The Power of K390: Steel Test Fine and Coarse Edge

cedric-ada-sto...
Good gravy its bricky on things
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[@FFPM365]

You have become hands down my most favorite KZbin channel. I appreciate how you are not just an obsessive knife nerd only, but also funny and have a sick yard with chickens and cool dogs. And you talk to a brick….like what’s not to enjoy?? Keep up the legit videos. Always fun.

[@TrustNoOne88]

The brick was genius if you ask me. Go high functioning autistics!

[@tombrown4683]

Couldn't agree more.

[@KnifeNinjaEDC]

For people wondering, that 1000 grit finish is off of a TSProf diamond stone and it’s measured in FEPA. So F1000 which is equivalent to 4,500 grit. Don’t assume you can get a mirror polish off of regular 1000 grit

[@jamesgosling4303]

I was wondering…Thanks!!! How does the KME grit rating compare (hard to get what grit rating companies use sometimes)

[@mcsquirgle]

I feel like we should make sure that Pete knows this. the F400 FEPA stone on the TSProf he used for the Endela is more equivalent to about 1077 grit in Imperial. even the F150 Stone is worth about 227 grit American

[@bazzzker]

Also 6000 chineese grit

[@EdgeStoneKnives]

@@mcsquirgle I've tried commenting in his other videos. Not sure what else to do. It's pretty damn important though.

[@EdgeStoneKnives]

@@jamesgosling4303 KME is just regular grit.

[@Rhubarb2]

"I talk to a brick for fucks sake" That's why we come.

[@realbroggo]

I'm still laughing at that comment 🤣

[@danielcluley870]

I LOVE LOVE LOVE K390. And here's my stupid reason why. I am not afraid to USE and ABUSE it! SO many other steels/knives do not feel like real working steels for me. This stains, it gets used, it is so hard it takes it and holds the edge, so you use it more. It gets that patina and it gets appreciated. I am a giant K390 fan for actual real use knives over premium knives I am scared to bring out to do a job. Great stuff.

[@RyanHall_]

“Look at this place. I’m talking a brick for f*cks sake.” 😂 I died.

[@lowowl]

Proving that your role on the knife tubes is surely not in question. Simultaneously leading the community of brick communications and twisted sisal sacrifice. I know no other who is outstanding in their field, as the rest are indoors. Thank you.

[@archivist17]

Not sure Pete's out standing in his field; it's more of a smallholding.

[@michaell397]

Hi guy! Thought I would give you a tip. You mentioned that your D-2 knives were rusting. I made knives as a Custom Maker for over 47 years, and have used a lot of other makers D-2 knives. I have never, so much as once had a Real D-2 knife rust. Ever! I have cleaned countless heads of game with D-2 knives from several makers. All high hardness, all well finished. Some of the top makers out there over the years. Jimmy Lile. Bob Dozer, George Herron, and mine as well. All held an edge considerably better than any I've seen yot test in the steel. At 63+ it really shines! Yet I've tested a lot of Chinese D-2 knives and all but one we very non-impressive. Now were much better than 440-B or AUS-8 which are both terrible edgeholders I notice that you keep your knives in a plastic divided container. You see, plastic causes moisture to concentrate and a much higher rate, particularly in a humid environment that say a dry wood, or cardboard. It may very well be the container (tray you are keeping your knives in. For those that do not know, also keeping your knives in a leather sheath or pouch can cause all kinds of damage. Leather is tanned using varying taningacids and these acids attack metal. Again, it is much worse in humid environments. Very much enjoy your efforts in testing. Fine Work!!! KnifeMaker/Retired

[@craigcarroll6161]

So maybe someone is not actually using D-2 but saying they do. That would come as no surprise considering where so many knives are coming from.

[@michaell397]

@@craigcarroll6161 Sadly ,there is a lot of supposed d2 that is not. Usually one of the low cost 8 series of stainless.

[@petergrams6390]

Every one of you videos lately has either been super informative or made me laugh really hard. Or both. Thank you

[@nandayane]

Have to say that seki K390 is great stuff! Pretty easy to sharpen, holds an edge a long time, resistant to major damage when I do stupid shit with it. Glad to see some repeat testing against M390 / 20CV! Cheers! Although what I walk away with is also being really impressed with Magna-Cut as well.

