Our Zenitsu Sword replicas are forged from 1045 carbon steel, a medium-carbon alloy widely used in traditionally styled Japanese blades. This grade offers a solid balance between hardness and flexibility — it holds an edge profile well and resists lateral stress without becoming brittle. Compared to stainless steel display pieces that are often cast or stamped, 1045 carbon steel is actually heated, hammered, and tempered through a forging process, which gives the finished blade a realistic weight of roughly 900 to 1,100 grams. The steel also responds naturally to oil maintenance, developing a subtle patina over time that many collectors appreciate as part of the piece's character.