As long as you all are talking about it at what temp are you tempering at?
Is there a cheat sheet that anyone uses for temps and times for different types of steel and hardnesses or is it just have to experement for yourself??
It is more than just "proper" to do two or more tempers. The first temper, along with the stress relief function, forms super super small carbides called Hagg and Eta carbides. The second temper converts any RA over to carbides and ferrite. The third temper (only when using the upper tempering temperatures) metastable carbides are replaced with stable cementite. Two tempers are needed. Three, not so much.