one of the things you can try is to heat (whatever method) a block of steel
to red hot, and get some low heat (say 200degF) into the polished iron.
lay the iron on the block so the sharp part of the iron you want tempered
is off the edge of the block by a couple inches.  the tempering heat will
flow into and down the iron (hotter towards the block), and when it gets to
the color you want at the edge, quench.

bill
felton, ca

On Thu, Jun 13, 2019 at 6:19 PM Bill Webber via OldTools <
oldtools@s...> wrote: