Talk:Tamahagane

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Tamahagane sand is a treasure indeed. Some of the finest swords in the world are made from it. Some modern replacements are 1090,1080, and 1060 spring steel grades. The numbers are measurements of carbon content in the steel. Most blades have a differential tempering leaving the blade a HRC of 60 on the blade and of 40 towards the back edge. This allows for a razor sharp edge and a softer body for shock absorption.