CPM 15V: Strength is more important than toughness.

For a small knife, strength is more important than ductility for edge holding. We want resistance to deformation at the edge.

[@zachstuff]

Now that is how you do some work with all 15 of the V'S!!!

[@brandonmaples]

Thank you Shaun for the testing showing the actual capabilities of 15v🤙🏽 #FearNoSteel

[@nickhathaway4617]

Thanks for being part of the knife community that is my dream knife right there with your edge

[@taylorhickman84]

I tend to agree, and as my coworker pointed out, a chipped edge cuts a lot better than a rolled one.

[@LandCrow]

Holy moly, ok I’m sold on 15v

[@boristheblade12]

Damn, I definitely got to add the Spyderco shaman CPM 15V to my collection.

[@retardno002]

But that's a Manix

[@chiefsmakahoe0444]

Same

[@matthewweaver1123]

Hey Shawn. Just picked up my 15v shaman from a local knife dealer yesterday. Pulled it from the box and took it to the DMT stones. (factory edge was great, but i love my own edges). You guys really came up with something epic. I thought it was going to be a nightmare to sharpen, but honestly, it sharpens easier than s90v. And man that edge gets crispy. I almost didn't get the knife because the nay sayers claiming the extreme wear resistance won't be worth it, but once word spreads how your heat treat responds to sharpening, they will definitely change their minds. Epic 🔪

[@gaberoo9099]

Well, it takes a good deal of strength to chop that 2 x 4 with a Manix folder that's for sure.

[@chriswebb3018]

That wasn't a 2×4, that was a 1×3. Still gotta hit that shit hard to cut threw it with a pocket knife tho.

[@WhatsthePOINT_EDC]

Damn right!👊💪

[@justthetipedc7835]

I got one of those 15v manix and it’s so sweet. This blade material will make waves in the hobby for sure I hope to see more of it🤩

[@ramonade_knives]

Will make waves if it's treated properly :D I don't know if people will rush into it if it's made by someone else than Spyderco!

[@justthetipedc7835]

@@ramonade_knives that’s an excellent point 🤣🤣 I’m waiting on that 15v native 5😂 oh I wish🤤

[@ramonade_knives]

@@justthetipedc7835 should bd coming ! The N5 is my favorite folder so Im definitely waiting for that one 😁😁😅

[@lindboknifeandtool]

Can confirm I’ve cut too far and stabbed into concrete on multiple occasions and inspecting the damage with my flashlight always made me laugh.

[@FerretChloride]

Ok, I definitely need to pick one of these 15V models. I didn’t realize 😅 That’s a crazy good demonstration. Insane toughness.

[@charlie__kelly3690]

Holy moly! I had no idea I could do that with my BBB's. The manix 2 instead of the shaman no less! Thanks

[@trevordelarosa3599]

I’ve got a 15v mule team coming in tomorrow. I’m so freaking excited 😁😁😁

[@FearNoSteel]

Did it show up? How is it?

[@trevordelarosa3599]

@@FearNoSteelyes sir it did. It looks great. Very thin and I love the stone wash finish on the blade. I’ve got another one coming in on Monday hopefully that will have a set of nice scales and a sheath with it so I can carry that one and keep this one pristine lol. I want one of those manix in 15v but secondary market pricing is insane. Thank you for the awesome work you did with spyderco on this steel man I’m so excited to use this thing

[@FearNoSteel]

@trevordelarosa3599 fantastic, let me know how it performs. Thank you for the support.

[@ryanmckee6971]

Nice job on the heat treat Lynn Thompson.. Ahem.. I mean Shawn Houston!

[@jjrossitee]

So awesome dude.

[@honeymanoy]

I got these in pm2 and shaman and i can tell u it was a beast steel

[@mmllrjr]

the uniform scratch pattern i’m sure my man’s put on that freehand give me the butterfloofs

[@hobbyman47]

CPM 15V always blew my mind away on its edge retention no rolls and chips. I wish a have a gyuto made from it for a crate of butternut squash.

