~Nemo me impune lacessit~
I wondered that too but I think it's below the trouble point - I think you have to get up over 1,000 degrees before you have trouble?
Pretty sure.
~Nemo me impune lacessit~
If you held at 650F for more than a minute or two, you'd be drawing down the hardness. Dip and swirl only as long as you must to achieve the correct color.
Ah... thanks. Larry should have mentioned that! Those are all hardened parts...
~Nemo me impune lacessit~
Well when the guy in the video said the metal was getting a "straw color" it made me think of what steel does when you heat it a second time after hardening to "draw it out" to the right hardness.
I have a nice old pistol that is almost in the white from age and wear and that nitre blue looks pretty nice... but I don't want to ruin a heat treated part...
Gentlemen may prefer Blondes, but Real Men prefer Redheads!
this is what i was thinking of, most likely because of the use of nitric acid.
http://www.assra.com/cgi-bin/yabb/Ya...m=1282132883/0
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