2010 was especially the year when M390 started to make a splash in the USA, with announced knives from Benchmade [15] and Kershaw [16], and the steel was available in full sheets from Bohler-Uddeholm USA [17][18] and in smaller sizes from Alpha Knife Supply [19]. The high chromium content in M390 means that less of the high hardness vanadium carbide is present in the steel, and the majority of carbide is the lower hardness chromium carbide. Der umkehrbare Taschenclip bietet ultimative Zugänglichkeit.eval(ez_write_tag([[300,250],'outdoormesser_net-large-mobile-banner-2','ezslot_17',112,'0','0'])); Das Design und die grundsätzliche Vielseitigkeit der Drop Point Klinge des Mini Griptilian 556-1 machen sie ideal für den täglichen Gebrauch, Outdoor-Aktivitäten und sogar Survivalsituationen. Ein gutes Messer ist hierbei das Schlüsselwerkzeug. Perhaps the Peters Heat Treat makes a difference. In vielen Fällen konkurrieren Zähigkeit und Härte um die Vorherrschaft, da die Steifigkeit, die der Zähigkeit entspricht, auf Kosten der Fähigkeit gehen kann, sich ohne Verformung zu biegen.eval(ez_write_tag([[336,280],'outdoormesser_net-banner-1','ezslot_4',108,'0','0'])); CPM 20CV bietet eine Zähigkeit, die im Wesentlichen der von 440C entspricht, einem bewährten Edelstahl, der häufig für die Herstellung von Klingen verwendet wird. Tungsten and molybdenum have similar effects in steel which is why they are somewhat interchangeable in high speed steels. [3] Kulmburg, A., and B. Hribernik. Grind. By 2010 [14] M390 was becoming more common in production knives and its popularity (along with 20CV and 204P) has steadily grown since. Erhältlich für alle Messer, die bei einem autorisierten Händler gekauft wurden. Das CATRA-Testinstrument ist Teil der Prüfausrüstung vieler führender Messerhersteller, darunter Benchmade, Buck Knives und Spyderco. Der Böhler N680 Stahl ist…, S90V Stahl ist eine spezielle Stahllegierung die auf nahezu ideale Weise vermeintlich gegensätzliche Eigenschaften in…. M390 exhibits excellent edge retention, corrosion resistance, and high level toughness. For the plastics industry Bohler also wanted to have a high wear resistance powder metallurgy product which had high corrosion resistance (ie stainless). 4.66" (118mm) Edge Length. 31-42. And while it was discovered that these 12% Cr steels didn’t work nearly as well in high speed machining tasks, they were very good for “cold work” tools, particularly dies, because of excellent wear resistance from the many chromium carbides. Thank you for your article and nicely done work with your heat treat. Is the relatively low toughness of M390 at HRC 62 or so? The high volume of chromium carbide means that M390 has a larger carbide structure than those steels, however. Clip Position. Bohler is calling it a "micro-clean" steel, and it has a very fine grain size structure. Es ist hart genug, um mit allem klar zu kommen was man ihm hin wirft, und es braucht nur ein paar Züge über den Lederriemen, um die Schneide schnell wieder auf eine beängstigende Schärfe zu bringen. Despite the Bohler and Latrobe numbers seeming to confirm a higher result I believe the Knife Steel Nerds number is more reliable (I know, I’m biased). This good edge retention has been confirmed in many tests, including CATRA results from Bohler-Uddeholm, Latrobe, and my own. 2.92" (74mm) Weight. Around 1950-1951, David Giles of Latrobe Steel patented two “cold work” high vanadium steels [1][2] which were later named A7 and D7. You can see the rest of the Knife Steel Nerds data which includes 48 different knife steels here. Despite the relatively high chromium in K190, it is not stainless, you can read why in this article on D2 corrosion resistance. Im Vergleich zu anderen kommerziellen Werkzeugstählen ist der CPM S110V außergewöhnlich Verschleißfest und weißt eine hohe Kantenstabilität auf. $258.23 $ 258. All I can add is that M390 