I've been thinking about trying some S5 for cold cuts. Does this forge in the orange - yellow range? What color for the edge temper?

Some suppliers will have all of that information on the spec sheet for the alloy. 

"Heating for forging must be done slowly and uniformly. Heat through at 1800 – 1950°F, but avoid prolonged soaking, and reheat as often as necessary, stopping work when the temperature drops below 1600°F. After forging cool slowly in lime, mica, dry ashes or furnace. S-5 should always be annealed after forging."

http://ess.elwd.com/product/s5/

they also have a bunch of info on heat treating

Thanks. I book marked the web site.

"Mica" is vermiculite by the way; any of the list is ok you don't need a mix...