little question

skyknife said:
thanks to everyone for helping me!
sorry for my bad language but I actually live in southern germany and my ``high school english`` may not be good enough for that type of conversation.

I own a Natural Outlaw Ergo and it´s defenitely the best knife I ever owned, or the best I will ever own as long as I don´t buy some other busses :D.
I think that, even if infi doesn´t have the same tensile strength as other steels at the same hardness (although I don´t think that), Jerry will know why he developed a new steel which must have been very expensive instead of just using a steel which was already available at that time.
I hope my language is not too bad

thanks again
skyknife
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Hey Skyknife, Keep that NOe, I consider it the epitome of what Busse is all about. The E handle era is what brought Busse knives to where they are today. Its the last of what I would call Function over Form, it doesn't have to look pretty to perform astronomically. I kind of miss that day and age. What brought me to Busse was the over the top performance, and I liked the no nonsense approach to design.
 
Hello

I just want to say that the ergo handle is just perfect for my hand (or is my hand perfect for the handle?!) and it´s so comfortable to work with it.
I got it unused for 275€ (about 340$) and it came with a standard nylon sheath and a kydex sheath. The coating has already started to get smoother.
Does anyone know how much the prices for busse knives decrease when they are used? I don´t want to sell it but I just want to know it :D

thanks
skyknife
 
skyknife said:
Hello

I just want to say that the ergo handle is just perfect for my hand (or is my hand perfect for the handle?!) and it´s so comfortable to work with it.
I got it unused for 275€ (about 340$) and it came with a standard nylon sheath and a kydex sheath. The coating has already started to get smoother.
Does anyone know how much the prices for busse knives decrease when they are used? I don´t want to sell it but I just want to know it :D

thanks
skyknife
Click to expand...

It does'nt seem like Busse's lose very much $$ if used. Then you can always send them to the spa to be made to look like new again.
Well that is with most finishes. Not too sure if they can really duplicate the older finishes though.
 
Well, my Aussie English may not be a lot better than your German English, but I will have a go. But I am tired and off to bed soon, so I’ll try to keep it brief.

Don’t know about the original reference, but I haven’t been around here that long or read that much. In a very general sense the tensile strength or Ultimate Tensile Stress UTS of two steels of 60 Rc will be similar-ish; the difference you are talking about in the OP is less than 5% at most. There will be more spread than that, but not I would think 25% or 50%.

But hardness is more closely related to the Yield Stress (or proof stress), where the steel takes a permanent set, in any event. And this is a much more useful property to know. UTS is only useful when you actually need to fail something – shear it, split it or so on. Yield is what you need to know if you want to use it and be able to use it again.

The way UTS is typically measured can also give what seem like odd results. The stress is calculated by dividing the load applied to your tensile sample by the as manufactured cross-sectional area of the sample, giving your MPa or psi (or ksi). Great until the sample starts to deform under test when the actual stress in the necked part of the sample is now higher than your calculated number based on the original dimension. This doesn’t matter too much in many high hardness, high UTS steels because they don’t deform much plastically before they fail, like glass. So the cross-section of the broken bit is much the same as it was before you started.

INFI though seems to deform plastically or elongate a lot after it has reached yield and this could make the UTS lower than a more brittle steel because the sample will have a substantial necked area. This is usually noted by reference to the elongation until failure or by the reduction in area of the sample at the failure point. So while the actual stress at the failure point may be very high, the number usually quoted as UTS may not reflect it. I’m not saying it is or isn’t, just that this phenomenon is well known in other steels so wouldn’t surprise me if it were true that INFI showed a moderate UTS for its hardness. Sometimes references are noted as true stress or engineering stress. Most quoted numbers are the make-believe engineering ones afaik. I don’t pay a lot of attention to them anyway.

As far as INFI and O1 go, apart from being high strength, high hardness tool steels they are wildly different in composition and I wouldn’t have put them especially closer to each other than any two other 60 Rc steels that I could think of. If they are in anyway unusually close to each other in some properties at this strength it seems like a fluke of nature to me. I guess O1 and S90V would be further apart but INFI seems to me closer to half way between them than it is to O1.

Hope that helps a bit.
 
Thank you sandgrouper!

Your reply helps me to understand how the steel behaves when beeing pulled apart. I wouldn´t have thought that it is so complicated. I think that it´s not right to say that the lateral strength of a steel only depends on its tensile strength but maybe also on its compressive strength because under side loads, one side of the blade is elongated and the other one is compressed.
But a very hard steel with high compressive strength and high tensile strength can also be bad in lateral strength when it´s to brittle or when it´s notched.
But as long as the blade is not brittle the lateral strength still almost depends on its tensile strength doesn´t it?
That would mean that there must be some steels which are better than infi regarding to their lateral strength. But then they may be worse in toughness or wear resistance and so on. No steel is perfect.
Does anyone know how infi behaves when being hardened to 62 HRC?

Thanks
Skyknife

P.S.:Do Busse knives have a powder coating or are they just painted?:D
 
skyknife said:
Hello guys

A few years ago, Idahoskunk compared the tensile strength of infi with the tensile strength of 01 steel (2150mpa at 60 HRC). He said infi would rival 01 regarding to its tensile strength. But 2150mpa is lower than the average value for steels with a hardness around 60 HRC which lies around 2200-2250 mpa. This would mean that most steels with 60 HRC would be better in lateral strength (if the steel is not too brittle). Does anyone know whether his statement was correct?

skyknife
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Obviously you've never met IdahoSkunk ;)
 
LOL :D....I think the reference to Skunk talking about the tensile strength of steel is what threw everyone .... I've never seen him post on stuff like that .... now a query on the strength of some "booze" .... that would be more like it ....:D:D
 
skyknife said:
Hello guys

A few years ago, Idahoskunk compared the tensile strength of infi with the tensile strength of 01 steel (2150mpa at 60 HRC). He said infi would rival 01 regarding to its tensile strength. But 2150mpa is lower than the average value for steels with a hardness around 60 HRC which lies around 2200-2250 mpa. This would mean that most steels with 60 HRC would be better in lateral strength (if the steel is not too brittle). Does anyone know whether his statement was correct?

skyknife
Click to expand...

As you have seen, most that post here "Know what they know" (according to them) most times that don't amount to much worth sharing. The "pro" knife builders will not ridicule for their amusement, they have better things to do with their time. I recommend reading books on metallurgy for your specific questions on metal qualities. Armchair quarterbacks exist in all would be champs
 
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