Silver steel 3
Silver Steel 3 (developed by Hitachi Metals Ltd.) is fine-grained stainless steel with high carbon content and has a "special cut," this steel is easier to sharpen, and no special abrasives are required. These blades have a very high hardness due to their high carbon content. Sliver No.3 can attain the same level of edge sharpness and edge retention as some High Carbon steels. It is otherwise known as ginsan.