T10 Sword

T10 is a tungsten-alloy carbon steel with approximately 1% carbon content, plus added tungsten and silicon. These alloying elements give T10 exceptional hardness and edge retention while maintaining enough flexibility to resist breakage. T10 is particularly popular for Japanese swords because it responds well to traditional clay tempering — the process that creates the real hamon line (visible temper pattern) along the blade. This combination of performance properties and visual character makes T10 one of the most collected sword steels.

This collection includes T10 steel swords across all major Japanese blade formats: katana (full-length samurai sword), wakizashi (medium-length companion sword), tanto (short blade), ninjato (straight-blade ninja sword), and tachi (cavalry sword). All share the same T10 carbon steel composition and hand-forging process. The variety allows collectors to build matched T10 sets — for example, a katana and wakizashi daisho pair — or select specific formats for their display preferences.

T10 has higher hardness than 1045 and comparable hardness to 1095, but with better toughness due to its tungsten content. In practical terms, T10 holds an edge longer than 1045 or 1060 steel, and resists chipping better than 1095. T10 also responds exceptionally well to clay tempering, producing clear and dramatic real hamon lines. The main trade-off is price — T10 swords are typically more expensive than 1045 or 1060 options, reflecting the premium steel and more complex forging process required.

The hamon is the visible wavy line running along the blade, created through traditional clay tempering (tsuchioki). During forging, a clay mixture is applied in varying thicknesses along the blade — thicker on the spine, thinner along the edge. When the blade is heated and quenched, the differential cooling creates two hardness zones. The boundary between these zones is the hamon line. On T10 steel, this hamon is real and permanent — it is a physical result of the heat treatment process, not an etched or painted decoration. Each T10 blade's hamon pattern is unique.