[@jenkinsmig]

Cheers Pete I knew I loved my k390 it's just nice to have confermation, tested results. Even if your going to be off again with rsi... Over 3000 cuts of twisted sisal rope, your wrist must be killing. Cheers for the sacrifice.

[@americangraffiti6192]

After watching the Magnacut and now this one on some K390 love. I was about half expecting to hear some Rocky ( Gonna fly now ) tunes playing while you were mixing it up your own rope-a-dope magic. Thank you from Ohio!

[@Alex25CoB]

I totally love your recent videos and I'm glad, that your back to the knife game 🤪 Fine vs coarse grit edges are super interesting to me, because they reflect real world use so well!

[@RubricoA.]

Good thing I grab the second hand Endela in K390 around 82 USD (converted). It can grab a hair even at lower grit which is really amazing

[@Cracktower1]

NGL, I bought a Stretch 2 (K390) because of your video you did with the Endela in K390. Thank you for all you do, I know it can be monotonous, but you do make a difference.

[@bigaspaulo]

Mmmm, that was some quality faf! You need to get HomeSlice to put a dual grit edge on K390 and see if it rivals MagnaCut!

[@the_knights_edge]

Don't ever say that you just "cut the rope"! Your spreadsheets and videos are amazing and have helped me very much!

[@tombrown4683]

Glad to see this. Only have one in K390 but was in Golden Co. visiting relatives & saw it in the case at Spyderco HQ. Just couldn't resist it.

[@bohonea1602]

From one fellow knife nut to another, I greatly appreciate all the testing you do!!! Thanks !!

[@jkanecutlery]

K390 is great! The Dragonfly 2 in this steel is my go-to low profile folder. I’m a big fan of tool steels. They have enough free chromium for decent corrosion resistance and feel crisper on the stones than stainless steels. Usually tougher too.

[@cordobadebear]

I got my endura k390 blue a year ago and so far I’ve only had to strop it few times…

[@christianmcbride9905]

Thanks for the vid, it helped me decide to pull the trigger and get me some K390. Which i absolutely love by the way, so thanks a ton :)

[@theghost7112]

“I talk to a brick for fuck sakes.” That was hilarious 😂😂😂. You are the standard. Keep up the good work.

[@kevinfitz3721]

I think a video on non diamond or cbn abrasive on k390 vs diamond abrasive would be a cool video but loved this video thanks for the content

[@jeremynedrow7003]

I love k390 and Maxamet.I don't need anything with better edge retention I'm happy with both.

[@the_swinging_axe]

Thanks for another video man! Very enjoyable and useful content. Way to take one for the team!

[@frankbennett3075]

Bricky got it right, and so did you, putting yourself threw all this grueling cutting so we don’t have to, thanks.

[@MrProctitus]

Thanks for another great video. When I hit search on KZbin, Cedric and Ada is always top of the pre populated list. Love your content. So you’ve explored K390 performance variation with edge finish as applied to rope. Is it too much to hope for a repeat test but on onions? If time is a constraint then you might limit testing to the Endela, your primary onion knife. I’d be comfortable with extrapolating the results to other knives and other vegetables.

[@awwwshucks443]

Now I'm excited about the k390 enuff 2 I pre-ordered even more :-)

[@JohannSwart_JWS]

K390 is one of my favourite steels. Takes and holds a crazy edge, with no chipping. Even after some wear, its still kinda toothy.

[@franka9760]

Thanks again, Pete, for another great cut test. I've got an Endela in K390 on order. You and Erica with notyouraverageEDC convinced me. I'm sending good vibes for your hands to heal up fast!

[@Minusroot8]

Pete you’re a BEAST!

[@gizmocarr3093]

I respect seeing honesty, sharpness testing requires a set standard, and I understand sticking to your testing method. The higher polished edge will better resist corrosion and the buildup of sticky materials. Cutting rope is your testing standard, too late in the game to change now.

[@lindboknifeandtool]

It just feels super fine, super stable, and overall really forgiving. Try a wharncliffe example, my delica is sick.