in the PM2 performs really well, but have no experience with CPM-S90V (Missed the sprints and cant justify $300-400+ for one on the secondary market). Ein Messer aus CPM 20CV Stahl tut genau das. 2) The specifics of heat treatment may mean that changing hardness doesn’t lead to an increase in toughness, or one which is smaller than might be hoped for. D7 was a modification of D4 with higher vanadium for the same reason. CTS-204P Bohler M390, CTS-204P, and CPM-20CV are all essentially the same steel and sport a near identical composition. Your email address will not be published. CPM 20CV bietet im Wesentlichen die fünffache Verschleißfestigkeit von 440C.eval(ez_write_tag([[300,250],'outdoormesser_net-large-leaderboard-2','ezslot_10',109,'0','0'])); Die Korrosionsbeständigkeit gibt an, wie gut ein Stahl der Reaktion mit Sauerstoff (Oxidation) widersteht wenn er Feuchtigkeit bzw. M390 was one of the earliest powder metallurgy stainless tool steels, coming after S60V but before SG2, Elmax, S90V, ZDP-189, or S30V. Hey, ich bin Andreas. Tip-Up. While 3V (low carbide) increases from 40 to 85 ft-lbs by dropping hardness from 62 to 58 Rc. As stated by Bohler, the design target for M390 was to have high wear resistance and corrosion resistance, though they stated that high toughness is not particularly necessary for plastics processing. However, there are a couple things to keep in mind: 1) High carbide steels have smaller increases in toughness with lower hardness. In the early 1980s, Bohler steel introduced K190 steel which is a powder metallurgy version of D7 [3]. As a Powder Metallurgy (PM) tool steel, you get a combination of impressive wear resistance and edge retention plus the added benefit of being highly corrosion resistant due to high levels of chromium. I understand that might be difficult to do in a large batch but even small runs, or from small niche companies, the samples collected seem to fail remarkably. Hey Larrin, hope all’s well. Made by @Crucible CPM 20CV is a martensitic stainless steel high in Vanadium, Chromium, and Carbon for excellent wear resistance and corrosion resistance, it’s used for plastic injection feed screws, barrel liners, screw tips, mold cavities, and premium Knives.. Verbessert die Verschleißfestigkeit, Warmfestigkeit und Zunderbeständigkeit. Its high austenizing temperature imparts M390 with a high attainable … The vanadium does increase the hardness of the chromium carbides, however. Specs: Overall Length: 8.03" (204mm) Closed Length: 4.66" (118mm) Blade Length: 3.37" (86mm) Blade Thickness:.125" (3mm) Blade Steel: 20CV; Blade Finish: Satin; Handle … Report Save. M390 vs S90V (CPM S90V) M390 Benchmade 20cv is outstanding in my book. “Use of an Iron-Base Alloy in the Manufacture of Sintered Parts With a High Corrosion Resistance, a High Wear Resistance as Well as a High Toughness and Compression Strength, Especially for Use in the Processing of Synthetic Materials.” European patent 348,380, issued November 19, 1992. Starting with the high carbon, 4% vanadium K190 as its basis means that M390 would have relatively high wear resistance. With significant amounts of Chromium, Molybdenum, Vanadium, and Tungsten, these steels are 100% ready for action. M390 / CPM 20CV is a PM stainless steel that offers good wear resistance with excellent corrosion resistance through the use of high chromium and vanadium content. Messerstahl FAQ – Teil 2: Bestandteile von Stahl, Messerstahl FAQ – Teil 3: Verschiedene Stähle und ihre Eigenschaften, Favoriten nach Stahlsorte – PREMIUM OBERKLASSE, Favoriten nach Stahlsorte – MITTLERE OBERKLASSE, Favoriten nach Stahlsorte – UNTERE OBERKLASSE, Favoriten nach Stahlsorte – OBERE MITTELKLASSE, Favoriten nach Stahlsorte – UNTERE MITTELKLASSE, Favoriten nach Stahlsorte – EINSTEIGERKLASSE, CPM S30V Stahl - Eigenschaften und Informationen. M390 has relatively high “chromium in solution” which