What steel grades are used in original Japanese katana from this collection?
Updated Feb 2026
Original Japanese katana in this collection are available across the primary high-carbon steel grades of authentic Japanese sword construction. T10 carbon steel is the most traditionally grounded grade, used with clay tempering to create the differential hardening process that produces a visible hamon along the blade length. On a T10 original Japanese katana, the hamon is the primary visual marker of authentic construction - its presence confirms that the blade went through the clay tempering and quenching process that creates the characteristic hard-edge, tough-spine differential. Damascus steel original Japanese katana feature fold-forged layered patterning - the individual fold pattern on each blade is a result of the forge-welding process and is unique to each piece. 1060 carbon steel provides excellent hardness and surface quality in classic configurations. 1065 carbon steel offers similar performance with distinctive surface character. 1045 carbon steel represents the foundational high-carbon grade in the most widely available configurations.