Wow this video is good. Well done.

Great video, both in content and in tone. I think your modesty might be preventing you from emphasizing how much of a game changer this steel is (basically the first hypereutectoid stainless to eliminate chromium carbides). Makers need to be explicitly told that this stuff escapes the toughness/hardness tradeoff parameters of the high-alloy stainless steels that they are familiar with.

"The benefit to magnacut is that it matches the toughness and wear-resistance of non-stainless steels like 4V and therefore puts us in a new category for stainless steels. It can be heat treated to higher hardness for enhanced edge stability for more acute edges, better cutting ability, and better edge retention without sacrificing toughness when compared with previous stainless steels, or kept at a more conservative hardness when raw toughness is desired." - 11:33 This is an important quote to me in this video because there is this prevailing myth going around that MagnaCut is tougher at it's maximum hardness, as if there is any steel where you get something for nothing.

There is some serious knowledge in this video, not just for MagnaCut. Thanks for putting all this information out Larrin!

I feel fortunate to be making knives when there is so much quantifiable information regarding HT for each steel. Compare our knowledge level today to what was known when "Practical Blacksmithing" was published over 100 years ago, and you will thank every Knife Steel Nerd who advanced our community knowledge base. Thank you, sir!

very good, the Magnacut I've made are at around 62.5 RC and I (and the customers) have been happy with this

What Cedric & Ada demonstrated in with the Spyderco Magnacut Mule was unbelievable. I think that's what a lot of people are going to want their EDC knives to achieve. I'm super happy with my outdoor knives in Cruwear.

Looks like S45VN is a great steel. Seems as though S30V is also a really good steel. Glad I didn’t shit can my old knives!

I'm a chemist...and I still struggled...will watch at least 2 more times...sooooo much information

I have your book and it changed a lot of misconceptions I had about HRC, tuffness and edge retention. Reading it is like drinking from a fire hose so I have reread it here and there it get it to stick in my head. It’s the kind of book I love with high information density and not a lot of fluff I would highly recommend this book to knife makers or anyone who wants to get a good grip on the steel industry and specifics on the steels available.

Holy crap it is amazing to listen to people who know in depth what they're talking about.

First, great video -Shawn

I know you like to stay objective, but it’d be the Cherry on top for you to layout at the end applications for different HRC’s. Example: For a moderate use folding knife X heat treatment + geometry I think would be ideal because ____. I realize you’re a metallurgist not a blade smith, but as someone who is neither, that’s something I’d enjoy. Great video, can’t wait to get some Magnacut in my hands

thank you Larrin. Great video

Would love to hear your take on 1. the factors going into a knife with the longest lasting fine edge, and 2. an explanation of what underlies the bitey, sticky, crisp, or whatever term you choose edge that is spoken of often..

Thank you for breaking this all down in an easy to understand way.

Watching this video several times and taking lots of notes

Awesome! Thank you for providing quality free knowledge 🙏

Such a valuable source ok knowledge for everyone! Thanks a lot for your work!

Man, my nerdy brain was massaged with so much technical information. I love this and getting a little more understanding, even if I’m don’t make or work with a knives.

Thanks for the awesome video on this subject, especially the relationship between edge geometry and hardness

Love the video!! What you did with the edge impact test is what I was attempting to do on the forum a while back. Thanks for the knowledge.

Thank you for the video! You’re doing your best to keep all the miss information at bay, and you are the best man for the job! This video is packed with tons of info, I’ll definitely be watching this video more than once.

Larrin, you're the man! You make this stuff easy to understand, & you give a lot of info in a short time. Thanks so much for everything you do!

Great video Larrin. I especially appreciated the video of austenite forming martensite. Excellent visual!

Thank you Larrin. This video is amazing

I love how entertaining this is as well as being very informative. Thanks for all the data collecting and excellent articulation during the narration.

I had been waiting for a response like this after seeing several posts and videos on the matter. Thanks for dropping the education and dispelling the myths.

Epic video Larrin. Appreciate all your contributions to the knife-maker community.

Not just great info, but well put in a way I can absorb. Thanks so much

always very very interesting to see the results of your research larrin

Thank you very much Larrin. Excellent video that goes well past 'Best hardness for MagnaCut'.

Love this video and love this channel! So much easier to understand the science of all things blade steel when its video form and the metalurgist is laying it all out for us

Thanks for taking the time to put this video up great amount of information I kind of had it figured that most production company's were going to be in that 60 to 62hrc for the toughness aspect and only in customs were you going to have that 63 to 65hrc and at a thinner geometry that I personally tend to like but that is preference as you mentioned. Thank you again for the video tremendous amount of helpful information.

As an amateur/hobbyist knife-maker, I love your videos man. Thank you!

Thank you for the hard work put into this video. New subscriber!

Excellent overview not just of Magnacut but it's general considerations for most steels.

This video was awesome you always do such a great job explaining everything that in such detail. I will definitely be sharing this video 👌

Thank you for such a helpful video even for a non knife maker.

Great video can’t wait to get my hands on a magnacut knife!

