Re: Sand?


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Posted by David Sherman on Wednesday, December 06, 2006 at 4:14PM :

In Reply to: Sand? posted by Ken C. on Wednesday, December 06, 2006 at 3:39PM :

I've done it to slowly cool cast iron that I've brazed. The key with brazing cast is to heat the whole piece red hot, braze it, and then let it cool as slowly and evenly as possible. I've heard of using vermiculite for even slower cooling. Sometimes I've just wrapped the thing up in fiberglass insulation to cool if sand wasn't handy but insulation was. Whatever you use must be perfectly dry.



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