issue.
I always thought "silver solder" used for brazing was an alloy or eutectic with a lower melt point than silver. Then, I read something about using pure silver, not a silver solder. This was the cause of my concern. Even so, some alloys will (partially) anneal at teh temperaturs you quote. It is really essential to know which alloy one is working with and what its properties are. We agree that "stainless steel" is too broad a term.
Welding is a totally different mprocess, altogether.