In the April 2007 issue of Blade there is an article on heat treating and they mention the recipe for S30v on page 110. That is pretty much the procedure that I follow...

Items are wrapped in stainless foil, brought up to austentizing temperature at 1950 F. and held for 30 minutes in my Paragon Oven with computer controller. Then items are pressure quenched in between aluminum plates for rapid reduction of heat and the subsequent hardening.

I then immediately temper two times at 675 F. This is a little toward the high side but is what the Crucible metallurgist recommended for CPM S30v. I go to 950 F. three times for CPM 3V knives and prybars. I have recently had the hardness tested for several pieces. The Rockwell Hardness measures 58-59 for CPM S30v and CPM 154.

For larger batches I sometimes send out to a local heat treater who has an oven with nitrogen atmosphere. Rockwell testing of those pieces shows identical hardness with the added benefit of no scale and a lot less work on my end. Costs me a bunch more but it enables me to get more pieces through and saves a lot of time.