Generally you never quench a weld but on certain types of stainless steel if you quench the hot weld, it is a good thing as it anneals it.
If you do a 6010 full penetration groove weld (double bevel) and break it at 650 deg. it will show the grain structure in the weld. You need a tempilstick to check the temperature while the weld cools a little bit to 650 deg's. Lincoln rods will usually break in the middle of the weld and Hobart will break on the side of the plate. At least in the 80's when we did it in school. It was kind of neat to see. Make sure you have some good pliers or something to handle the hot piece.
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