What makes 1065 carbon steel a good choice for a collectible katana?
Updated Mar 2026
1065 carbon steel sits at roughly 0.65% carbon content, placing it in the medium-to-high carbon range. For collectible katana, this composition matters because it produces a dense, consistent grain structure during hand-forging, resulting in a blade with well-defined geometry and a surface that polishes to a refined finish. Unlike lower-carbon alloys, 1065 responds well to the differential tempering process used in traditional blade craft, and unlike stainless steel, it develops an authentic patina over time. Collectors who value material authenticity over maintenance convenience consistently prefer carbon steel blades precisely because they age and respond to their environment — a quality that stainless alternatives simply cannot replicate.