ZDP-189 vs Aogami #1

A remarkable Hitachi powder-metallurgy stainless steel with an extraordinary 3% carbon content — the highest of any commercial steel. Achieves hardness levels of 67–69 HRC, creating edges of uncanny keenness with stainless properties. Heat treatment demands extreme precision; it is unforgiving and expensive.

High-carbon steel alloyed with chromium and tungsten for enhanced wear resistance and edge retention. Ideal for hard woods and heavy use. Forged by masters who prize its demanding nature, it rewards a skilled sharpener with extraordinary edges that outlast almost any other carbon steel.