[@user-xf4es7eh9y]

literally any steel over low 60's hrc ain't gonna roll with how thick all the edc bro knives are behind the edge. as far as edge failure, yeah good luck with that. this is not a tough steel. light use only. smashing into wood looks cool but like most of his demos its basically designed to trick "end users" which he looks down on, which I understand, they're dumb, needy and annoying. you can slam any steel it into wood all you want. cutting boards are made of wood for a reason. it does nothing. just give a gentle little touch of that edge to something actually hard like steel or glass rim and see what occurs. your edge is toast. I see zero rational benefit of using any steel above k390 or 10v in terms of "edge retention." You will lose much needed toughness for extra edge retention when k390 already has more than enough for any use imaginable. Makes very little logical sense to me. but it is cool. and for light use. it's fine.

[@megaronknives3032]

Hey Shawn, love your videos, did you make a video on this subject, strenght vs toughness already? If not pls can you talk about that topic more in depth. I would really appreciate that good Sir.

[@jmarsh667]

Agreed more people need a good explanation of it Shaun. Most people don't realize just how important high strength is in knives. Imo more important than toughness and many other attributes. Unless your using your knife like a hammer or like to bend the blade back and forth like a re re after stabbing it deep into stuff but what is the purpose of that get a pry bar they're cheaper.

[@jaydyr]

If only we could get our hands on it...

[@CSGraves]

I hear that! :-( All the folks postin' theirs on social media, gloatin', it's salt in the wound!

[@jaydyr]

@@CSGraves why don't they just make more...

[@CSGraves]

@@jaydyr Seems to be the nature of their sprint runs. Also, I think either Shaun would have to heat treat them personally or hand over his secret recipe.

[@jaydyr]

@@CSGraves plus keeps the value up if there are limited runs... we have next to zero chance here in Australia...

[@SuperSteelSteve]

​@@jaydyrwhy do you have such a less chance in Australia? Cant yall buy from DLT, BHQ ect? Or is it different?

[@steeltoez8345]

Well that's something you don't see everyday.

[@JusttheEdge]

Damn, big man with small knife taking down trees!! I would be lucky to get though a paint stick that quick!

[@DuhYaThink]

You are a beast Shawn 🫡

[@Barryhatchet]

The most manly thing I have seen in a while

[@DEATHMETALRUST]

HOLY STUFF DUDE!!

[@sli8462]

Please tell me there will be another run with this amazing steel...

[@undertow2142]

Spyderco Manix 2 and BBB 15v is to knives what the Lamborghini Countach is to cars.

[@adoseofdrew]

Nice!

[@tmurray1972]

Toothy.🔥🔥

[@morgenholz]

Damn you, stick!!!

[@nonyobussiness3440]

That’s some dull steel man basically a hammer or baseball bat. As a purple belt I feel confident you need to get real about your steel and look what a Kantana sword is! Best when I walk around town in my gi with my katana everyone knows whose sheriff of the dojo now. Yeah man I’m a real badass. Jk That blade looks dope

[@opticwiddly5263]

🐻🐻🐻 For the win

[@fitonomberto]

I wish they would make a few more runs of this steel in pm2

[@RubricoA.]

just some lightwork with 15v steel

[@lionknives3]

What a nice wide bevel.

[@megaronknives3032]

its the 13 degress, they make it wider.

[@HellGatefr2]

@@megaronknives3032 Mine had 15-17.5° angle

[@dariocarafa3788]

Pretty neat

[@jodyrowe8166]

I need one of these omfgggggg.

[@HellGatefr2]

My Manix 2 is in the mail and has your logo on it 👀 I thought 15V was brittle, now I'm confused, greetings from France mister 🐻

[@jmarsh667]

It's not really brittle. The strength is so high especially with it at 65hrc that it overcomes any downsides.

[@HellGatefr2]

​@@jmarsh667 That is where I'm a bit confused, I thought after reading Dr Larrin Thomas that higher HRC benefits abrasion resistance but not toughness, and that going as high as possible in HRC for a specific steel only makes it less tough. I am having a hard time to differenciate STRONGNESS and TOUGHNESS, can you please give me your opinion on this ? Reading something is one thing, understanding it completely is another... Ty

[@W5rr2nG]

BUT MUH TUFFNIZ!

[@Hy-c.]

Do you know if there will be more 15v manix or pm2 made or was it a limited run?

[@FearNoSteel]

All sold and gone, you'll have to ask Spyderco to make more.

