Japanese Steel Types and Characteristic!

SHIROGAMI 1 (white steel)
Hitachi Co., around 1.3% carbon, 0.25% manganese, HRC 61-64.
This is pure carbon steel, fine grained and extremely hard, used by traditional foundries and for forging Honyaki blades.

The same components as 1, but in lower quantities.

AOGAMI 1 (blue steel)
Hitachi Co., around 1.3% carbon, shirogami base + 1.5% tungsten, 0.4% chromium, HRC 61-64.
The addition of carbides makes it stronger than white steel. It is also used for the best honyaki blades.

The same components as 1, but in lower quantities.

Hitachi Co., around 1.4% carbon, aogami base + 0.4% molybdenum, 0.4% vanadium, HRC 61-65.
This high quality steel is even harder and stronger when it is treated well. Able to take very sharp, resistant edges, it cuts beautifully.

This is relatively soft, high-quality steel that is forged in a blast furnace for long blades, in particular, swords.


Hitachi Co., around 1.05% carbon, 13% chrome, 0.8% manganese, HRC 59-62.
This is the stainless steel traditionally used most often. It is very pure, fine grained and has a good structure for high performance.

Takefu Co., around 1% carbon, 15% chromium, 1% molybdenum, 0.2% vanadium, 1.4% cobalt, 0.5% manganese, HRC 58-62.
Cutting-edge stainless steel, widely used today for its properties. It can be forged at a higher temperature thanks to the cobalt. It is hard and resistant to wear, strain and oxidation. It will keep a clean, sharpened edge longer. It is also very often used for suminagashi.

VG1 (RC60)
Takefu Co., around 0.95% carbon, 14% chromium and 0.30% molybdenum.
An alloy with a high carbon content that is very resistant owing to the addition of molybdenum.

Aichi Co., around 1.05% carbon, 14% chromium, 0.2% molybdenum, 0.2% vanadium, 0.5% manganese, 0.50% nickel, 1% silicon, HRC 58-61.
Middle-range stainless steel with the addition of Mo/V to give it greater strength than basic stainless steel.


Kobelco Co. steel, around 1.45% carbon, 16% chromium, 3.2% molybdenum, 2% vanadium and 0.5% manganese, HRC 62-65.
Very resistant to oxidation, wear and strain, this high-quality steel provides optimal results and sharpens relatively easily.

Hitachi Co., around 1.6% carbon, 13% chromium, 1% molybdenum, 0.4% vanadium, 0.3% manganese, HRC 62-64.
Steel for tools. Well used, it resists wear very well. SLD is the same base, improved at the level of the grain.

Around 1.5% carbon, 13% chromium, 2.75% molybdenum, 1.5% vanadium, 1.25% tungsten, HRC 62-64.
An alloy with great resistance to wear. Treated correctly, it performs very well for kitchen knives.

SG2 ou SPG2 (MC63)
Takefu Co., around 1.35% carbon, 14.5% chromium, 2.8% molybdenum, 2% vanadium, 0.35% manganese, 0.10% nickel, HRC 61-63.
Practically the same as R-2.

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