Ecnerwal wrote:

amdinc wrote:

you let it cool and if possible do a hardness test on it.

Be very careful _where_ you do that, of you do. One of the case studies
that was mentioned in on of my materials science courses was a brake or
wheel part which was hardness tested to verify heat-treat - they started
failing, and the failures were traced back to cracks starting in the
divot where the hardness tester had been used.

--
Cats, Coffee, Chocolate...vices to live by


you never do a hardness test in a high stress area of a part..if fact
the best way is to do a sample piece abd test that.

John