CPM-S30V – Made by US based Crucible, CPM S30V (often simply referred to as S30V) steel has excellent edge retention and resists rust effortlessly. It was designed in the US and is typically used for the high-end premium pocket knives and expensive kitchen cutlery. The introduction of vanadium carbides brings extreme hardness into the steel alloy matrix. Dollar for dollar, this is generally regarded as one of the finest knife blade steels with the optimal balance of edge retention, hardness and toughness. Note S30V now has a slightly better looking brother in S35VN which is distinctly similar but easier for manufacturers to work with thanks to niobium. Still, S30V is pretty common these days and one of our favorites.