[@steverodgers8035]

Hardness? And if it's to hard it's starts acting like glass and you don't want a blade that can shatter instead of bend

[@FearNoSteel]

It's 65rc and it didn't shatter.

[@shannonandsheila1403]

​@@FearNoSteellol

[@ryansperry329]

When you started it was a fresh two by four, But when you draw back the board changes a toothpick. What gives?

[@ryanyoung3890]

Editing because KZbin short 😅

[@kermitthepog7063]

What does strength mean in this context?

[@FearNoSteel]

The edge is 13° per side We didn't have severe rolling at the edge. We could do the same thing with the tougher steel. We will see more rolling at this geometry.

[@Nudel-nc1cp]

Hey BBB silly question here: I'd like to start making knives. Are the blanks sold in knifemaking stores already annealed? Thanks.

[@Rascal77s]

Which do you have to be to chop through a 2x4 with a shaman, strong or tough?

[@Hunnisloot]

Can maxamet do some shit like this? I wanna try 😂

[@alextan2465]

May I ask why so many Italian knife companies make bushcraft knives in N690? Is it related to this strength vs toughness tradeoff?

[@FearNoSteel]

It's related to running a business and keeping good margins to keep the lights on and to keep making the knives

[@DB.KOOPER]

K390 > 15V change my mind.

[@FearNoSteel]

Nah, do you

[@kmopm777]

What makes strength?

[@FearNoSteel]

A microstructure that impedes the movements of dislocations.

[@kmopm777]

@@FearNoSteel Is that related to the steel high carbide density? I once heard being said that those carbides may work as anchors to hold the material up. One of the things i was never sure is if high carbide actually aids or hinders strength

[@CNYKnifeNut]

​@@kmopm777 Generally speaking, it hinders strength. That's just one of the many reasons why what he and Spyderco are doing is special.

[@bwunger]

Higher hardness = higher strength too. Plus microstructure and composition as BBB said.

[@wytzej8466]

You do not have much hair, for a big brown bear 😊

[@iamfuckingyourwaifuandther2743]

It's from testing the sharpness of his knives. Bald arms are a sign of a knife maker/sharpener.

[@OttoVonChriek]

If you repeat this work with a spm s30v knife, will the result be different?

[@FearNoSteel]

Higher likelyhood of rolling at the edge with this geometry, S30V has lower HRC and more RA.

[@OttoVonChriek]

@@FearNoSteel I disagree that there is more RA in cpm s30v. It depends on the austenitizing temperature, type of tempering, and use of cryo-treatment. As if cpm 15 v can't have more than 20% RA? The cpm 30v has enough hardness to not deform when chopping soft wood. This test looks spectacular, but most likely any steel with a hardness of 58-59.HRc will pass.

[@FearNoSteel]

No, review your metallurgy, there will inherently be more RA regardless due to more Cr in solution with S30V, it's why you can have similar C in solution to low Cr tool steels but lower AQ hardness. Also, geometry matters, this is at 13dps, when the steel is softer it will have less resilience and be more prone to deformation. We've been through this before.

[@OttoVonChriek]

The s30v and 15v will have about the same amount of RA when quenched to their working hardness. No one will harden 15v to the same hardness as s30v (same amount of carbon in martensite). The s30v will have less carbon in the martensite and therefore lower hardness. With 15v due to less chromium, you can dissolve more carbon in the austenite. But the RA value for all of them will be in the range of 5-15% depending on the chosen heat treatment mode

[@FearNoSteel]

Nope and nope, this is getting awkward.

[@jonathanwalker4613]

Will probably knacker the pivot point and lock up doing that

[@FearNoSteel]

Probably, but diidn't

[@iamfuckingyourwaifuandther2743]

Now do a tree

[@FearNoSteel]

Gunna need a bigger boat.

[@concealmenttraining9371]

​@@FearNoSteellol

[@ElonaldTrusk]

A ffg blade with thumb hole shouldnt be able to survive that type of abuse. Im honestly blown away by this.

[@ryanyoung3890]

That’s cause he is still using it like a knife and not a prybar. I admit a ffg with a hole in it ground thinly enough to be a proper knife will snap easily when prying, but under a load that is vertical into the edge it is an incredible strong design and you won’t break it with your bare hands while using it to cut things as shown in this video. Cheers