Heavy-Use Steel

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FFK said:
REvdevil.........your the proof
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Actually, since you've already outed yourself... your presence here pretty much speaks for itself. You're copy/paste routine was just that. If you have any questions, please feel free to hit me up via email. Saying 3V steel is basically junk is the pinnacle of your complete ignorance.
 
REvdevil,
3v is Awesome. OP presents a very extreme environment/conditions. From my point of view.....old school shock steel seems a better choice for his stated requirements, that's all. Now as for your insults......I believe you know what to do with them. Thank you !
 
FFK said:
REvdevil,
3v is Awesome. OP presents a very extreme environment/conditions. From my point of view.....old school shock steel seems a better choice for his stated requirements, that's all. Now as for your insults......I believe you know what to do with them. Thank you !
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Would you please, could you please, show anyone, anything that qualifies you to call yourself a knifemaker? Show us the knives you've made and let us know exactly what you think your innovations are or STFU, clown. JFC:rolleyes:
 
I think FFK and Mad Bull Blades should get together. Now THAT would be a collaboration to see!
 
[video=youtube;dPgSOQY4CDk]https://www.youtube.com/watch?v=dPgSOQY4CDk[/video]



[video=youtube;Wo6vRFgOAAA]https://www.youtube.com/watch?v=Wo6vRFgOAAA[/video]



[video=youtube;IcovoTyGiRg]https://www.youtube.com/watch?v=IcovoTyGiRg[/video]



https://www.youtube.com/watch?v=BFdaIwcHwsI



If someone needs impact toughness or chip resistance beyond this on a knife, and especially on a folding knife...

youre-doing-it-wrong1.jpg
 
If you are after an extremely hard use knife then geometry will be your first concern. As a maker here is what I will would tell you if you wanted to place an order with me.

1.) I can make you a knife from 3/8th S7, temepered to 57-58 with a low convex grind and leave the edge thickness at .040 before sharpening. This knife will be for all intents and purposes indestructible. It will also be unable to cut anything.

or

2.) I can make you a knife from 1/4th CPM 3V HT to 59 with a saber grind and take the edge down to .017 before sharpening. This knife will be able to hold up to anything you can realistically throw at it while also being a pretty good cutting tool that can hold an edge.

Just keep in mind geometry is everything with a hard use knife and that the ultimate purpose of a knife is to cut things. The main benefit of 3V that alot of customers don't realize is that its toughness allows you to use thinner stock and have thinner edges than other steels with similar wear resistance without sacrificing strength. Weight distribution aside, a thin knife always cuts better than a thick one and my goal as knife maker is to make my knives as thin as possible without having them break--this is the whole goal of using new super steels like 3v, Vanadis 4E and Zwear -- to be able to have less steel behind the edge and not sacrifice strength. If an indestructible material like Adamantium existed and we used it in knives, all knives would be the thickness of a sheet of paper.
 
me2 said:
The one that blows them all away is 4340. I just don't know of anyone making knives from it. Hawks and axes, yes, but not knives.
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Could you elaborate? In the chart, there are a couple of other steels with higher values, so I don't quite understand.
 
I'd love to. You have to look at the test used. The 4340 was tested using a v notch. The others were tested using a C shaped notch, where the shape was known at all. V notch and C notch numbers shouldn't be directly compared. Generally speaking, steels that are not tough enough for meaningful testing with a v notch are tested using a c notch or an un-notched sample.
 
me2 said:
I'd love to. You have to look at the test used. The 4340 was tested using a v notch. The others were tested using a C shaped notch, where the shape was known at all. V notch and C notch numbers shouldn't be directly compared. Generally speaking, steels that are not tough enough for meaningful testing with a v notch are tested using a c notch or an un-notched sample.
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So, it's basically in another league, or category, than the other steels entirely?
 
Yep. Carbon content and carbide volume are the big factors in properly ht steel, w/r to toughness. There are some significant changes from 0.4% to 0.5% carbon. The nickel, chromium, and molybdenum help too. 4340 has no undissolved carbide and lower carbon than even S7. The issue is its maximum hardness as quenched is relatively low, and its tempered hardness is correspondingly reduced, though all those alloying elements help some. I'd love to try a knife of it, but they're a DIY proposition.
 
From what i've read 8670 is supposed to be on par with L6 and its what i'm just starting to use now in my non stainless hard use knives (along with 3v if requested) but i never seem to see anyone mentioning it... is there a reason for this or is it just overlooked. I've read nothing negative about it so far and have a Greco made from it which i love. thoughts?
 
RevDevil said:

Saying 3V steel is basically junk is the pinnacle of your complete ignorance.
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Words of wisdom right there. :thumbup: :cool: :thumbup:


In regards to FFK, "better to be silent and thought a fool, then to speak and banish all doubt",

...a lesson lost on some.


I stand by my CPM 3V recommendation. :rolleyes:



Big Mike
 
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