Polished temper line
A visible edge-side line created or emphasized through finishing rather than differential hardening.
Care: Avoid aggressive polishing that could alter the finish.
Katana Steel Guide
Steel guide
A closer look at blade materials and finishes.
Explore the terms used in our collection, from layered patterns to polished finishes. Materials and processes vary by model; use each product's specifications to compare the pieces you like.
Core catalog constructions and finishes
| Label | About the material or finish | Care | Browse |
|---|---|---|---|
| High-carbon steel | A catalog label for selected carbon-steel blades. The exact grade and heat treatment must come from the individual listing. | Wipe exposed carbon-steel surfaces after handling, keep them dry and apply a light protective oil. | High Carbon Steel Katana |
| Blackened blade finish | A dark blade surface treatment used on selected models. | Keep the surface dry and avoid abrasive polishing unless the product instructions specifically allow it. | Blackened Finish Katana |
| Folded patterned steel | Workshop-declared forge-welded and drawn material with visible layered grain. | Keep the blade dry and lightly oiled; do not use abrasive polish on decorative finishes. | Patterned Steel Katana |
| T10 clay-tempered steel | Selected listings declare T10 steel and clay-assisted differential hardening. | Keep carbon-steel surfaces dry and lightly oiled. | Clay-Tempered Katana |
Understanding the details
Differential hardening and genuine hamon
A workshop-declared process in which the edge and spine cool differently during quenching, producing a visible hardening boundary.
Care: Keep the blade dry and lightly oiled.
Kobuse jigane
A workshop-declared composite blade-construction term used on selected Collector listings.
Care: Follow the individual listing and standard carbon-steel care.
Refined jigane
A workshop description of blade material and grain rather than a standardized alloy number.
Care: Follow the listing and keep the blade dry and protected.
5160 spring steel
A steel-grade label published on selected models.
Care: Keep the blade dry and lightly oiled. Use the model listing for finish-specific care.
1060 high-carbon steel
A steel-grade label published on selected models.
Care: Keep the blade dry and lightly oiled.
1065 high-carbon steel
A steel-grade label published on selected models.
Care: Keep the blade dry and lightly oiled.
Full-tang construction
A one-piece blade and tang extending into the handle, secured as declared for the model.
Care: Do not disassemble unless the product instructions and your experience support it.
Keep exploring
Use the Katana Glossary for names of parts and the care guide for storage and maintenance. For choosing a piece, customization, payment and delivery, visit the Buyer FAQ.