Why does CPM-M4 dominate in national cutting competitions?

cotdt

cotdt

Joined
Oct 2, 2006
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How does M4 outcut all other knife steels in national cutting competitions even though S90V and ZDP-189 have better wear resistance?
 
And where did you get the idea that M4 dominates in national cutting competetions?
 
cotdt said:
How does M4 outcut all other knife steels in national cutting competitions even though S90V and ZDP-189 have better wear resistance?
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because it looks soooooooooooo good in that skirt.
 
the cutting competitions don't use slicing cuts on highly abrasive material, where S90V and/or ZDP-189 would show good results. M4 has wear resistance and toughness in good proportion, and the test blades are subject to impacts and chopping cuts. M4 has been a winner several times over the last few years, but competitor skill and blade design are also contributing factors. Still, it has excellent attainable hardness, toughness, and wear resistance.
 
I guess you shouldn't base your steel decisions on one type of testing.
 
met gayle bradley about one yr. ago & we talked awhile and he showed me his competition cutter made of m4 .now these tests change from contest to contest & competitors do'nt know the menu.at that time most of the contestents were moving to m4.gayle said m4 could be ground extremely thin &not chip.he is'nt a big guy & said it was all about technique not strength.i realize my spelling is terrible &appreciate your patience but if i had to open the dicitionary every other word i could never be in this forum.
 
Did ZDP-189 and CPM S90V were even present on that "National" competition?

What is source of this info?

Thanks, Vassili.
 
ZDP-189 and S90V are not as tough, therefore they cant be used for large competition knives and chopping events. At least I dont think so.
 
zhangmaster12 said:
ZDP-189 and S90V are not as tough, therefore they cant be used for large competition knives and chopping events. At least I dont think so.
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ZDP-189 isn't that tough, but S90V/S30V is pretty tough compared to other stainless steels.
 
I am pretty sure that no one who participated "national competition - whatever it is, was not really looking into ZDP-189 - it is not as available. CPM S90V as well require higher temperature for HT then most furnace can offer - this is why Paul Bos are not working with CPM S90V.

So I am very doubt that this is just because CPM M4 is such a super steel.

It is pretty good, but not as good as ZDP and not as goos as SR101 (good old 52100 heat treated by Swamp Rat).

And all this baseless talk about ZDP-189 not being - tough... I used it against anything - drywall, aluminum, etc. It is tough! Tougher then well known tough steels and also able to hold edge.

Thanks, Vassili.
 
nozh2002 said:
I am pretty sure that no one who participated "national competition - whatever it is, was not really looking into ZDP-189 - it is not as available. CPM S90V as well require higher temperature for HT then most furnace can offer - this is why Paul Bos are not working with CPM S90V.

So I am very doubt that this is just because CPM M4 is such a super steel.

It is pretty good, but not as good as ZDP and not as goos as SR101 (good old 52100 heat treated by Swamp Rat).

And all this baseless talk about ZDP-189 not being - tough... I used it against anything - drywall, aluminum, etc. It is tough! Tougher then well known tough steels and also able to hold edge.

Thanks, Vassili.
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Tough enough for a large fixed blade during some heavy chopping? What large knives in ZDP do they make aside from chef knives?
 
I don't think there are a lot of makers making 10" blade knives with M4 (one for sure is Mr. Bradley), so each maker has to weigh all the factors, all the while with 100% surety that the knife will not fail during the competition. A through hardened M4 blade is more likely to fail in a catastrophic mode than a differentially hardened 52100 knife, so the maker has to have that comfort level, or they will lie awake thinking about their competition knife failing catastrophically and doing a repeat of the {HSN knife dork w/cheap katana} on themselves or a competitor using their knife. That would be much worse result than 5th place.

Compressive strength may be the determining factor in resisting rolling (inversely proportional to hardness for a given steel), and too hard can cause brittleness and chipping. They have to combine the characteristics with a big thin edged chopper.

I like mine out of forged 3V - it is one mofo chopper!

DSC05036.jpg
 
nozh2002 said:
I am pretty sure that no one who participated "national competition - whatever it is, was not really looking into ZDP-189 - it is not as available. CPM S90V as well require higher temperature for HT then most furnace can offer - this is why Paul Bos are not working with CPM S90V.

So I am very doubt that this is just because CPM M4 is such a super steel.

It is pretty good, but not as good as ZDP and not as goos as SR101 (good old 52100 heat treated by Swamp Rat).

And all this baseless talk about ZDP-189 not being - tough... I used it against anything - drywall, aluminum, etc. It is tough! Tougher then well known tough steels and also able to hold edge.

Thanks, Vassili.
Click to expand...


that's just not true. I was using my ZDP-189 knife to cut up some teeth for a stew and it fell apart. I have no idea what you're talking about, but I wish you'd stop lying all over the forums. it's bringing me down, man.
 
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