Another great video mate ,thank you

Saved video for future reference. Very well done

It always amazes me how some people who just don't know; well , you just can't tell 'em.... Even if you developed the steel and have tested it extensively... and have the best of interest in the success of it. Truly remarkable.

What you said at the end of the video is key. I first thought to myself when I saw that White River had a special run of the M1 knife in Magnacut at 59-60 Rockwell, that that's way too low! They aren't anywhere near the wear resistance/toughness sweet points for this steel. Then I watched this video and it is what you say, as long as they have taken the proper steps during heat treat, it should end up being a tough and (truly) stainless steel.

YAHOOOO WE HAVE BEEN WAITING FOR THIS!!!

Such great information. I love learning this stuff. My dad was a metallurgist, so I feel my like for this field is in my blood not to mention I worked in engineering most of my life. The only thing I'd alter in producing at least this video is, your voice sound level is competing with your background music sound level and the music sound level is distracting attention to what you're saying. Speaking as a school teacher with a BS in education, I'd either lower the music sound level or get rid of it.

Excellent video! I learned a lot thanks!

Thanks for the great video and information about MagnaCut.

the retained austenite part might be why I find my 20cv knife relatively normal to sharpen rather than difficult, maybe it was just a good heat treatment

I'm excited to say I recently picked up a white River fc3.5 in Magnacut. It's at a 61-62 RC, and I'm eager to put it to work. So far, I'm impressed with it. I've profiled it to 18.5 degrees per side.

Thank you for providing sources 🗡

Very informative and interesting. Also a good explanation on why most companies prefer lower hc #'s even if they are doing a quality ht.

Old habits die hard in every industry. When I worked in the automotive industry I talked to so many guys who thought that newer oils like 0w-20 or 0w-16 oil were too thin for any car and couldn't be trusted even when it was the specified oil for a given car.

Thanks for the awesome info! Well said! 👊🏼

This video is amazing. It explains a lot of complex ideas (to me the noob at least) in an easy to understand way. Great usage of visuals to support the data as well. Thanks!

This video was very informative. Thank you. 😊

Thank you once again for a very informative video 🤟

That was extremely informative, thank you !

amazing content, lots to digets here, there are so many confounding factors

Greatly informative video on the complexities of blade steels and the many (MANY) variables that affect performance. Thank you for sharing your wisdom. 🙏

A lot of great information!!! As with everything,,, it's always a balance!

AEB-L looks great on the HRC + toughness graph at 60-61 hrc. Makes sense my local forge uses it so much for kitchen knives

Fascinating. Thank you!

What a great time to be a pocket knife enthusiast! You’ve tipped the scales with Magnacut. Nothing else will ever do until Magnacut 2! My Sebenza Small 31 and my Pro Tech Runt 5 are both Magnacut! Thanks for your work!

with the megapixel Wars it was/is worse than just optics. smart phone camera sensors they often just blow up the outputted scan; like upscaling a smaller photo in photoshop, [or hardening steels to the detriment of toughness]. So your comparison between cameras and HRC is brilliant. lol

I was on the fence about getting the launch 15 because almost everyone that talked about it ultimately criticized the 60-62 hrc as a deal breaker and I was partly dissuaded because of this but hearing this info from the man himself puts me at ease

Fascinating stuff, thank you

I have a bark river knife in MagnaCut, i have no complaints, good steel, easy to sharpen and the carbides hold well.

For people who have no time to watch the whole video, skip to 29:38 for the summary 😀

Great video! The only thing it lacks is a bit of historical perspective that shows just how extraordinary these new steels are. It was only a decade or two ago if you wanted toughness, you had to deal with rust, and 62 hardness for production knife blades was only possible with high-speed steels. Now, we have a slew of incredibly balanced performance steels that offer what used to be the ultimate in every performance parameter. Now we have a steel that provides 63-64 edge wear in its "SWEET SPOT" for toughness, AND its stainless! You have to have loved a knife made of 52100 or 440C, to really appreciate these new steels. They are incredible.

Another great, informative video. Thank you. Now I just need to come up with a couple designs for this bar of Magnacut in my drawer. Hmmm. 🤔

Really excellent video!

One of the best informative knife vids out there. Well done Mr. Thomas. This is a great summary of parts of your book. I gave sharpening and knife info lessons yesterday and this would came in handy to explain a lot of the topics I talked about. I work for J.A. Henckels and would love to bring this info into the laboratory in Solingen.

I have a magnacut outdoor blade at 62.5-63 hrc and a chef knife at 63-64 both perform very very good. Couldnt be more happy with magnacut especially when seeing how thin i can take the edge. My chef knife is 5-8 per side to 10-16 inclusive and has not had any problems at all. My outdoor is around 15 per side and has not has any problems either

Great video with some outstanding information! I learned a ton!⚡️🎩🇺🇸

Really useful, informative video. Thank you. One suggestion: the serious, edgy jazz in the background makes it significantly more difficult to concentrate on your words, especially when things get technical.

I love your explanation. Magnacut has been a great steel so far - tested on a lionsteel M4 with regrind. Also dig your taste in music - grim fandango ost ftw!

Excellent video! I came for the cutting edge (pun intended) knife knowledge but stayed for the jazz😁

Great video !

