What is the difference between T10 clay-tempered and 1060 carbon steel in these katana?

 Updated Mar 2026

T10 is a tool steel alloyed with a small percentage of tungsten, which refines grain structure and improves edge retention compared to plain high-carbon grades. When clay-tempered, T10 develops a differential hardness between edge and spine, and the resulting hamon — the visible temper line — is considered a hallmark of quality craftsmanship in the collector community. The blue or white hamon finish visible on some pieces here is a direct product of that process. 1060 carbon steel, by contrast, is through-hardened to a consistent Rockwell hardness across the blade, making it highly durable and an excellent choice for collectors who want a reliable full-tang display piece without the premium cost of differential tempering.

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