Why is 13C26 better?

Hmm, I never remember reading that Mo contributes to corrosion resistance or that is forms smaller carbides than the Cr-carbides. I need to look that up in the phase diagrams.

Yes, 13C26 and AEB-L are very fine grained. They have to be, imagine a razor with a corse steel structure. It would rip the face instead of shaving it.

The edge will never be sharper than the radius of the biggest carbides. Carbides cant be ground down, they either stay or fall off.

//Jay

BTW, it's midnight here now so I'll sign off, bye.
 
In regards to your above statement (cheaper rather than better) Cliff ...

Reread the post, I never made the arguement, I suggested that a high carbide steel would be more suitable for obtuse edges, it was then contended that Kershaw could be using 13C26 simply because it was cheaper and that was a good thing becuase the average consumer would not appreciate the the higher wear resistance of the other steel anyway. I noted that if was the case then it would be obvious that it would not be something to actually be praised and there are cheaper and easier to work Sandvik steels.

Small carbides will give the hardness required->edge retention.

The hardness doesn't come from the carbides, martensite hardness is a function of the hardness in the steel. 13C26 can dissolve 0.6% carbon at 1100C so it basically can be full hard as quenched. That limit is never realized outside of ideal because of austenite stabilization and secondary carbide precipitation. There is an influence of carbides formed during tempering on hardness in some steels (154CM for example) but this isn't a factor in the Sandvik stainless as they don't have a strong temper resistance due mainly to lack of molybdenum.

The edge will never be sharper than the radius of the biggest carbides. Carbides cant be ground down, they either stay or fall off.

Carbides can be ground by suitable abrasives, they do however limit the edge angle rbecause as you pass a certain level of acuteness there will not be enough steel around them to hold them in place during the abrasion. They will also get torn out of the edge easily in use with acute profiles as well.

Kershaw needs to produce knives that are resistant to these failure modes even at the expense of edge holding or optimum edge performance.

If a steel doesn't give the properties required then instead of underhardening it, switching to another steel usually gives a better balance of properties. Sandvik has two steels which are specifically designed for a higher toughness and corrosion resistance. This is why I noted several months ago I would like to see Spyderco do a sprint run in 13C26 because it could be offered in a geometry and hardness which were both optimal for the steel such as they have done with several knives in ZDP-189.

-Cliff
 
This is why I noted several months ago I would like to see Spyderco do a sprint run in 13C26 because it could be offered in a geometry and hardness which were both optimal for the steel such as they have done with several knives in ZDP-189.

Not a bad suggestion as I'd certainly buy one from Spyderco, but reading this about the geometry makes me want to recommend to you that you get your hands on one of the Storm II knives in this Sandvik steel.

The primary grind is quite thin on the Storm knives. The knife is very sharp and in fact reminded me of some of my thin grind Spydies.

I still contend that this SII knife and the original Storm are both some of the better values for the average working man wanting a good larger everyday carry knife for a good price. At $30 at any WalMart for the Storm II its a heck of a deal and in my opinion being made in the USA at that price point in that blade steel makes it all that much more appealing. The absolutely flawless frame lock in stainless is also a nice feature. For those wanting a smaller knife the Vapor has a lot going for it but I wish it was in the same steel. For what its worth, when I first saw this knife in the case at my local Wal-Mart it was the thin primary grind and grippy inserts on the non lock side that sold me on the knife, not the steel. At the time I was unfamilar with the steel and had to come home to look it up. After reading all the plus features about it and great feedback I thought maybe the knife was priced wrong.

STR
 
... to recommend to you that you get your hands on one of the Storm II knives in this Sandvik steel.

What is the edge configuration?

I still contend that this SII knife and the original Storm are both some of the better values for the average working man wanting a good larger everyday carry knife for a good price.

How do they compare to the Byrd line in performance/cost?

For those wanting a smaller knife the Vapor has a lot going for it but I wish it was in the same steel.

