How does 1045 steel compare to 1095 in these replicas?

 Updated Mar 2026

The numbers refer to carbon content by weight: 1045 contains approximately 0.45% carbon, while 1095 contains around 0.95%. In practical terms for a display collectible, 1045 is a bit more forgiving - it's less prone to surface oxidation and easier to maintain with basic care. The 1095 steel used in the NCO Shin Gunto replica is harder and holds a finer polished edge, but it also demands more attentive upkeep, particularly in humid environments. The 1090 used in the Michonne-inspired katana sits between the two, offering a noticeably refined hamon line after polishing. If you're building a collection you'll handle often, 1045 pieces are lower-maintenance. If edge definition and blade character matter more, 1095 and 1090 options reward closer attention.

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