I’ve looked for information about this and can’t find anything. Notify me of follow-up comments by email. Therefore, super hard high speed steels could be developed with powder metallurgy technology which also utilized increased vanadium content for a combination of both high hardness and high wear resistance. *while using a broken knife blade to lever open a tin* hmm, debatable , I Like your articles, what a novel idea using data and You HAVE to understand Maxamet steel and it's characteristics before going and using your new expensive Maxamet blade to cut 200lb zip ties off of a steel pole.  Hamaker, Jr John C., James R. Handyside, and Daniel H. Yates. However, Rex 121 is at an even higher level of insanity in terms of wear resistance and would be expected to be another notch higher. It really isn’t, as Maxamet is a high speed steel designed to be a carbide replacement for better toughness but retaining much of the hot hardness, and is not stainless. I even used gradients for my bars. Maxamet is a complex steel alloy with excellent edge retention and toughness (non-stainless). Never used, let alone tested, put in print, so someone These can include replacement machinery parts, toys, hinges, or outdoor signs. 66% Score of Average of Top 5: 251; closest steel is CTS-XHP at 242 I’m not sure why M390 has such a good reputation for toughness. Great article Larrin! AUS-8 gets a toughness rating of “4” where 8Cr13MoV gets a “3” despite the two being similar steels. Typically low hardenability steels are best for differential heat treatments because the edge can be quenched so it is hard while the spine is left to air cool to be soft. Here are links to learn about a few of them: Edge Retention of Knife Steels Part 1 and Part 2. He has some very pretty charts summarizing the ratings of all of the steels, which I have reproduced below: If you compare the ratings above with those from the Knife Informer ratings you will notice that they are nearly identical. I have been enjoying your website for a couple months now (since the KnifeNews article), and I appreciate the depth and detail in your articles. I have rated their articles based on my own experiences, steel datasheets, and how I feel this morning. I’m not sure that has much to do with wear resistance. They achieved the high hardness by combining high carbon content with high cobalt additions. This blade steel exhibits good toughness, but it does not meet the level of M390. - … However, that's still lower than Crucible CPM REX 121 steel and many other alloys with comparable performance. Steel is really the essence of the blade and primarily responsible for how the knife performs.” I think edge geometry and design is primarily responsible for how the knife performs not the steel, but maybe Matt is using hyperbole since this particular article is on steel. It’s possible. Shop By Steel Type; Maxamet; Sort by: Maxamet. Toughness testing by Knife Steel Nerds used steel heat treated by Warren Krywko and myself, and machined by Alpha Knife Supply and Mike Pierce. Maxamet is made by Carpenter Technology, a company best known among steel snobs for its CTS-XHP, which made appearances on the Spyderco Techno, Slysz Bowie, and Chaparral among others. Even with a fine microstructure from powder metallurgy, toughness is inherently low in the 68-72 Rc range. Notify me of follow-up comments by email. I don’t want to have ratings with no accompanying explanation for how the scores were determined. Too much toughness can lead to a blade easily warped.”. Those more recent carbide replacement steels combine high vanadium (5% or greater) along with high hardness (>69 Rc) for very high strength and wear resistance. He at least mentions the effect of edge geometry. I don’t like reducing things down to a single numerical rating when some properties are more complex. They have the appearance of providing useful information but really doesn’t tell a consumer very much. Perhaps it would be good to mention what type of cutting he means when he says that the blade may not “stay sharp.”, “Wear Resistance – How long the blade remains usable and resists chipping and other abrasions.”. Maxamet steel version of the Manix 2 with gray FRCP handle. He says that manganese “[i]ncreases. The limit of hardness obtainable from heat treating of the existing grades was about 67-68 Rc, but there was a desire for even higher hardness for cutting of difficult materials. Just doing it see we can all learn. I previously wrote about the effects of cobalt in this article. So I did a couple google searches, opened all of the articles in the first 2 or 3 pages, and kept each that had ratings for blade steels. And here is an article where I took micrographs of 42 knife steels which has the most up-to-date toughness charts developed for this website. Erroneous “OPINIONS “ on a knife steel they have  Nehrenberg, Alvin E., Thoni V. Philip, and Steven Gary. He doesn’t list the effect of different elements (yay!) If lower hardness is desired, it would be better to use a steel like CPM-M4 or CPM-T15 since they have higher toughness at lower hardness values. I haven’t provided a link to his article because I don’t think anyone should read it. That, in combination with the relatively low vanadium content, is probably why M42 has relatively good toughness. However, the high vanadium additions (>1%) in many knife steels are made for wear resistance and that is not explained in the article.  