Which steel is better for a collectible katana, T10 or 1065?

 Updated Feb 2026

Both are excellent choices, but they differ in composition and visual character. T10 is a tungsten-alloyed tool steel with a high carbon content around 0.9–1.0%, which allows it to develop a particularly vivid and active hamon when clay tempered. The tungsten addition refines the grain and improves edge retention, making T10 a favorite among collectors who value dramatic temper lines. 1065 carbon steel contains roughly 0.65% carbon with no tungsten, producing a slightly softer blade that is easier to polish and maintain. Its hamon tends to be subtler and more uniform. If your priority is a bold, photogenic hamon for display, T10 is the stronger pick. If you prefer a classic, understated look and simpler long-term upkeep, 1065 serves that role beautifully.

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