What Steel Holds an Edge the LONGEST?

[tom mayo]

Well?

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http://www.mayoknives.com
Jer 33:3

 

[Paracelsus]

I don't know what steel it is made from, but my Razor of Occam has not needed sharpening in over 800 years.

As for the real question, I think the best answer is that Nobody really knows

Paracelsus

[This message has been edited by Paracelsus (edited 12-02-2000).]

 

[samwereb]

That which is never used, sensei.

 

[Kodiak PA]

Any knife by Tom Mayo.

 

[Will York]

Tom--
Great question. I'd think the application/task would have a lot to do with which steel's edge would last longest. If you were going to chop hard stuff, obviously a tough steel would hold up longer, but that same steel might not outlast another in edge holding on softer materials.

From Cliff's testing, it seems you'd be hard-pressed to find a steel that outlasts CPM 10V @ 62-63 RC, if cutting relatively soft material with a thin edge is the application. CPM 3V would have to figure in, especially if impacting on harder stuff, or torquing against hard stuff, is part of the edge-wear process. Lower carbon and vanadium than 10V, but remains more ductile than 10V at hardness into the 63 RC range. Stellite 6K also seems to offer unusually high performance in applications where a thicker edge is applied in shearing operations. I think Kelloggs, the cereal maker, showed edge life improvement in the range of 90% over 440C, with scraper blades made of 6K. Wouldn't it be great to see head-to-head competition among those three materials, with optimal geometries and heat treat, on a variety of tasks?

Do you have an opinion on which material holds an edge longest, Tom?

--Will

 

[HermanKnives]

Hermanite too bad you cant get it

na na nananana

 

[tom mayo]

you mean its a secret right? I think sam hit the nail on the head! Am making some knives out of 3v at present....but up to this point I am the MOST impressed with 420V....I understand 52100 is right there with 420V, but no being a pounder I have no experience with the stuff.

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http://www.mayoknives.com
Jer 33:3

 

[Danbo]

Vasco Wear is some really good edge holding stuff, and it is a bear to grind once its hardened.

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Danbo, soul brother of Rambo

 

[copfish]

Having knives of VG-10, ATS-34, 154-CM, CPM 440V and CPM 420-V. I would have to say my Talonite holds the edge the longest. But then, Tom you know that...

Talonite Rulz!

 

[Gary W. Graley]

420V, from what I hear is pretty dog gone tough, might get something from PJ Tomes at the Show next weekend, I know he favours that steel a lot!
As does Darrel Ralph, tough stuff right Darrel?

G2

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"The Road to Hell is Paved with Good Intentions!"
Take the time to read your Bible Now, don't be left behind...

 

[Easyrider]

Whatever they make Ginsu knives out of.

 

[Paracelsus]

420V is supposed to hold an edge for a good long time. But, I do not think it is the toughest stuff around. Great for small folders, but I wonder about how good it would be in larger knives where some chopping, bending, or prying might be attempted.

According to Crucibles web sites, 3V should hold an edge several times longer than 420V, and be much tougher at the same time. 420V is listed as several times better in wear resistance compared to 52100, but less tough.
Check out the listings for cold and plastic forming tools: Crucible Particle Mettalurgy steels

Paracelsus, noting that many steels make great knives. There is no Best steel

 

[Dr.Lathe]

Tom,
Allow me to "cast a vote"....

for Titanium Nitride Coated Carbide

............... I know, I know but really, neither is Talonite!!!
Neil

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Talonite......Stellite
Knives in STOCK!! I just updated my website, PLEASE take a look


blackwoodknives.com

 

[tom mayo]

well.....I HAVE a tool and cutter grinder, and a LOT of diamond wheels....but I really am not looking to buy a bar of carbide... kinda pricey and VERY BRITTLE!!! BTW Vascowear SUCKS bigtime...and doesnt hold an edge any better than 420V...rusts while you look at it....I HATE VASCOWEAR!!!!!! Having talked to quite a few guys about 3V...I dont believe it is in the same league as 420V for edge holding...more like D2....but WAY tougher than both of them.....If any of you have any .187"x 1.25" x 8" bars of solid carbide...........send them to Neil...Im not interested.........

 

[Roy]

Out of what I have available I am inclined to go with D2. I have yet to get my hands on any of the CPM steels other than 440V but am eager to try them out(esp 420V and 3V).

 

[Dr.Lathe]

Tom,
Wait a minute!!! I never said I wanted to make a knife out of the stuff

In addition to being brittle it would also be VERY heavy!!
Neil

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Talonite......Stellite
Knives in STOCK!! I just updated my website, PLEASE take a look


blackwoodknives.com

 

[Walt Welch]

The only data of which I am aware on this subject are the Wayne Goddard Edge Holding Tests:

http://www.ameritech.net/users/knives/edge.htm

My Tom Mayo Talonite (r) knives are as sharp as when I received them six months ago, but then again I haven't CUT anything with them!

Walt (gratuitous kitten pic below)

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[This message has been edited by Walt Welch (edited 12-04-2000).]

 

[bbtjohn]

Tom,

That's like asking from how deep can a SEAL dive from a submarine!!

Are you crazy? I'm not gonna answer this question.. I don't know it it's still classified or not...check online or something. What are you doing on this forum??


Gary

 

[bbtjohn]

Tom,

That's like asking from how deep can a SEAL dive from a submarine!!

Are you crazy? I'm not gonna answer this question.. I don't know if it's still classified or not...check online or something. What are you doing on this forum??


Gary

 

[C4]

Tom,

I thought you knew! Or is this just research to confirm steel for for my fillet knife?


<CENTER>Subjects for edge testing (not Walt's kittens)
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Michael

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He who has smelt the smoke is never free again...