Gill, James P. “Alloy steel tool.” U.S. Patent No. That seems like enough examples of poor ratings of steel. The most obvious strange thing in the ratings is that 420HC is listed as having better corrosion resistance than 420 for some reason: This article has a much less pretentious title and was written by Dan Jackson. CPM-S110V exhibits many of the same qualities as S90V.  Automotive Industries 105 (1951): 158. 33% Score of Average of Top 5: 126; closest steel is 154CM at 124. Cutting performance, toughness and edge retention are off the charts. But the # 9 of company A was different thickness than #9 of company B !! Hover over an element to learn more about how it affects steel performance characteristics. Bohler Uddeholm M390 Bohler M390 is widely revered as being the best all-around knife steel, which has led top companies to widely utilize it in higher end knives. This expression of the Para 3 combines all the defining qualities of this best-in-class folding knife design with the extreme edge retention and toughness of Maxamet blade steel.  Mackay, William BF, and Robert O. Carson. I would say if it’s not broken it remains usable. Maxamet’s distinguishing metallurgical characteristic is the high carbon content (2.15%) and the inclusion of 10% Tungsten. While 10% Tungsten(W) may seem a lot, but in reality it isn't, because Tungsten atoms are so heavy, in other words, very heavy elements like Tungsten, produce fewer atoms to form carbides. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! 1 year ago. Perhaps in the future Si will be explored more. Maxamet is a high carbide volume steel, ~22% Les aciers les plus populaires de cette catégorie sont les suivants : CPM S35VN, VG10, CPM S30V, Böhler M390, Böhler N690 et bien plus. Powder metallurgy steel was first produced on a commercial scale by Crucible Steel at the end of 1970.  De Vries, Ralph P. “High speed tool.” U.S. Patent 2,212,227, issued August 20, 1940. Disadvantages: Can be relatively difficult to sharpen (compared to carbon steels and softer stainless steels).  Kasak, A., and E. J. Dulis. The ratings above are perhaps the best of those analyzed so far though he was helped by the fact that he did not rate toughness; that is a “tough” one to rate using commonly available information. While I always appreciate someone confusing the experts with the facts, you have left me with a void to fill…. I would personally be more careful before calling any of my articles the “ultimate” anything but I suppose we can give him the benefit of the doubt and say that the title is for clickbait purposes and not necessarily how he feels about his own steel knowledge. Even where I criticize the articles that does not necessarily mean that I think the author is clueless, or that none of the articles are worth reading, or that they don’t regularly call their mothers like good boys should. He defines wear resistance in terms of both abrasive wear and adhesive wear but it’s not clear to me how that is useful to the novice that needs an article to introduce different topics. This article is written by someone known only as “Huston” and he is quite confident in his article if the title is any indication. Proven design, amazing steel 12/09/2017 By Seth Lord Always been a satisfied user of the Para 2 lineup, and this is now my favorite. The addition of large amounts of tungsten led to “secondary hardening” in tempering meaning that the hardness increased at high tempering temperatures, around 900-1100°F (480-650°C) rather than the typical softening. I don’t have a full article comparing the toughness of different steels to each other. He next lists the effect of different elements which as I explained above I’m not a big fan of. Lower hardness and lower wear resistance than all of them. However, the toughness of cemented carbide is very low and the cost is high. With 13% Tungsten, Maxamet’s chemical composition is very unusual. “Low alloy steel having high hardness at elevated temperatures.” U.S. Patent 2,996,376, issued August 15, 1961. S30V is given the lowest rating for toughness, which seems like a stretch. To normalize the numbers to what's readily available on the market, I averaged the top five steels (average is 381) and ran the numbers again. But before we get to what exactly these steels are and how they work, it makes sense to look at what led to their development first. 11 Jan. 1938. 27:51 . This steel was eventually called ASP2060 by Erasteel and Vanadis 60 by Uddeholm. 6 (1988): 477-479. I also like that he doesn’t define the effect of different elements on steel but he does link to a page that does so, so hopefully no one clicks on that. Thanks to Stacy Apelt for becoming a Knife Steel Nerds Patreon supporter! So the ratings that are generated by those writing these articles are basing them on their own experience, the reputation of each steel, what limited information is available from the steel manufacturers, and how they feel that morning. 