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ZDP-189 - Kitchen Knife Steel FAQ - Latest super duper PM steel. extremely high carbon and chromium content. C - 3% and Cr - 20%. Very high hardness, several makers harden it to 65 or even 67HRC. As you can guess very expensive too. ZDP-189 steel and Cowry-X steel are
very similar, in that those two have the same C and CR content. Although, in 2009, Henckels representative in Tokyo did confirm MC66 being ZDP-189. Later, in 2010 I was contacted by Henckels Japan head of operations and I got first hand confirmation from the source that MC66 is ZDP-189. Exact element makeup unknown, whatever I have in the Knife Steel Chart is not confirmed by Hitachi. Unlike Cowry-X, ZDP-189 contains Molybdenum, Tungsten and Vanadium. Overall, very good edge holding and toughness. Hard to sharpen compared to other steels, nothing impossible, really.
MC66 - Rebrand name for the Hitachi ZDP-189 used by Henckel in their Miyabi knives.
MC66 - Rebrand name for the Hitachi ZDP-189 used by Henckel in their Miyabi knives.
Alternate designations: ZDP-189(Hitachi), MC66(Hitachi).