is the primary factor that controls corrosion resistance apart from molybdenum and nitrogen. CPM steht für “Crucible Particle Metallurgy” und ist einer der beliebtesten rostfreien “Superstähle” weltweit. Carpenter steel introduced their copy of M390 as “Micromelt 20-4” in 2009 [10][11] and was renamed as “CTS-204P” by the beginning of 2010 [12]. Benchmade is awful at grinding S90V compared to 20CV. The incredible CPM-20CV blade is full flat ground for ultimate slicing performance, this Manix … CPM S110V ist ein hochlegierter, rostfreier Werkzeugstahl. .leader-3-multi{display:block !important;float:none;line-height:0px;margin-bottom:15px !important;margin-left:0px !important;margin-right:0px !important;margin-top:15px !important;min-height:400px;min-width:580px;text-align:center !important;}eval(ez_write_tag([[250,250],'outdoormesser_net-leader-3','ezslot_20',119,'0','0']));eval(ez_write_tag([[250,250],'outdoormesser_net-leader-3','ezslot_21',119,'0','1'])); CPM S30V Stahl wurde 2001 von Crucible Industries auf den Markt gebracht und gilt als…, Messerstähle variieren in ihrer Zusammensetzung um unterschiedliche Eigenschaften zu erreichen. [2] Giles, David J. Metallurgy and Testing of Knives and Steel. Tip Carry Position. [5] Huth, S., H. Hill, and W. Theisen. Die chemische Zusammensetzung von CPM 20CV ist neben Eisen wie folgt:eval(ez_write_tag([[580,400],'outdoormesser_net-medrectangle-3','ezslot_0',105,'0','0'])); Wenn ein Messerhersteller ein neues Design plant trägt die Auswahl des Klingenstahls entscheidend zum Erfolg oder Misserfolg des Produkts bei. I noticed that almost every time M390 or 20CV is on here, it seems to be lower than the 60HRC benchmark. In a carbon-rich alloy like CPM 20CV, the process of austenitization heats the steel until its crystalline structure changes to become austenite instead of ferrite. Wie gut ist 1095 CRO-VAN Stahl als Messerstahl? CPM 20CV an excellent steel for plastic injection feed screws, barrel liners, screw tips and mold cavities, especially for plastic resins which contain abrasive fillers. Will the toughness of it be higher? We used the already excellent backbone of the Manix 2 and combined it with Premium CPM-20CV blade steel and eye catching, yet durable Red G10 handle scales. Manix™ 2 Lightweight CPM® … Die Härte für CPM 20CV ist geringfügig höher als die von Benchmade verwendete 440C-Legierung, die 50 bis 60 HRC misst, eine seit langem beliebte Legierung für die Messerherstellung.eval(ez_write_tag([[336,280],'outdoormesser_net-box-4','ezslot_5',107,'0','0'])); Die Zähigkeit gibt an wie gut ein Stahl Stößen oder Beanspruchungen standhält, ohne dass es zu Brüchen, Spänen oder Rissen kommt. These were the highest wear resistance cold work tool steels for several years before the introduction of powder metallurgy steel production in the early 1970s which allowed the design of even higher vanadium steels like 10V. https://knifesteelnerds.com/2020/01/13/s35vn-steel-properties-and-how-to-heat-treat/. As mentioned previously, with M390 getting its good edge retention through high carbide volume rather than the hard vanadium carbides, ease in sharpening can be somewhat better than steels with comparable edge retention. CPM 20CV Stahl ist die Antwort von Crucible Industries auf den Edelstahl M390 von Böhler. We now have over 200 supporters! CPM 20CV steel also gets HRC index of 58 in terms of hardness. The previous specimens were heat treated at 2140°F, so we tested temperatures between 2000 and 2150°F: The chart shows that M390 is capable of rather high hardness, particularly for its level of corrosion resistance. This was somewhat puzzling behavior because I don’t know of anything about M390 in particular that would lead to higher than expected toughness for its given amount of carbide. Limit of 2 per household. Knife Steels Carpenter CTS-204P, Latrobe DuraTech 20CV, Bohler-Uddeholm M390 