The ZA-18 was specially developed by Osaka Clad Co., Ltd with Aichi Steel Corp to compete or even outperform VG10. It has similar chemical composition to the VG10, but contains higher Carbon (1.20 vs. 1.05), Chromium (18.0 vs. 15.5), Molybdenum (1.5- vs. 1.20) and Cobalt (1.80 vs. 1.50) for added hardness, durability and corrosion resistance.