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I'm so jelous. I used to operate ovens like that, but don't have access to them anymore. I have to resort to more primitive methods.

+1 to what mike has said about foil or another oxidisation...

HI Shaggy,

70 HRC is unbelievably hard. this would only be obtainable under very controlled conditions. I'd recommend quenching the blade in oil even if this steel turns out to be a water quench...

Hi Shaggy,

The best method to establish the temperature to reharden at is by using a magnet. The steel will become non magnetic once the bottom end of the critical temperature zone is reached. If...