Version 4.36. Reicht das nicht aus hilft nur noch eine andere Stahllegierung zu verwenden. … In my corrosion resistance testing, M390 scored very well (I tested CTS-204P), better than S30V, S35VN, S90V, and SG2, and probably a bit better than S45VN. CPM 20CV. High vanadium steels were patented in the late 1930s which became steels like M4 and T15 with 4-5% vanadium. Er half Carpenter auch bei der Entwicklung des sehr ähnlichen CTS-204P. Da sich Wärmebehandlungsrezepturen auf die Endhärte eines Klingenstahls auswirken, kann ein anderer Hersteller andere HRC-Werte für denselben Stahl angeben. Its ease in sharpening is also good with soft abrasives, at least relative to its level of wear resistance. Die Verschleißfestigkeit gibt die Fähigkeit eines Stahls an, mit einer Vielzahl von physischen Objekten und chemischen Substanzen in Kontakt zu kommen und diesen zu widerstehen ohne sich abzunutzen oder an Qualität zu verlieren. However, I had a suspicion that the samples were heat treated at a temperature which was too high, leading to excess “retained austenite.” Excess retained austenite drops the hardness by a small amount but lowers the “yield strength” relative to the hardness, and also can transform to brittle, untempered martensite during use. Home > Knives > Steels. 60 Rc is a nice round number but isn’t necessarily a benchmark or a sign of a superior heat treatment. It is a martenistic steel produced with third generation powder metallurgy. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Dabei ist das Thema Messerstahl noch lange nicht ausgereizt, ständig werden neue Legierungen erprobt, Produktionsqualitäten gesteigert und Verfahrenstechniken verbessert. It may be possible to somewhat increase toughness with lower hardness. Full-Flat. A7 was a modification of A2 with higher carbon and vanadium for wear resistance. [4] Kulmburg, A., J. Stamberger, and H. Lenger. While there are heat treating mistakes that could lead to values less than 60 Rc, it is probably a choice that resulted in the desired hardness. According to some … Dabei ist der durchschnittliche Messerkäufer gar nicht so sehr an der Art des Stahls interessiert als an der Optik des Messers, dem Nutzen und vor allem am Preis. Deine E-Mail-Adresse wird nicht veröffentlicht. Latrobe at the time was owned by Timken, and 20CV steel began to appear on the Timken website in 2005 [7], and advertised in Blade magazine around the same time [8]. Obwohl der bekannte Begriff „Edelstahl“ letztlich eine Fehlbezeichnung ist (da zu optimistisch), korreliert der Chromgehalt dennoch mit der Fähigkeit Oxidation zu verringern und eine vorbeugende Pflege zu ermöglichen um so Korrosion insgesamt zu verhindern. Notify me of follow-up comments by email. Erhöhung der Warmfestigkeit, Anlaßbeständigkeit und Verschleißfestigkeit bei hohen Temperaturen bis hin zur Rotglut. Er half Carpenter auch bei der Entwicklung des sehr ähnlichen CTS-204P.eval(ez_write_tag([[468,60],'outdoormesser_net-box-3','ezslot_24',103,'0','0'])); Diese Fakten allein sollten dem Messerliebhaber schon eine Menge sagen. M390 is one of the new "super steels". CPM S110V . eval(ez_write_tag([[250,250],'outdoormesser_net-leader-4','ezslot_22',117,'0','0'])); Welcher Messerstahl ist der richtige für mich? Later there were other modifications of D3 such as D4 which had higher molybdenum for greater “hardenability” meaning it could be quenched more slowly and still achieve full hardness. Latrobe separated from Timken in 2006 [9] but continued to sell Duratech 20CV and it became popular with several major knife manufacturers. I would recommend keeping your M4 blades with a thin coat of oil on them when not in use to prevent them from corroding. Bohler-Uddeholm USA also conducted CATRA and toughness experiments to help in the marketing of their knife steels at that time. What it is: CPM 20CV is a "Crucible Particle Metallurgy" stainless steel, widely regarded as a "super steel" for its properties and performance. “Corrosion of stainless PM tool steels: Interpretation of current density potential curves in acid environments: Dedicated to Prof. em. I disagree…about M390 not being a good steel fo a fixed blade….I have a number of Bradford Knives in M390 and have no issues. It saw limited use in some European custom knives, such as this knife by Dietmar Kressler made in 1999 [6]: Dietmar Kressler knife in M390 made in 1999 [6]. CPM 20CV weist eine um 30% höhere Korrosionsbeständigkeit auf als 440C. