Crucible’s CPM-S90V steel approaches the very pinnacle of wear resistance and edge retention.   As you’d expect the carbon content is very high but the secret here is the extreme quantities of vanadium, almost three times that found in Elmax or S30V!!  Yes it’s expensive, and yes it can be more difficult to sharpen but outside its less common cousin CPM-S110V nothing holds an edge or withstands abrasion quite like CPM S90V.  One of the hottest CPM S90V blade’s right now is the Benchmade Altitude with exceptional performance.