青紙スーパー

Aogami Super

Super Blue Steel

The highest-carbon variant among Aogami steels. Includes vanadium and molybdenum for extreme edge retention and hardness. Revered and feared in equal measure — its edge outlasts almost everything, but requires a master's touch to sharpen properly. The pinnacle of the Hitachi carbon steel family.

Performance Characteristics

Sharpness9/10

Edge Retention10/10

Ease of Sharpening5/10

Rust Resistance4/10

Chemical Composition

carbon1.40–1.50%chromium0.30–0.50%tungsten2.00–2.50%vanadium0.30–0.50%molybdenum0.30–0.52%

Technical Data

Hardness63–67 HRC HRC

Heat TreatmentDifficult — requires precise temperature control

Primary UsePremium plane blades, finest chisels

ManufacturerHitachi Metals (now Proterial)