That is the heat treatment again, that is the same class of steel and the properties are very similar to 13C26. This would be similar for example to comparing 1080 and 1084. Unfortunately the AUS series of steels has basically had its reputation as a knife steel scuttled due to underhardening and overly thick edges which has had them percieved now as "low class" performers, AEB-L was looked at that way for a long time and labeled basically as a 440A variant. However if the hardness is raised and they are used properly in very acute edges then something very different is seen due to the high edge stability given by the low carbide volume.

-Cliff
 
Comparing cost-performance between US vs China products is unfair because of well known unfair dollar to yuan exchange rate. This is demping prices and I guess if you take real exchange rate (wich can be gotten by comparing BigMac prices in China and US) then Storm II will have way higher cost-performance rating.

Thanks, Vassili.
 
How many posters would readily describe in public a serious problem with a knife well known and very popular maker and contend statements made by the maker.

Few indeed. If any.

How many people would readily praise in the reverse senario or post agreement.

What is the reverse scenario?

________________________________________________________________
(Only responding to these questions, with no reflection on Kershaw's knives.)
 
What is the reverse scenario?

Public praise or agreement with a maker/manufacturer. An enviroment where this is favored and encouraged but the other is not (criticism and disagreement) has created a hype engine.

-Cliff
 
Critisism is a bitter pill to swallow for all of us Cliff but those with reknown carry more weight when they speak pubically and sometimes it is deserving sometimes not. I feel at times more public figures have locked themselves into a certain train of thought or ideal as to the best way to do things only to find that they are incapable of seeing past their own pride and/or routines to move forward and improve on something. It is easier to maintain the status quo for most. I see pride getting in the way a lot with some in particular in the industry though that think they have "made it" and that therefore their ideals and ways of doing things are the best way or only way it should be done and that all other ways are invalid or improper and not worth looking into.

This is particularly true in the liner and frame lock making which has been discussed at great length. For more reasons than the testing and numerous faults in lock defeats brought out the integral lock type is the most controversial of all types of locks used in folder making. Even the pros can't answer questions about the techniques without difference in opinion as to which is the better or correct way to do them. I have always applauded those in the industry such as Sal Glesser to be able to look past the hype, see things for what they are, acknowledge it and move past it to a better lock. Because of this attitude we have some of the best locks to come out of the industry in the last 250 years.

STR
 
Public praise or agreement with a maker/manufacturer. An enviroment where this is favored and encouraged but the other is not (criticism and disagreement) has created a hype engine.

-Cliff

Not exactly sure what you are speaking of here.

You made an initial statement:

Cliff Stamp said:
Even though 440A has more carbon than 13C26, 13C26 actually has more carbon in the steel when hardened and enough chromum to give high corrosion resistance. Kershaw is underhardening it so the performance isn't ideal, and some have been critical of it such as kel_aa, but care needs to be taken here to note this isn't the steel but the way it is hardened.

AND

Cliff Stamp said:
Witness for example how CRK&T gets severly criticized for using "low end" steels but Kershaw uses the same steels in many knives but the same lambasting isn't applied to them. You can see this obviously very clearly if you go to individual forums which have the same effect but it is now so strong that it almost removes any criticism.

Beyond the fact that you have shown yourself to be wrong multiple times on BladeForums, and ignore direct challenges, very little "censorship" or shout-downs happen on the BladeForums.

THOMAS W. encourages people to voice legitimate concerns, so does Sal Glesser. What exactly do you want, Cliff?
The biggest hype machine that I have ever seen on BladeForums was your drum beating on how makers and manufacturers were fooling everyone with S30V as their choice of steel.

STeven Garsson
 
I'd like to elaborate on my expereince of 13C26 that has been quoted by Cliff:

The Cyclone knife is a passaround knife that I touched up/sharpened 4 or 5 times myself. During the sharpening I had to balance trying to achieve results and not taking off too much metal as the knife had been [labourously] ground down by the_mac (my commentary). The facts were that it was very difficult for me to deburr given my equipment and skill. If I cheat a little and just align the edge, it would roll relatively quickly. The wire-edge is very small and as I noted it would frequently still be able to shave on both sides. Whether this represents a postive experience would have to depend on the user. Given the same situtation, I'm sure there are a portion of people who would never have noticed the wire edge, a portion who would notice and not be bothered, a portion who would be bothered, and a portion who would be able to solve the given burr issue. I was bothered by this as I do not believe a wire edge leads to an good a target sharpness and edge retention.

