James B - My error. Thanks for the real info. and tip on saving an
air cooled piece.
I’ve only ever used 18kt. The first time we cast a ring in 18kt rose
it came out looking great. When we put it on a mandrel and hit it
with a hammer to bump it up half a size it just shattered. We re
melted and quenched and it was still bad. So there was no saving it.
Pretty effective and harsh lesson.
Since then I’ve religiously quenched and haven’t had the opportunity
to try to save an air cooled piece. I sure hope I never have to do