440A gets a very average corrosion resistance rating of 5.5 despite its very good corrosion resistance. I am relatively frequently relieved that I remembered to not bring a knife with me every time I visit an airport or a theme park with metal detectors. Required fields are marked *. Tool steel grades used in cutlery : A, D, O, M, T, S, L, W. See also AISI Tool Steel Grades. Steels with even higher vanadium as well as a cobalt addition for higher hardness became T15 and M15. 2,174,281. 281,386, March 10, 1912. 43. I’ve added and subtracted to it over the years to try and make it a decent resource, but at the end of the day I’m just a layperson and a single data point. I would rate the toughness of VG-10 higher than 440C despite Dan’s ratings, and would probably score M390 a notch below where Dan has it based on its high carbide volume  and my own testing . Guide to the Best Knife Steel – KnifeInformer.com. A Comprehensive Guide to the Best Knife Steels – ThePocketKnifeGuy.com, Another rather pretentious article title but we have to bait those clicks, I suppose. “Effects of structure on toughness and grindability of high-speed steel.” In presentation at International Colloquium on ‘High-speed steels’, pp. Stainless steels cannot be said to be “stronger” in any kind of general way. $290.00 $203.00. Huston begins his article with a relatively meaningless introduction that seems to be for the purpose of linking to his other articles on which knives to buy: “Knives are one of the most versatile tools that someone can have on their person for any day-to-day projects. Based on a poll of Knife Steel Nerds Patreon voting members, we have decided to purchase a small impact tester for knife edges. Spyderco was one of the only companies to successfully machine, heat treat and grind this advanced alloy for use in high-performance knife blades. Doing some dumb cuttin' just to see what we can do. 1.4034 stainless steel is essentially a 420HC made in Germany but is given the highest score for toughness of “7” a full 2 points higher than 420HC, and higher than the high toughness steels 5160 and 1050. Now for the actual ratings which I assume is what most people are looking for when they click on one of these articles. The high cost of both purchasing these steels and producing knives out of them limits their usage to a relatively small number of knives. 7 product ratings - Spyderco Manix 2 Ball Bearing Lock Knife Gray FRCP Maxamet Steel C101PGY2. DescriptionThe Spyderco ParaMilitary 2 Compression Lock folder has become one of the world's most popular pocket knives. The full-flat-ground blade includes a fully accessible Trademark Round Hole for swift, ambidextrous, one-handed opening. The solution of the authors above is just to fill in numbers where they don’t know them. Thanks Jul 9, 2019 #2. Though technically not a stainless steel due to its composition, in use it performs exactly like one. European PM Conference Proceedings, vol. Maxamet blade version of the Native 5 with gray FRN handle. https://www.patreon.com/Knifesteelnerds, He also says what the different elements do to a steel (oh no….) Matt gives an “edge retention” rating which is reportedly based on wear resistance and hardness though almost all of the ratings correlate with his wear resistance rating. In terms of toughness the carbide replacement high speed steels are relatively low. Molybdenum will increase toughness which reduces the liklihood of chipping. I think you have encountered “Fake Science”. Top Rated Plus. I prefer to learn and educate. The available datasheets from the steel manufacturers are often missing information on specific toughness, wear resistance, or corrosion resistance tests and when they do have them the tests are typically not comparable between the manufacturers. The primary difference is out-of-this-world edge retention at the cost of a minimal reduction in toughness. If you frequently use your knife to slice up cardboard, there may not be a better steel than CPM-S110V. Here are the ratings: Why is there no page for steel ratings on this website? They are kind of their own thing though so I left them out of this article. There are different steels for different purposes but I don’t like to think of steels in those terms. Outpost 76 1,824 views 2002. ... Carpenter produces this powder steel. However, he also says that, “Many people report that they are able to get knives using steels that contain vanadium such as CPM S30V sharper than they can non-Vanadium steels such as ATS-34.” I’m not sure I’ve heard anyone report that before, as the hard vanadium carbides typically make sharpening more difficult. The Maxamet steel in considered as a “Super Steel”, So it’s a High-end Alloy steel, with an uncommon chemical composition, but I can say that the closest one to it is the CPM S110V (even if it’s stainless steel), in exception of wear resistance; the Maxamet is a great match for the S110v in edge retention, hardness, wear-resistance and price range which is between 100-200 Usd. This Native 5 model has a lightweight gray FRN handle and a full-flat ground Micro-Melt Maxamet alloy steel blade.
Prince2 Practitioner Pdf, How To Fillet A Brown Trout, How Do Mangroves Prevent Flooding, How To Stop Fleece Fabric From Shedding, Sweet Hut Cafe Menu, Surat To Pune Bus Gsrtc, Drinking Fountain Canada,