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There have been three Vanax steels: Vanax 35, Vanax 75 and Vanax. Uddeholm discontinued Vanax 35 & 75 and released the new Vanax.
The new Vanax has better edge holding and is tougher than the previous versions. In the data sheet, the newest Vanax is described as being tougher than Elmax which is the toughest PM cutlery grade stainless steel.
Vanax is the most high tech steel available for knives. It is a third generation powder metallurgy nitrogen stainless steel. The steel has very little carbon. Nitrogen is used in place of the carbon to make the steel hard. The result is a steel with extreme corrosion resistance, excellent edge holding and is easily resharpened.