[@Loleyke]

ordered one, can't wait to get it

[@athomeintheoutdoors7411]

Your local hardware store must be like “here comes the rope guy again”😂

[@seanleipziger9167]

Hey Pete would u believe I was just wondering what I was gunna watch and my mind was like I just want something relaxing like cedric and ada and poof u were the 1st video the algorithm sent when i opened up youtube. 👍👍👍 love your content man

[@unknownriderinbound]

Self- diagnosis is a great thing. Brick diagnosis is transcendental.

[@Nkdc333]

We appreciate you sacrificing your body for cut tests.

[@mistersmith3986]

Bricky is the smartest guy on your property mate!!!

[@MLKusername]

Easily the best knife channel

[@Mike-kr9ys]

Interesting result! Thanks for sharing that with us.

[@christianmcbride9905]

I've just started watching your videos (3 so far) and I dig em, love how you put your knives through the wringer to see what they can do. I too enjoy a good K390 and you've somewhat relieved my fears that my knives in that steel aren't gonna rust out on me lol, patina I like, rust not so much. Anyways thanks for the content and please keep cutting shit. 🔪

[@DrJuice1]

Bonus dogs! Nice

[@sharpends4279]

You're on a tear and I love it! I've never gotten anything in K390. At this point I doubt I will, but it seems nice.

[@krustysurfer]

And Its why we understand relate and love ya Pete😉🤙💯

[@kittrainbow7]

Cool steel to test 👍

[@mr.crumbles2557]

Bricky has no chill at all 💀

[@umakako]

I like the exotic composition of K390

[@michaelm5203]

Loving the videos as usual. I’d watch just about anything you post. Paint drying? Sign me up!

[@SpareSpacesuit]

Couldn’t agree more with the handle/ergonomics argument

[@txokoil]

Maybe what cuts paper the best is a microserrated edge. If a toothier edge retains microserrations longer than a mirror edge, you will end up with the result shown in the video.

[@Greg_M308]

Good stuff.

[@mikececconi2677]

Man, that brick don't pull no punches, do it?

[@BlackPearl-bp]

Now I wonder if one if those knives has a dual edge similar to that previous Magnacut video would that boost that 1000 cuts to a similar number to magnacut or not ?

[@servantofyeshua2313]

You are the best thank you.

[@matrix5175]

Ever tried k390 at 15 degrees per side or even less? Around 15 seems to be about the limit for k390 in my testing with dropping my angle much lower than that significantly reduced the edge retention. But I hand sharpen all my edges and don’t measure the angle exactly so these numbers for me are educated guesses. I always try to sharpen all my knives to produce the highest edge retention and slicing ease without worrying about how the edge looks so my edges are almost always 10-15 degrees per side depending on the steel. K390 is one of the only few I’ve not had good results with taking it lower than around 15 per side.

[@heavyweightsound]

Fantastic! Thanks for the tip! Been trying to get my sweatpants to stay up on my waist for years and they keep slipping down

[@EDCandLace]

I really love seki k390 at jis800, or F240.

[@jaymclane4814]

Endela or stretch in terms of ergonomics? Love the channel! Cheers!

[@Davidmoore-xy6wu]

Look at this place , I’m talking to a brick for **** sake 😂

[@Freakmaster480]

Have you tested any vanadis 8. Was glancing around at chemistry and the knife steel nerds charts. Looks like it should perform like a tougher k390.

[@Tyler-Woody]

Ayyyyyyyy. 😂I'm about to get evaluated for high functioning autism.

[@freestatefellow]

Pete, what's the backing track for the cut test? I assume it's from a JRPG, but I can't find it. Help a guy out?

[@DuhYaThink]

Bricky is quite intelligent 😂

[@ergezinger]

Why was Knife Edge Theory 101 not an option at my local University?

[@pop4803]

Thanks, if I could get a spyderco in k390 might not have to sharpen again seeing I'm 70. Lol

[@stevecrawford7814]

I’m 71 had to sharpen my Police, my favorite knife.

[@pop4803]

@@stevecrawford7814 you did quite a bit of cutting.

[@toby8503]

please cut test the spyderco enuff 2 in k390

[@jacknemo8021]

While LC200N is my favorite K390 is a close second.

[@coleroyce]

I think I want to vinegar finish my k390 stretch and dragonfly. Should I just soak the blade, disassemble from the knife handle or does leaving it together open do well enough?

[@StoneHands25]

Does k390 ever get a finicky burr like m4? I've always had them with m4 and have heard others say it also. Thanks!

