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268671 "Adam R. Maxwell via OldTools" <oldtools@s...> 2019‑06‑13 Re: Need some help with heat treating O1 steel
> On Jun 12, 2019, at 18:25 , Bill Webber via OldTools  wrote:
> 
> To determine the right temperature, I've heard of going by color, I've heard
of using a magnet (like I'm gonna stick a magnet to a chunk of metal at a 1000
degrees) Larry Williams talks about 'watching the metal sweat'.  So, can someone
point me to something that works?

I did it the way Larry says, and looking for the little sweat beads seemed to
work fine. I also used peanut oil, because of the high flashpoint or whatever;
that was also fine. There's enough variability in hardness and temper of my
vintage irons that I basically expect some inconsistency, and I've had no
trouble using my hollows and rounds. YMMV, and good luck!

Adam

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