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Kasumi Titanium-Coated Knives

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Kasumi Titanium-Coated Knives

FriedShoe

188

Aug 1, 2017

Pretty much feels like a scam. The titanium will do nothing to make this knife perform better or worse and the type of steel used is not disclosed. I think this fits the definition of "snake oil".
According to this site (http://chefdepot.net/kasumi.htm) the steel is "High Carbon Molybdenum Vanadium Steel" at 59 HRC which often translates to AUS-8 or VG-5. Both are okay-ish steels but absolutely not worth the price.
Here's a Fujiwara FKM made with AUS-8 at $75: https://japanesechefsknife.com/collections/fujiwara-kanefusa-fkm-series/products/fujiwara-kanefusa-fkm-series-gyuto-japanesechefsknife-com?variant=28871168131
Bonus points, the Fujiwara is also shaped like a normal knife.

Icywolfe

137

Oct 4, 2017

FriedShoeThe golden colored ti coating actually surface hardens the metal. It works well if the under metal is a soft metal so it reduces edge chipping but on the flip side once you sharpening the edge and expose the softer core you have just another knife. It's half gimmicky it's good till you have to sharpen it. So just go for VG10 blade far simpler to use. Blades that use the golden colored TI coating will always use a softer steel under as the coating doesn't stick unless you use plating which just make the TI coating chip off with the under plating.

FriedShoe

188

Oct 4, 2017

IcywolfeThe coating does not appear to extend down to the edge and so it's only aesthetic. Maybe it helps reduce scratch marks, but that hardly seems important.
Additionally, if it was covering the edge it may help with abrasion resistance but it's certainly not thick enough to prevent deformation of the edge, which is another concern for softer steels.

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Icywolfe

137

Oct 4, 2017

FriedShoeThe coating should be covering the edge unless it's just for other uses like low friction. TiN is a fairly low friction coating and is used for metal on metal contact I suppose it can transfer over to foods but doubt it's worth paying. The coating for the edge doesn't need to be that thick though as it's only surface hardening. The coating doesn't even need to color the metal to surface hardening so I hope they sharpened then applied the coating but even then it will be no use once you yourself sharpen the blade.
Some SOG knives use this coating. A lot of JP cutting utensils use it on the metal to metal contact point. Not fully snake oil but it's just for that 1% betterment. Not sure what is that blue coat though it looks like basic steel surface hardening.

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