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! Manix™ 2 FRCP Black/Black Blade. G-10. Stainless steels with a lower carbide content like S35VN, S45VN, or Vanax also have a finer microstructure. The microstructure is relatively coarse for a powder metallurgy steel and it has a high volume of carbide, which means that the toughness of the steel is relatively low. Mouse over multi alloy graph bars to see exact values. Der Herstellungsprozess von CPM führt zu einem … So far I like it but have not used it much. Zähigkeit ist schwieriger zu quantifizieren als die Härte, da kein einzelner Test ein standardisiertes Maß für das Attribut liefert. However, tungsten is more expensive than molybdenum, you have to use twice as much tungsten to get the same effect (because tungsten is a heavier element), and tungsten does not improve hardenability like molybdenum does. Es erhöht die Zugfestigkeit, da es als Karbidbildner wirkt. Dr.-Ing. It offers extremely high wear resistance and corrosion resistance. CPM 20CV Stahl ist die Antwort von Crucible Industries auf den Edelstahl M390 von Böhler. Thank you Larrin! outdoormesser.net ist Teilnehmer am Amazon Services Associates Programm, einem Affiliate-Werbeprogramm, das uns die Möglichkeit bietet, Einnahmen durch Verlinkung mit Amazon.de und angeschlossenen Websites zu erzielen. Böhler M390 Microclean (optimale Alternative zum CPM S 90 V), pulvermetallurgischer Stahl aus dem Hause Böhler. Es gibt heute eine nahezu unüberschaubar großen Auswahl an Messerstählen. To see if I was right, I enlisted the help of Shawn Houston to heat treat some M390 for me because I was unable to obtain liquid nitrogen because of COVID-19. In größeren Mengen Erhöhung der Sprödigkeit und Herabsetzung der Schmiedebarkeit und Schweißeignung. Diese Fakten allein sollten dem Messerliebhaber schon eine Menge sagen. Von diesen Skalen wird die C-Skala verwendet um die Härtewerte für Messerstähle darzustellen. The edge retention of M390 is also relatively high from its high carbide content and the 4% vanadium addition. I’ll leave this post open for response to it’s implied sentiment of “what the heck, M390?”. What if M390 is at HRC 60? Bei Benchmade-Messern die CPM 20CV verwenden beträgt die Härte 59 bis 61 HRC. The patent application for M390 was submitted in 1989 [4]. Das leichte Design und die Griffe des Mini Griptilian 556-1 machen es komfortabel zu halten, zu benutzen und überall hin mitzunehmen. As has been described in the history section, M390 as a steel design has been successful enough that it has been copied by at least two other companies, and has become popular in many knives. Manix™ 2 FRCP Black . Ausführlicher Artikel – hier | Preis auf Amazon prüfen – hier.eval(ez_write_tag([[300,250],'outdoormesser_net-large-mobile-banner-1','ezslot_16',113,'0','0'])); Der Schlüssel zu einem tollen Messer ist mehr als nur oft der Stahl. Latrobe does not have their own powder metallurgy manufacturing facilities so presumably this means that Crucible was producing 20CV for Latrobe before the purchase of Latrobe by Carpenter. Sheath. Verringerung der Schweißbarkeit. Vier vergleichsweise objektive Kriterien und ein etwas subjektives Leistungsmaß sind relevant wenn Messerhersteller einen Stahl für ein Produkt auswählen. [1] Giles, David J. I previously wrote about the performance