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longest heat treat


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26 inches in propane.  54" in charcoal.  It's all in the stroking it through the hot spot.  Randal Graham used to do 28" katanas in a vertical forge with a 4" hot spot.  It works fine if you have the patience.  Hardening is the easy part with long blades, it's tempering that gets hairy.

I now have a 60" heat treat forge that is technically a single burner (1" T-rex venturi), I just haven't fired it up yet.   

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