What makes 1095 steel different from 1060 or 1045 in a katana?
Updated Feb 2026
The number in each steel grade refers to its carbon content — 1045 has roughly 0.45% carbon, 1060 has 0.60%, and 1095 has approximately 0.95%. Higher carbon content produces a harder, more refined grain structure in the finished blade. For collectors, this means 1095 katanas hold a sharper edge geometry for longer, display a more vivid hamon after clay tempering, and generally exhibit a finer surface quality under close inspection. The trade-off is that higher carbon steel requires more careful storage to prevent oxidation, but for display and collection purposes, that is easily managed with basic maintenance. 1045 and 1060 are commonly used in entry-level pieces; 1095 and its refined variant T10 are the grades serious collectors seek out.