What steel is used in these One Piece sword replicas?
Updated Mar 2026
All swords in this collection are crafted from 1045 carbon steel, a high-carbon alloy containing approximately 0.45% carbon content. This grade is a popular choice for display and collectible blades because it offers a convincing weight and density that mirrors functional Japanese swords without requiring the intensive heat-treatment processes used in higher-grade steels like T10 or tamahagane. For a display piece, 1045 carbon steel delivers the visual and tactile authenticity collectors expect - a solid, full-tang construction with real heft - while remaining accessible in price. The steel also takes polish and surface finishing well, which is why these replicas can achieve the dark aesthetic of Shusui or the clean mirror-finish look of Wado Ichimonji.