What carbon steel grade is used, and does it affect display quality?
Updated Mar 2026
Most replicas in this collection are constructed from 1045 high-carbon steel, with select models - such as the Yama Enma - using 1060 carbon steel. The number refers to carbon content by weight: 1045 contains 0.45% carbon and 1060 contains 0.60%. For display purposes, higher carbon content produces a blade with a slightly more pronounced grain pattern and a darker, more visually complex surface finish - qualities that photograph well and reward close inspection. Both grades hold their geometry and finish far better than stainless steel over time, provided the blade receives basic maintenance. Neither grade is prone to the brittleness sometimes associated with higher-carbon production steel, making them well-suited for long-term static display without concern for structural degradation under normal indoor conditions.