Extreme edge retention. Will work and grind like D2 and give the hardness and toughness of CPM S30V. A cryo treatment may be added between tempers. Aim hardness is 58/61. CPM S35VN is a registered trademark of Crucible Industries LLC. Typical chemistry C 1.40, Mn .40, Si .40, CR 14.00, Va 3.00, Mo 2.00, NB .50.