U are a TRUE genius in this field of metallurgy... thank you for all u do... but most of all thank you for making it available to the public

Very nice of you to take time to talk about the subject. I find the So called supersteels in certain tasks useful, they are good to have if skinning game for example or cutting meat large amounts. Still far north the climate is unfortunately during harsh Winter - 22 to - 58 Fahrenheit. - 30 to-50'Celsius cold. The toughness and strenght of the blade is more relevant in extreme cold conditions because the blade become brittle and snaps easily if the steel is not able to bend and withstand blows while chopping wood with a Leuku. The construction of a puukko differs also from a full Skeleton fulltang knife which is something to keep in mind. You dont want to Touch metal when the Temperature drops to minus 30' - 50 Celsius. The skin sticks to the metal and rips youre skin off youre Fingers and the palm of youre hand. The wooden Cover also insulates the long Tang inside the handle. If the puukko is made with old traditional methods, the whole Tang goes through the handle All the way. Its pretty useless to try to explain how its done and I havent talked to anyone who knows that there are others besides me who does it the long and very time consuming way to it by hand. When its done properly I keep them all myself usually, sometimes I give one for Christmas as a present for my family and dear close friends. The whole process takes 3-5 months. Selling any of my fulltang puukkos has not crosses my mind. Its just too much work for to be Sold. So I choose very carefully the knife steel because the all materials are the best there is and I dont spare any expences ever. What I do worry is that if I would use some New supersteel it would be a skinning knife or puukko. If I make a puukko for General use it has to actually work in all weather conditions hot or cold or moist. The usual steels are tougher steels like Aeb-L, 80crv2, 14% chromium steels, now I have been considering making a puukko from 15n20 steel. If the conditions are extreme cold its not an option to choose supersteels that have not been tested in real life situations for atleast 6 months preferably a year. Just the time used in making a proper puukko takes so long that local puukko Masters dont choose to use new steels because the older basic steels have a long succesful rate for surviving in dead cold conditions without breaking, decades. I kinda am interested if the So called supersteels have any Chance of performing better? The thought that Magnacut or Elmax would be better is naturally been laughed at by national knife makers. I understand the sceptism, but I if Magnacut puukkos are never tested during Winter time, no one really knows, does the blade survive or not? It would need to survive winter Batoning firewood and skinning large game, opening cans, making fire, food prepping, wood work. I have been thinking that this would be a real life science project, I have been trying to find a Magnacut blade with a fishtail Tang without succes. I wonder if there would be a possibility even in theory that Magnacut would survive a winter test if heattreated 59-60 hrc and made a blade suitable for a leuku, fishtang as long as 13-15cm with a 180mm cutting edge if the thickness would be 3,5 to 4,2 mm? And 40 - 47mm tall blade? It would be quite fun to prove wrong the traditional puukko artesans. I wonder if there would be suitable Magnacut blade for this project?

Very good video! Have you already checked out what UG-tools did with your steel? Also very innovative

Great video 🤘

Great info man

Perfect. Thank you

For some reason KZfaq likes to auto play this video for me and every time I end up watching or listening to it all the way through. That said, each time I pick up something new that I missed before. I know the videos are a lot of work for you but man Larrin they are valuable either as a stand alone or more so when paired with all your other work on the site! Furthermore, I’m really enjoying the new book!

Thanks for the video, Larrin. What excited me about Magnacut in the first place was that it seemingly could function as a stainless replacement for 4V/Cru-Wear-type steels. I'm sure Magnacut at lower hardnesses isn't bad, but I'm not very interested in it at 60/61 HRC and wouldn't want 4V/Cru-Wear at that hardness either.

Crucible Industries cuts blanks for knife makers and they do the heat treat too. So much of the semi custom market has perfect heat treating in these boutique steels. Bark river comes to mind.

Thank you

Could you do a video on cruwear/Z-Wear heat treament and ideal hardness ect.

Hi Larrin. Question about Magnacut heat treat warping. There seems to be a huge amount of warping with Magnacut heat treat as experienced by Gary Creely and other knife makers. Do you think there is something specific in Magnacut causing this, or perhaps heat treat companies making mistakes or just having teething problems getting used to Magnacut? Second question, what are your thoughts about using a carbide peen hammer to straighten hardened and warped Magnacut at room temperature. Surely there would be a good chance of causing micro cracking? Thanks for your videos. Always great info.

While experience is valuable, it doesn't take long before you realise that just because someone sounds convincing, they might not actually understand why what they are saying is wrong. Meaning, I very much appreciate your evidence based approach to these subjects. I find the data itself as interesting as its application to actually making knives. Cheers mate

Thank You.

Fantastic information! So much better than the bro science I'm used to 😆

Question about heat treatment for magnacut, should I grind my primary bevel before or after sending out to a heat treating service like peter’s heat treat?

Very good. Thanks

Hey, can you make a review of PM-V11 steel for cutting wood?

If you were in the Roman Legion c200AD, which steel would you choose for your short sword, and at what hardness would you heat treat?

Great video 👍

Great Vid , Thanks Brother ! Juhvon sent me over !