The Composition of Infi and What it Means

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AntDog said:
It's a direct quote, so I didn't have much to do with it other than posting it here.

Maybe Mike Turber was incorrect about what he saw Jerry Busse do. Others who witnessed at least part of the test were Les De Asis, Kit Carson, Rob Simonich, Bob Taylor, and I believe Kevin (Spark) watched the entire test with Mike.
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Understood. I hope you know I wasn't criticizing you in any way, only commenting on the nature of the claim within the quoted text.

What little video evidence I've found of testing on INFI looks more like this, which makes me wonder how the famous cut tests we've heard about actually went down. In Pete's testing, it worked just about as well as can be expected based on properly hardened, lower alloy tool steel.
 
ace said:
Unfortunately, this doesn't tell us anything really. The tests were done around 2000 with modified INFI, whatever that is. No information was available even at the time of how the knife was sharpened, how much force was used, etc. If I remember correctly they used 2" of the blade to do the cut and used 1" manila rope (could be wrong), but that is about all... bottom line, stuff like this is maybe interesting to read about, but is pretty useless from a scientific stand point. This is also why there are strict specifications for blades used in charpy and similar testing and why material with known attributes is being cut using a machine that cuts the same way every time.
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I don't think the claim of "science" was made. Just a cut test with a few industry icons.

As for the op, I'm not sure what relevance 10 year old tests have on discussing a steel that has been tweaked over the years. I'd advise buying some and testing it yourself. It would make a more informative write up and could even be fun.
 
Larrin said:
I will stop talking about 10 year old composition tests if everyone else agrees we can't talk about 20 year old rope cutting tests.
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@AntDog is just a knife user dude, much like the rest of us (me included). You're a metallurgist. Bit of a higher standard don't you think. If you're going to come on here and pimp your craft and website every few days, I think it would be good for you to buy and test what you are talking about.

Just like the crystal weaving nonsense, you should be able to explain your argument. A couple 10 year old articles is not a good argument for a scientist to make. Buy some infi and give it a test. If you can't do that I'm not sure what we are here discussing.
 
I’ve never met a metallurgist who throws away test results after a fixed period of time.
If I buy one and test it myself how long is the test good for?
 
Larrin said:
I’ve never met a metallurgist who throws away test results after a fixed period of time.
If I buy one and test it myself how long is the test good for?
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It would be current to the moment in time of the test.
 
I'm not even sure what time period this infi is from, but all the wear on it is mine. Beat the snot out of it. It is a very good steel for what it is supposed to be used for. I'm not going to go on a huge metulergical discussion on it though, because I'm not a metallurgist and even if I were I have no idea what it is actually made of.

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From the Wikipedia article on Moving goalposts:
“Moving the goalposts is an informal fallacy in which evidence presented in response to a specific claim is dismissed and some other (often greater) evidence is demanded.”
It’s a good tactic to dismiss evidence but ultimately isn’t “scientific.”
 
Although it would be interesting and ideal to test current composition, aren't we attempting to address 10 year old claims?
 
Larrin said:
From the Wikipedia article on Moving goalposts:
“Moving the goalposts is an informal fallacy in which evidence presented in response to a specific claim is dismissed and some other (often greater) evidence is demanded.”
It’s a good tactic to dismiss evidence but ultimately isn’t “scientific.”
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Yes, I know what it means. I didn't move any goal post. I'm making the same request I did in my first post in this thread.

I'm not sure discussing ten year old test results that you didn't do is relevant today. It might be interesting historically but it doesn't really apply to infi being produced today. Why not get some and do your own analysis. I think everyone would find that immensely fascinating. Your blog would blow up.
 
Its still a great steel no doubt about that ;just like sr101 is a well heat treated 52100;my only gripe is the very limited and exclusive availability of the knives. To do a quick run of a model then drop it after a few weeks sucks. They should take 10 or 12 of their most popular models and just make the damn things available all the time.And the high prices don't help either. strip that powdercoating off and youll see a blade that has a pretty rough finish; it sure isn't a rockstead under there,ill tell you that.I do have a mofo which I like a lot, it was stripped and I like its looks,but I wont be buying this brand on a regular basis with the prices they go for....
 
Larrin - thanks much for your contributions and the interesting conversations they stir up. And for your patience :)
Everyone - I think folks are going a little overboard on reading into the intent of the original post - it was just a metalurgist's perspective on steel composition, not about Busse or knives.
I own a small pile of Infi and I like the knives, but they are not my primaries for edge-holding and cutting. Usually too thick, but I still like them, they are very well made, good designs. I still have a couple of original Swamprats with Res-C handles in my field pack and they are really really good knives. In SR101. Someday I might sell the Busses, but I like 'em. Larrin never said anything that should make owners and users feel diminished ;) Just his usual close-up inspection of a steel.
OK, back to the barn (me I mean, chores to do).
 
craytab said:
Which can be interesting in itself but has very little real world value to the end user buying infi now.
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Where's the proof that INFI has been changed in the last ten years. Without a current data sheet, someone making claim that it's been changed doesn't hold water.
 
Ajack60 said:
Where's the proof that INFI has been changed in the last ten years. Without a current data sheet, someone making claim that it's been changed doesn't hold water.
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Then let's ask the metallurgist. Test it. Would be very interesting to know and make for a more relevant discussion.
 
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