[@PhyllisLiao]

Another one 🎉

[@Grayson_Baker]

What do you do with the rope cuttings?

[@514MCMontreal]

Epic Bricky!😂

[@micarta]

Well now I want to play more fire emblem!

[@OmegaCaldereroid]

K390 vs M390? who are much bestestest??? 🤔🤔🤔

[@Yarramen-Yaro]

Is that a 17 degree angle on the toothy edge as well?

[@CedricAda]

yep, same angle on all, on the toothy i just stopped at 400

[@0rin]

I'm thinking about getting Lionsteel T6 and it comes in two steels, K390 or CPM-3V. Which steel do you think is better?

[@CedricAda]

still probably 3v for a bigger knife like that with a thicc lionsteel edge. The k390 would be a little wasted on a chonky blade, works best on racecar knives like the Police 4 IMO 😀

[@_brianm]

2 mins in I’m rooting for the Endela.

[@ViktorKitov]

Hey Pete, Any reason you don't use gloves? Should help at least a little bit.

[@buffalojones341]

Yes please

[@davidcooke8825]

My stones needed replacing years ago but by the time I realised it, I no longer cared

[@davidgray4138]

Bricky would likely have something to say for our love of high end non-stainless steels… something along the lines of imparting a fraction of our minuscule human existence onto an item in an attempt to convince ourselves that we are truly unique…

[@sergeb.1717]

So same police 4 that did only 242 cuts before... ? Other test same knife 3 hundred something , then you got a test that yielded 5 hundred...

[@c62west]

Another great steel test! Thank you, Sir. (WHAT are you hiding behind the green screen? Could it be lovely farm fowl or potato posters? If it's just a lawnmower, don't bother showing us. Could it be a bunch of Bricky's friends? A chorus, like in an ancient Greek play, at the ready, to enhance our experience?)

[@briceconway7443]

👍

[@13irishsailors]

I dont know why but I can't stand stainless steel right now. Given I don't live in a humid area but I really enjoy a patina on a knife blade. It bums me out when my knives stay shiny after months of use.

[@DamionJR4923]

My hands would not be able to do what you do

[@starkparker16]

Did the discussion of patinas spark a trend, as in fancy-boy selvedge circles, of intentionally developed patinas and fades of blades? Only time will tell.

[@masalpert]

That's not just a brick. That's Bricky.

[@armandoo.2551]

3 knives with K390 all one after the other...damn. This video should have been titled return of the king, but Bricky would have gone a bit meaner if he’d caught wind of it probably.

[@SpankyK]

The things Pete does just to give us "real world results" are crazy. Thanks Pete!

[@ryanvalicek7291]

You are slaying it with content lately!

[@SpartanJohns]

Interesting test! I have one question: Could you tell me the thicknesses behind the edges? That might explain why(if the HT is the same) the Stretch outcut the Police. And it would be interesting to know in general. My guess is the Stretch is thinner behind the 17 dps edge. I also have the Stretch 2 and I have to admit that I like K390, so far, more than M4, hen it comes to how it holds its edge and how it can be stropped back. If I would have to pick a sssteel for a knife like the Stretch or Endura, a work/test knife...it would be k390. Especially if it is ground thinner behind the edge. Good video!

[@jesseadams45]

K390 is definitely my favorite steel. I have gotten some of my best edges with it.

[@slick_slicers]

I’m quite a fan of K390 too. I’ve only a couple, but I’m very likely to get more.

[@Freakmaster480]

It good to see you sitting up higher now. I recently rewatched some older videos where you are basically level with the table and I can't imagine how much worse that was on your shoulder.

[@adoseofdrew]

I’m talking to a brick for f*cks sake. 😂😂😂

[@robbbbery]

I don't know about anyone else but I had to turn the volume up to hear the talking, and then I got absolutely sonic blasted by the music :( Great content, though, I love watching these experiments!

[@MrJihadkoplo]

what the music when u cutting?

[@realbroggo]

It's becoming more of a human endurance test than an edge retention test!! K390 is a great steel and I think you're right in that it tolerates some edge variability better than most premium steels. Great vid. Sharp blades all.

[@petric334]

Use of a green screen as a...green colored screen - this is ground breaking. Glad to see you back :) I appreciate you man.