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Old 04-19-2011, 09:13 AM
oldred oldred is offline
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Quote:
Originally Posted by evolvo
You got me thinking so I googled it

http://www.ehow.com/how_4616717_inst...hardening.html

lots to learn!


That suggests tempering at 325 deg, not likely to accomplish much at that low of a temperature and for a "one size fits all" tempering temperature 400 deg to 425 deg in an oven for a hour would be better. If the type of steel is not known, or close to it, then using ball-park figures for the heat to either harden or temper is going to a hit-or-miss proposition at best.
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