What carbon steel grades are available in the ninjato collection?
Updated Feb 2026
The carbon steel ninjato collection includes several steel grades that cover a wide range of quality levels and price points. The most accessible entry point is 1045 carbon steel, with approximately 0.45% carbon content - a tough and workable grade that produces reliable ninjato collectibles at an accessible price. Manganese Steel is featured across many pieces and is valued for its exceptional surface hardness and deep finish quality. 1090 carbon steel is a higher-carbon grade that sits above 1045 in terms of achievable hardness and edge retention. T10 carbon steel is the premium option in the collection: its tightly controlled grain structure and high-carbon composition allow for differential heat treatment that produces a visible hamon temper line - the wave-patterned edge boundary that forms during quenching and is one of the most visually prized details in Japanese sword collecting. All grades in the collection are used with full-tang construction, with the steel core running from blade tip through the complete handle secured by a mekugi pin.