Description
Hitachi Aogami Super / Super Blue Paper Steel
Aogami Super Steel is an enhanced version of Aogami steel with added elements like vanadium and a slightly higher carbon content. It achieves the highest hardness among the three types, typically around 64-65 HRC.
Aogami Super Steel offers the best edge retention and wear resistance. It can maintain a razor-sharp edge for an extended period, but it also requires diligent care to avoid rusting and corrosion.
Chemical composition
Carbon 1.40 -1.50
Silicon 0.10 – 0.20
Manganese 0.20 – 0.30
Chromium 0.30 – 0.50
Tungsten 2.00 – 2.50
Vanadium 0.30 – 0.50
others P:<=0.025 and S:<=0.004
Standard Heat Treatment temperature ( centigrade )
Annealing 750- 780 Slow cooling
Quenching 780- 830 Water cooling (Oil cooling)
Tempering 160- 230 Air-cooling
Delivery hardness ( HB ) 229 or under
Hardening hardness ( HRC ) over 60
