How does T10 carbon steel differ from pattern-welded steel in a tanto?

 Updated Mar 2026

T10 is a high-carbon tool steel with a small amount of tungsten, which contributes to edge retention and allows the blade to hold a well-defined hamon when clay tempered. The surface of a T10 tanto is typically polished to highlight the temper line rather than the steel's internal grain. Pattern-welded construction, by contrast, combines multiple steel types through forge-welding and repeated working, producing the layered surface grain that flows visually across the blade. A T10 tanto emphasizes the drama of the hamon; a pattern-welded tanto emphasizes the complexity of the steel itself. Both are legitimate collecting focuses with different visual priorities.

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