ZA-18 steel was co-developed by Osaka Clad Co., Ltd and Aichi Steel Corp as a high-end stainless steel designed to rival or surpass VG-10. While the chemical composition is similar, ZA-18 contains higher levels of carbon (1.20%), chromium (18.0%), molybdenum (1.5%), and cobalt (1.8%), giving it superior hardness, edge retention, and corrosion resistance.
Thanks to its enhanced composition, ZA-18 offers higher hardness (up to 62–63 HRC), better edge retention, and improved corrosion resistance compared to VG-10. It sharpens well and delivers long-lasting performance, making it ideal for premium Japanese kitchen knives.
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