What is the difference between 1045 and 1065 carbon steel blades?
Updated Mar 2026
Both 1045 and 1065 are high-carbon steels commonly used in hand-forged collectible katanas, but they differ in carbon content and the resulting finish quality. 1045 carbon steel contains approximately 0.45% carbon, making it a reliable, cost-accessible choice with good density and a solid mirror or satin polish. 1065 carbon steel, at roughly 0.65% carbon, has a finer grain structure that allows for a more refined polish, meaning the blade reflects light with greater clarity and consistency. For display-focused collectors who prioritize visual impact, 1065 blades tend to offer a noticeably more striking appearance, particularly under directional lighting. Neither is better in absolute terms - the right choice depends on your display priorities and budget.