Thomas W said:
I'm gonna say it again, I'll take the positive and supportive words of our customers and the majority of 13C26 affirmative posters on this forum, over the minute minority.
I have confidence with those on the board that they report what they experience, and believe them when they say the 13C26 Kershaw Knives they use have been positive.
The ELU is not looking to make an impression with me by lying about the performance of their knife! Please, let's give the members here more credit than that...
These and so many other real world occurrences confirm with me that we are working 13C26 accurately...
.
Cliff said:
Public praise or agreement with a maker/manufacturer. An enviroment where this is favored and encouraged but the other is not (criticism and disagreement) has created a hype engine.

hypeengine.jpg
 
Public praise or agreement with a maker/manufacturer. An enviroment where this is favored and encouraged but the other is not (criticism and disagreement) has created a hype engine.
I don't see it. Now it's probably true I'm less critical than you, where knives are concerned. This is at least partially due to the fact I'm nowhere near as knowledgeable as you in the field. Not even in the same universe. But still, I'm a critical customer and a critical reader/reviewer/researcher. I don't see BF as a "hype engine." I see it as a place where people like knives and knife collecting, and most of them are at least relatively pleased with (most of) their collection. What I see happening is when somebody does criticize a knife or a manufacturer, those who own or have owned the same knife, or those who really, really like a particular manufacturer, counter. It's just human nature.

Here's another aspect of human nature, and I'm as guilty as the next person: When somebody buys a thing, be it a knife or whatever, they tend to want to like it. They tend to become invested in it. Depending on how good they are at seeing what's really there, as opposed to seeing what they want to see, they may continue liking the thing, to the point of continuing to praise/recommend it, even when the thing really hasn't met their expectations and, deep down, they're really not all that happy with it.
 
The facts were that it was very difficult for me to deburr given my equipmen and skill.

What equipment are you talking about. I use diamond powder on leather and it deburr everything.

Thanks, Vassili.
 
Nozh2002: I mostly used a Sharpmaker and played around with a small (1x4 inch) medium Norton grey/blue stone and and a piece of green CrO loaded cardboard from the_mac.
 
This is particularly true in the liner and frame lock making which has been discussed at great length.

Yeah, that is an obvious example of how an industry standard, does not indicate quality. Once you accept this is true then it precludes the use of that arguement in general, you can not use the commonality of any method or materials to assign quality. Would you argue that steel fads do not exist for example?

What I see happening is when somebody does criticize a knife or a manufacturer, those who own or have owned the same knife, or those who really, really like a particular manufacturer, counter.

Yes exactly, now consider it is common when negative comments are made that the methods and logic are significantly questioned (which is good) but the same standards are not held to when praise is given (which is bad). Have you really not noticed this? If you accept this is true then it is obvious that it creates an enviroment which is biased in terms of promotion over critical evaluation.

Now look at the responces in the above specifically, I have provided published materials data to support the position outlined and the responce from Thomas is simply one of a character attack and vague assertions with no details. You see this has having a positive effect on information flow and it encourages people to demand proof of claims from manufacturers/makers?

It as reasonable to refer to the published work of a knifemaker and metallurgist who has worked in the steel industry and specialized in cutlery as "obscure" especially when he has been an active member of the several online forums for quite some time, including this one and posted many times about heat treatment of steels in detail.

Several months ago when I first raised this issue in responce to Kershaw's hardening of 13C26 it was ran softer than it is now. Now I am not suggesting this was simply in responce to what I said, but it seems utterly absurd to keep arguing that the point I made then was somehow invalid and without merit when the solution to the criticism I proposed was actually partially implemented.

