Blue Steel #2 (Aogami #2) is a high-carbon tool steel alloyed with tungsten and chromium for wear resistance and toughness, with a touch of vanadium for fine grain. In Santoku form, blades span 5 to 7 inches with a thin double bevel, flat belly, and low tip. Heat-treated to high hardness, it holds a keen edge yet sharpens predictably on water stones. Because it is reactive, a patina will form; kurouchi or stainless cladding reduces exposure. Care for Blue Steel #2 by hand washing only, drying at once, wiping a thin coat of camellia or mineral oil, avoiding soaking or dishwashers, and storing fully dry.
To see how these ideas show up in real knives, explore our Santoku collection. You can check blade length, edge style, and handle fit side by side, then choose the balance, look, and maintenance level that suits you.
