Hitachi Aogami 2 Knife Steel
Composition Analysis Graph And Information Details

Aogami 2(Hitachi) - Ref. Kitchen Knife Steel FAQ - Also referred as Ao-Ko II. Hitachi high carbon steel, specifically developed for tools and knives. Ref - Aogami 2 Steel Composition. Very pure alloy - P <= 0.025%, S <= 0.004%. In my experience very good steel, just like its brother Aogami 1. As mentioned above, it's slightly tougher compromising wear resistance a bit. Although, at those levels of hardness 63HRC and above, the difference is really hard to tell, at least in home kitchen use. Watanabe makes his Honesuki knives out of Blue 2, one of my favorites, Kumagoro Gyuto is also made out of it. Aritsugu also makes his high end knives from blue 2, I have only very positive experience with his Honkasumi Yanagi and Fugubiki, both blue 2, 65HRC+. Ref - Aogami 1, Aogami 2 And Aogami Super steel comparison chart.

Known Aliases:
Hitachi - Aoniko, Hitachi - Blue 2, Hitachi - Aoko 2