Which steel would YOU prefer: CPM 4V or CPM 20CV?

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I recently tried my hand at making a couple of knives, and had a lot of fun, and was surprised by the results. I want to make more! I'm looking to make around 10 blades to take advantage of the bulk pricing at Peters Heat Treat. That means, as much as it pains me, I have to make them all out of one type of steel. I am not a paid member here, so I won't be selling any here. Maybe if they turn out nice, I'll try that in the future. But I wouldn't want to sell something here until I was confident in my product. I am not close to that point. So for now, I'll likely keep 2-3 and sell/give as testers/gifts the rest to friends and family for just over the cost of materials/heat treat to break even, or come close. I will, at least, post pictures and all for you fellow knife nuts to see how it's going.

My question is which steel would you guys prefer? I want to make sure I'm using something that the friends and family that end up with these knives will like. I have narrowed it down to CPM 4V and CPM 20CV. Personally, I really want to go with the 4V, but I worry about giving/selling a non-stainless knife to a friend that won't take care of it, and they end up unhappy because it's rusted to hell. Of course, I would tell them how to take care of it, but that doesn't mean they actually would. That makes me think that I should stick to stainless.

These knives will mostly be 3.25-4.00" (blade length) fixed blades, of various shapes that I've drawn out. I might also try my hand at a folder for myself, but it just depends. My cousin also wants me to make him something similar to a USMC Ka-bar, but slightly smaller. I'm not TOTALLY against other steels, but I'm pretty set with these two. If you think I should use something else, and make a good argument for it, I'm willing to consider your opinion. I know several of you will likely tell me to start with something easier to grind, but the two steels I've already used were pre-hardened M2 and CPM 10V, neither of which was terribly hard to work with (except drilling that M2!), so I'm ok with tough grinding. I'm only making about 10 knives, after all.

So what say you? If you were my friend or cousin, would you rather have 4V or 20CV, and why?
 
In that size I think I would prefer 20CV, I think the extra toughness you could get out of 4V would be moot at that length, for most edc uses.
 
Stick with 20CV or others PM stainless like CPM-154, XHP. Corrosion resistance is the most importance property for smaller blade.
 
Stick with 20CV or others PM stainless like CPM-154, XHP. Corrosion resistance is the most importance property for smaller blade.

I think you're right. Toughness isn't a huge concern with these not likely to be used for chopping or other such tasks. I can just see problems with non-knife-people and carbon steel. I'll give it another day of thinking before ordering.
 
Stick with 20CV or others PM stainless like CPM-154, XHP. Corrosion resistance is the most importance property for smaller blade.

Depending on what it's being used for. In my (limited) experience 4v is a well-rounded steel that won't have corrosion issues unless you utterly neglect it. A wonderful meld of toughness and wear resistance.

Also would think that a bit of added toughness, maybe haphazardly popping out a knot while carving wood, would lend itself to a beginner or novice.
 
Depending on what it's being used for. In my (limited) experience 4v is a well-rounded steel that won't have corrosion issues unless you utterly neglect it. A wonderful meld of toughness and wear resistance.

Also would think that a bit of added toughness, maybe haphazardly popping out a knot while carving wood, would lend itself to a beginner or novice.

Damn. I knew no clarity would result from this. I was hoping I'd hear something to make my choice easy. Thanks for the input guys!
 
On a small fixed blade knife that's more likely to see camp chores/skinning/food prep, I'd go with CPM-20CV. Its a stainless, easy to sharpen, holds a good edge for a long time and its a great all around steel. Now for the USMC Style knife I'd go for CPM-4V. Still easy to sharpen, but tougher for a knife that could see some rough use.

Good luck!

Pix when you make them, please!! :thumbup:
 
On a small fixed blade knife that's more likely to see camp chores/skinning/food prep, I'd go with CPM-20CV. Its a stainless, easy to sharpen, holds a good edge for a long time and its a great all around steel. Now for the USMC Style knife I'd go for CPM-4V. Still easy to sharpen, but tougher for a knife that could see some rough use.

Good luck!

Pix when you make them, please!! :thumbup:

I'll definitely be sure to post lots of pics!
 
My vote is 20cv/m390 all the way!! Especially for that size, but even for a larger knife, I'd much rather have the best super stainless available today. It's plenty tough for any knife task...again, esp. for that size, but I really dig my 5-7" bladed knives in this steel, Elmax, & s90v....though 20cv/m390 is my personal favorite.

To me, if one steel offers great corrosion resistance & edge holding, with plenty of toughness, and the other option can't say all of that....I'd go with the stainless. But it's your show my man, I'd love to see pics as well - best of luck!!
 
Damn. I knew no clarity would result from this. I was hoping I'd hear something to make my choice easy. Thanks for the input guys!

People tend to want to use their knives different ways. The only reason I would want a small fixed blade instead of a folder would be its increased strength, so I would pick a steel with good toughness. Other people have different needs and wants. Some people want to EDC a small fixed blade and they might prefer good edge-holding and corrosion resistance.
 
I've had folders in both steels and I like 20CV more personally, not only because it is very stainless and easy to take car of, but becasue it is also a little bit more versatile in my experience.

What I mean by that is that 20CV if very good at performing well with both abolished edge and a slightly toothy edge, and can be a very good high-efficiency slicer in very thin blades, but still holds well in thicker stock.
Not to say 4V can't do that as well, but it does it a little less reliably, and it doesn't have the added bonus of being stainless.

I like both, but I would take 20CV in a folder 99% of the time. 4V is better suited to a medium (4"-5.5") fixed blade in my opinion, where more of the steel's strengths can shine.
Especially if you're going to be focused on good cutting ability for EDC, 20CV is the better steel likely. If you are making these more for outdoors or heavier use, then maybe the 4V will work better.

Also, 20CV is a little easier to cleanly machine and work with than 4V form what I know.
I can tell you that if you made knives in 20CV, I would be buying them right up, but 4V I would have to think about for a little while since I often work outdoors when it's wet and stainless is a priority for me.
 
In that size I think I would prefer 20CV, I think the extra toughness you could get out of 4V would be moot at that length, for most edc uses.

I’ve got to respectfully disagree with this. Thin blade geometry (acute apex angle and thin behind the edge) is the most important factor in cutting ability. And the key to keeping a thin edge stable is toughness (prevents chipping) and hardness (prevents rolling).

So steels capable of high toughness and hardness are the best steels for thin edges.

Assuming I’m right about the above (and I’m open to critiques!), I believe it calls into question the notion that toughness is only important for big choppers and the like.
 
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