Take the viewpoint I have outlined here in regards to 13C26 and heat treatment, do you not see me consistently raise the same points in regards to steels in general regardless of who makes them? Of course I have (for years now) and thus the accusation by Thomas is 100% without merit. This is productive?

Note the issues raised even by Thomas directly that they are having problems with corrosion resistance and others such as reported by kel_aa are directly the result of a heat treatment which is less than optimal for exactly the reasons I described. Instead of discussing this in detail it is ignored and then dismissed in kel_aa's case because he isn't in the majority which doesn't even consider the level of objectification of the data which is just absurd.

You again see this as an ubiased commentary directive? Now of course you would not really expect to see this from any manufacturer, who for example links to negative reviews of their product, but look in general at the surrounding atmosphere and does it encourage or attempt to confine such direction?

When somebody buys a thing, be it a knife or whatever, they tend to want to like it. They tend to become invested in it. Depending on how good they are at seeing what's really there, as opposed to seeing what they want to see, they may continue liking the thing, to the point of continuing to praise/recommend it, even when the thing really hasn't met their expectations and, deep down, they're really not all that happy with it.
Yes, that was one of the points I raised, though not as clearly stated. This is why as I have noted many times before you have to take steps to eliminate user bais if you are interested in actual representative information. This can be achieved by both the user and the manufacturer in many ways. Primarily you don't create it in the first place as ideally the test group doesn't know anything about the blades but even if they do you can prevent any possible preference bias from being an influence if it is desired. Of course the latter is critical, you have to be able to accept the fact that the product you spent your money on wasn't actually the best choice. This is an issue for many which is why there is a lot of defensive reactions.

-Cliff
 
I do not see Kershaw as locked in like this to where they will not accept critisism, nor Thomas. In fact quite the opposite. They are more than open to change, examining facts, looking into suggestions made and said here by those that offer up things worth looking into including yourself Cliff. I have lost track of how many times this has happened with Thomas in particular. He seems to have his ear to the ground to me. This fact stands out to me as obvious.

I've even had some makers as much as tell me I don't rate when I made a comment or suggestion just because they don't know me or because I don't have that international or national reknown to merit as worthy in their eyes. Like how dare I make mention of this to them. Thomas and Kershaw in general do not fit into this category. I find this to be a shame with the ones that do because some of the most astute and accurate observations and suggestions I have ever recieved or read here and on other forums have come from end line users and guys that know nothing about making knives but know enough to see an area that needs work. I personally know men that are all thumbs themselves who are responible for folder designs that are currently in production just because of a suggestion like this. It always pays to have an open mind. Even a child can make a suggestion worth listening to. More people should remember this.

STR
 
Sooooo Cliff.

If Spyderco were to do an experimental spring run with 13C26, as you suggest, what type of knife design (folder/fixed,size,thickness,etc) would be best for this steel and what, in your opinion would be the optimal hardness and grind?

Anyone else with an opnion would be appreciated as well.

sal
 
Sooooo Cliff.

If Spyderco were to do an experimental spring run with 13C26, as you suggest, what type of knife design (folder/fixed,size,thickness,etc) would be best for this steel and what, in your opinion would be the optimal hardness and grind?

Anyone else with an opnion would be appreciated as well.

sal


How about a very thin & lightweight FRN handled gentlemans type folder, 2.5-3" blade, with a very high and thin hollow grind or flat grind, and 7-8 degree per side edge, and an edge under .010" thick at the top of the bevel. I have borrowed Cliff's modified Fallkniven U2 (much thinner and more acute than I mentioned), and it cuts like a dream, sharpens on a 15 degree microbevel instantly, and is a great cutting tool. Of course, as a manufacturer you would then end up with people chipping the edge if they try to use it for hard twisting cuts, but the light construction and gentleman's design hopefully would lead more ELU's to use it as intended, a great precision cutter. Don't ask me about heat treating, as I know nothing, but I know I would buy a Spyderco design like that for a light duty EDC.
 
Back
Top