ZDP-189 Gyuto Damascus 240mm (9.4") - BLADE

The blade is made from the best powder steel, ZDP-189, so it's rust-resistant, low-maintenance, and keeps a super sharp edge for a very long time. At 240mm (9.4"), this gyuto is the perfect length for all cutting work in the kitchen, be it making steaks or chopping veg, as long as it is accompanied by a trusty petty for all those smaller, in-hand tasks.

This ZDP-189 Gyuto blade is available without a handle, giving you the option to assemble your very own unique custom knife! You can fit your own handle or choose from a large selection of knife handles we have on offer here. If you would like us to fit the chosen handle on the blade, please choose the option handle fitting service.

BLADE SHAPE:
Gyuto is the most versatile and useful blade shape in the modern kitchen. It has a wide profile for easy food transfer and tends to be fairly flat towards the heel, enabling easy and fast chopping on the cutting board. A pointed tip allows piercing and precise, delicate work. A slight curve between the tip and the midsection makes the belly great for rocking the blade back and forth when cutting. It can be used for cutting meat, fish, and vegetables.

STEEL:
This knife was forged out of ZDP-189 steel, which falls into the powder steel category. The ZDP-189 steel has gained a reputation as one of the most technologically advanced steels in Japanese knife making, due to its unique characteristics. The steel contains as much as 3% Carbon (C), which is one of the main elements contributing strength and typically found in amounts of up to only 1% in other types of solid steel, while the Chromium (Cr) content, which prevents corrosion, amounts to nearly 20%. It also features 0.60% Tungsten (W), which considerably increases the abrasion resistance of steel, 1.4% Molybdenum (Mo), which helps to preserve the strength and power of steel under variable temperatures, and 0.10% Vanadium (V), the key element in increasing steel strength. Heat treatment produces steel with a hardness of 65-67 HRC.

Because of its composition, though, it can be hard to treat and forge, so it can only be trusted to the most experienced blacksmiths.

ZDP-189 composition: C 3.00 % | Cr 20.00 % | W 0.60 % | Mo 1.40 % | V 0.10 % | Mn 0.50 % | Si 0.40 %

LAMINATION:
The blade’s core was laminated using the san-mai method to improve its structural integrity and subsequent ability to withstand impacts and prevent chipping. San-mai translates to “three layers” in Japanese, referring to a blade that is composed of a primary, inner layer of harder steel (hagane) and two secondary, outer layers of softer steel (jigane) that protect the prior. → Read more on Blade Construction: Lamination.

GEOMETRY:
It has a double bevel (symmetrical) blade (50/50) with a v-edge grind. The blade has a distal taper - at the tang, the blade is 2.3mm (0.09") thick and narrows towards the tip, where it is 1.8mm (0.07") thick. This gives it more strength and weight at the handle (meaning we can exert more pressure with the heel) and more precision at the tip, allowing for smooth and precise cuts.

BLADE FINISH:
The entire surface of the blade is polished to a clean, highly polished mirror finish that is adorned by a unique spotted damascus pattern. Among the sports, you can see your reflection!
On one side of the blade, a very light, minimalistic laser-etched kanji signature can be seen , while on the opposite side, the type of steel (ZDP-189) is imprinted on the blade.

THE SMITHY:
Yoshida Hamono is a family-owned Japanese company with an age-long tradition in manufacturing state-of-the-art tools and Japanese swords (katanas) by hand. The company has a workshop in the Japanese town of Saga. It is well-known for manufacturing metal products in tested corrosion-resistant materials, such as VG-10, Ginsan and Swedish steel. You can learn more about them and our visit to their workshop here.