New to ZDP and D2 - Need Sharpening Advice

[chuck_roxas45]

AG Russell's steel chart has CPM-S90V at 56-58 Rc. That doesn't sound right. I've always heard it is very hard. Hard enough that some knife makers don't like to work with it. Maybe what I've heard was wrong.

Jack

I hope Ankerson chimes in, I think I read somewhere spyderco has it's S90V at 59 Rc but it's extremely wear resistant.

[jackknifeh]

I hope Ankerson chimes in, I think I read somewhere spyderco has it's S90V at 59 Rc but it's extremely wear resistant.

59 still sounds low considering what I've heard about it.

This was taken from some document I downloaded once. I just remembered it.
- CPM S90V (420V is the old name) is a very high alloy steel from Crucible Particle Metallurgy. Very high wear resistance coupled with very high corrosion resistance. Ref - CPM S90V Chemical Composition. As you can see alloy content is extremely high. Because of the very high Vanadium content it's really difficult for the makers to work with. Upper limit for hardness is 61HRC. For now, the only maker I know of, making kitchen knives with S90V is Phil Wilson. Sadly, Phil isn't making large kitchen knives anymore. On the other handparing knife from S90V or even small chef's knife is also a very good choice. Perhaps I'll get one later too. I have S90V Lochsa folder from Scott Cook, heat treated by P. Boss to 60HRC. Very good edge holding. Definitely a good choice for a quality kitchen knife if the maker knows how to work with it.

Jack
Edit: We are getting off the original subject.

[Handwrecker]

Spyderco's S90V is 59hc. It has a ton of vanadium and monster carbides giving it crazy wear resistance, which is why it isn't seen often. Unlike ZDP, which is a very hard yet very fine (ceramic-like) steel.

[toomzz]

I have an Edge Pro sharpener. Have you ever seen one? You have what looks like a home made version of it. Execelent work.

Thanks Jack, in fact it is. We made double couple for home use with clamps for triangular stones and one for flat stones. The method is simular and the results and IMHO ´spectacular´ :p It is a huge step forward after resharpening all kinds of knives free hand after 15 years with the sharpmaker stones.

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