Thank you. This was my first heat treat of a blade this long and I am still learning but I heated in a gas forge to about 1600 F and quenched in 150 F oil, and tempered @ 325 F. Not posting this as a recipe, only as a starting point.
My first build is a stock removal 5160 blade. Blade length 22" OAL 32".
A nerve racking quench and temper turned out a decent blade that flexes nicely and is hard. I wanted to get a feel for it before I try forging one.