Austenitize: Heat to 1,560°-1,635° and hold for 5 minutes. Quench in oil.
Temper: Temper twice for two hours each time. Use the chart below to select the tempering temperature.
From Alphaknife
From Pops
8670
Hardening
Austenizing temperature - 1,550
Hold/Soak Time - 3-10 minutes
Expected Rc...