HAP40 is a powdered high-speed steel made by Hitachi Steels that can take and hold extremely thin and sharp edges. The edge retention ranks at the top of the list of any steel we currently sell. HAP40 is fine-grained enough to sharpen very well and can be hardened to 64-68 on the Rockwell Hardness Test (HRC)--even harder than the traditional carbon steels used for knives. Contrary to other HSS steels, it can be relatively easily sharpened on normal waterstones, if not quite as easily as traditional steels. Knives from this steel keep their sharpness 3 to 5 times longer than traditional knives. HAP40 is extremely tough, and so not as likely to chip along the edge as the steel used in traditional knives.
have a straight blade edge suitable for cutting all the way to the cutting board without the need for a horizontal pull or push. These knives are also quite thin. This makes them a perfect choice for cutting and chopping vegetables. They have become increasingly popular in American home kitchens for their abilities and interesting look.
Nakiris differ according to the region of origin, with knives in the Tokyo area being rectangular in shape, whereas the knives in the Osaka area are called kamagata nakiri
and have a rounded corner on the far blunt side.
The inner core of HAP40 is covered with a full stainless cladding for strength and ease of maintenance. This is a very fine example of the breed with a nice understated look and fine edge grinds. It comes with a well finished black and gray handle made with akkawood. It's octagonal in shape and really makes a statement.
Please note, the knife sharpener intentionally thins the edges of these knives to make them perform better, especially on the tip area. Often times you will see a hazy/cloudy scratch pattern as a result. This is not a defect.
Construction: San Mai, Laser Cut
Edge Steel: HAP40 Semi Stainless Steel
Edge Grind: 60/40 (ok for left- or right-handers)
Cladding: SUS 405 Stainless Steel
Handle: Dark Gray Pakkawood
Ferrule: Black Pakkawood
Weight: 6.0 oz (170 g)
Blade Length: 165 mm
Total Length: 317 mm
Spine Thickness at Base: 2.2 mm
Blade Height: 48.1 mm
Photos By Gustavo Bermudez