Check it out again and cleared that up. Although in the Timken data sheet, it says A2 would have a high toughness at lower 50's. Has anyone tried this? Would differentially hardened A2 be better than normally hardened ones?
Btw, this is the url for the Timken data sheets, they also have documents there about selection of tool steels and heat treating in general, could be useful for people starting out in knifemaking.
http://www.timken.com/products/speci...eneraltech.asp