Dealing with cast iron / stress?

[Highpower]

(01-26-2013, 10:21 PM)Sunset Machine Wrote: But back to aging cast iron - wasn't it the Germans who discovered that several freeze-thaw cycles accomplished the same thing but faster than the outdoor aging process back in WWII? Pop it in and out of your freezer a few times.

I don't know about cast iron but apparently that works pretty well with stainless steel. I have a couple of Krieger match grade rifle barrels that went through cryogenic treatment twice. (Before and after machining.) There is no change in the point of impact going from a cold barrel to a hot one, so I'm a believer...

I don't think my home freezer is going to cut the mustard though.