Musashi - 1060 Carbon Steel - Best Miyamoto Sword Musashi - 1060 Carbon Steel - Clay Tempered Samurai Sword Blade Material: 1060 High Carbon with clay temper process. 55 HRC blade hardness Extremely sharp hand honed edge Check the musashi engraving on seppa (spacer) for authenticity with musashi box. Don't settle with a counterfeit one.