Description
Hitachi Aogami #2 /Blue Paper Steel core with San Mai construction , stainless cladding and a nickel layer between the core and the stainless made by Takefu Special Steels.
Chemical composition
Carbon 1.05 -1.15
Silicon 0.10 – 0.20
Manganese 0.20 – 0.30
Chromium 0.20 – 0.50
Tungsten 1.00 – 1.50
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 180- 220 Air-cooling
Delivery hardness ( HB ) 229 or under
Hardening hardness ( HRC ) 60 over
