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Aritsugu 18 cm A-type wa-petty

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KCMande said:
I don't know a whole lot about Aritsugu, what sort of steel is this?
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It is an undisclosed stainless used by Aritsugu in its A-tyoe knives, which includes gyutos and sujihikis as well as petty knives. This is an excerpt from Gator's website (Zknives.com) about the steel:

Steel - The makeup of the steel that Aritsugu is using for his A-Type knives is not officially published, but referred as Gokinko. Actually, after couple years of chasing the composition of that steel, I am not even sure if A-Type isn't another name for it. Either way, thanks to KF member Rottman, now we do have gokinko steel composition. He was kind enough to send his knife for testing to the lab and the exact composition came up as following: C = 0.987%, Mn = 0.30%, Cr = 7.03%, Mo = 0.304%, W = 0.217%, V = 0.127%. It's a proiprietary steel, although somewhat close to Vascowear steel, however, later has higher amounts of Molybdenum in it. With 7% of Chromium in it, Gokinko or A-Type steel does have some degree of stain resistance.

You can find his entire review of a 27 cm gyuto here: http://zknives.com/knives/kitchen/ktknv/aritsugu/aritsugugy270.shtml
 
Measurements as requested:

Weight: 66 grams
OAL: 319 mm
Edge length: 177 mm
Height at heel: 30 mm
Spine above heel: 1.9 mm
Spine halfway to tip: 1.6 mm
Spine 1 cm from tip: 0.9 mm
 
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