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Carbon Steel Carbon Steel

Carbon steel is reactive — it will rust quickly if not properly cared for. Always wash immediately after use, dry thoroughly, and apply a thin coat of food-safe oil (camellia, mineral) before storage. Over time it develops a patina that offers some natural protection and, for many users, becomes part of the knife's character. Rewarding to use, but not recommended if you want a "wash and forget" knife. Takefu Special Steel, Japan 🇯🇵

V-Toku 2

Hardness ? Rockwell C Hardness (HRC) measures how resistant a steel is to permanent deformation. For kitchen knives:

55–58 HRC — Soft. Easy to sharpen and forgiving of rough use, but dulls faster. Typical of most German knives.
59–61 HRC — Balanced. Good edge retention with manageable sharpening. Common in mid-range Japanese knives.
62–64 HRC — Hard. Excellent edge retention, holds a very fine edge. Requires more care and a fine stone to sharpen.
65+ HRC — Very hard. Exceptional edge longevity but more brittle — more prone to chipping if used roughly.

Higher is not always better — it depends on how you use and maintain your knife.
62–64 HRC
555759616365+
V-Toku 2(V特２号, V-Special 2) is Takefu Special Steel's take on the classic Hitachi Blue 2 Steel. As a alloy carbon steel, its chemical composition is very close to Blue 2 with some addition of Vanadium, combined with the higher claimed purity by Takefu, V-Toku 2 should have a slight improved wear resistance than the Blue 2.

V-Toku 2 have excellent hardenability, which allows it to be brought up to HRC64, many makers will take advantage of the hardness to produce razor-thin blade that will slice through food extremely well. As Takefu also produce laminated billets with copper or bronze layers, V-Toku can also be seen on knives from European and American makers, which allows many chefs to benefit from the excellent cutting experience of a carbon steel knife.
Composition

V-Toku 2 Element Composition

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    V-Toku 2
    —
    1.25% 0.9% 0.6% 0.3% 0
    C Carbon 1.05%
    Primary hardening element. Raises hardness and wear resistance — but too much increases brittleness and corrosion susceptibility. As a reference: German 1.4112 (~0.5%) sits at the low end; VG-10 (~1.0%) is a common mid-range; SG2 (1.25–1.45%) and ZDP-189 (~3.0%) represent high and extreme ends respectively.
    C
    1.05%
    Cr Chromium 0.35%
    Raises corrosion resistance; 13%+ qualifies steel as stainless. Also improves hardenability and wear resistance. In kitchen use, higher chromium levels contribute to a slight drag or sticking sensation when cutting — a trade-off for the rust resistance it provides.
    Cr
    0.35%
    V Vanadium 0.2%
    Forms extremely hard carbides for superior edge retention. Also refines grain structure, improving toughness.
    V
    0.2%
    W Tungsten 1.25%
    Forms hard carbides for wear resistance and edge retention. Gives the steel hardness even at elevated temperatures.
    W
    1.25%
    Mn Manganese 0.5%
    Aids hardenability and strength. Acts as a deoxidiser during smelting. Excess can reduce toughness.
    Mn
    0.5%
    Si Silicon 0.35%
    Strengthens the steel matrix and acts as a deoxidiser. Improves hardness and resistance to oxidation.
    Si
    0.35%
    P Phosphorus 0.03%
    Impurity from the smelting process. Even small amounts cause brittleness — steelmakers keep this as low as possible.
    P
    0.03%
    S Sulfur 0.03%
    Impurity that reduces toughness and promotes brittleness. Intentionally added only in free-machining steels.
    S
    0.03%
    Ni Nickel 0.25%
    Improves toughness and ductility without sacrificing hardness. Adds a small boost to corrosion resistance.
    Ni
    0.25%
    C — Carbon Cr — Chromium V — Vanadium W — Tungsten Mn — Manganese Si — Silicon P — Phosphorus S — Sulfur Ni — Nickel
    Hardness 62–64 HRC
    555759616365+
    Steel
    V-Toku 2
    Category
    Carbon
    Manufacturer
    Takefu Special Steel, Japan 🇯🇵
    Hardness
    62–64 HRC

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