differences (or lack thereof) between the three versions in this article. See the S35VN heat treating and toughness testing to see of an example of why that may be the case. ). Unzureichende Zähigkeit kann auf verschieden Faktoren zurück zu führen sein. 4 (2010): 195-200. Tungsten is not a very common element in stainless steels. the introduction of powder metallurgy steel production, lowers the “yield strength” relative to the hardness, can transform to brittle, untempered martensite, makes deburring in sharpening much more challenging, https://knifesteelnerds.com/2020/01/13/s35vn-steel-properties-and-how-to-heat-treat/, https://docs.google.com/spreadsheets/d/1OepNr_D4lqbdTFqdqWl1rmAd4bOzPzJe6J0iEWrdJGU/edit#gid=0. Latrobe does not have their own powder metallurgy manufacturing facilities so presumably this means that Crucible was producing 20CV for Latrobe before the purchase of Latrobe by Carpenter. Ball Bearing. Wie die oben genannten Stähle ist CPM 20CV ein pulvermetallurgischer Werkzeugstahl. The Bohler-Uddeholm tests and mine were with steels at 61-62 Rc except for 440C which was 56-59 Rc. The toughness of the new specimens was significantly lower, and more in line with expectation based on the carbide content and relatively large carbides: So when plotting all of the steels for toughness together you can see that M390 has relatively low toughness. It is a bit puzzling why the tungsten was added to M390 when it was not present in the K190. CPM 20CV erreicht einen CATRA-Testwert von 180, verglichen mit dem Wert von 440C von 100. You can compare with many other steels in this article which contains all of my micrographs. I also have a chart which estimates corrosion resistance based on Cr, Mo, and N in solution using the results of my corrosion resistance testing which I have shown below. Verschleißprüfungen simulieren den realen Kontakt zwischen einer Messerklinge und einer Verschleißquelle und dokumentieren deren destruktive Wechselwirkung. Sometimes the only failing on here from companies will be with their M390. Take, for instance, CPM 20CV and Carpenter CTS-204P. When sharpening with diamond or CBN stones there would be no benefit. Etwas, das sich von der Masse abhebt. Folks acted like it was the greatest stainless ever and i didn’t understand why. razorsharp wrote:S90v - Tiny bit more edge retention...more … Timken-Latrobe collaborated with SOG to test 20CV, reporting superior edge retention to S30V. N/A. Unless of course, you would like to force the patina. I have a 940-1 with a cpm-20cv blade and I can't decide if I'd rather have that or the s90v. UM die Korrosionsfestigkeit zu erhöhen ist der gebräuchlichste Weg der Legierung Chrom hinzuzufügen. What it is: M390 stainless steel, a powder-metallurgy material produced by Bohler-Uddeholm, is widely regarded as a "super steel" for its properties and performance. Lock Type. The Latrobe data does not state the hardness values. Der G10-Griff ist langlebig, unempfindlich gegen Feuchtigkeit und bleibt auch unter extremen Temperaturen stabil. 23. The steel saw little use in knives until Latrobe steel copied M390 and sold it as 20CV, which then became popular with several production knife companies. Your email address will not be published. In fact, M390 is sometimes known as “stainless K190” [5]. Knife Steel Chart Mobile: Mouse over element names to get quick help on its effects in the alloy. According to the datasheet, the recommended heat treatment without cryo results in about 58-59 Rc. Kommt es zu Verschleiß können die Verschleißursachen von den Gegenständen herrühren die der Anwender zu schneiden versucht, und/oder von anderen Einflüssen in der Arbeitsumgebung. Chromium carbides tend to be larger than vanadium carbides in power metallurgy steels which limits toughness, but they are easier to sharpen because they are softer than common sharpening abrasives like aluminum oxide.