And M398 has quite a bit less toughness than that: Adapted from  So it is apparent that the design of M398 is all about wear resistance and essentially ignores toughness. $145.00 $101.50. The nitrogen content is the same as 14C28N, which may simply be due to limits in nitrogen additions with conventional steel production. Use 1900°F if using a freezer instead of liquid nitrogen. It would be helpful to see 14C28N in your toughness comparison graphs and in the Edge Retention table, since 14C28N is arguably its closest competitor among affordable high-N steels. How does 14C28N compare in toughness and edge retention? Therefore Nitro-V would be well suited to knives requiring good toughness. The ParaMilitary 2 has a blade shape, grind, and spine thickness (0.15”) that all comes together in a very simple looking manner. Alongside the Maxamet models, Spyderco also announced a new “Zome” edition of the Delica 4 (shown below) and Endura 4. The 450°F temper led to a reduction in hardness and toughness, so it is not recommended. This significant increase in hardness means that Maxamet will be a very hard-wearing steel with off the charts edge retention. The 300°F temper led to increased hardness with a reduction in toughness, as expected. Spyderco Pochi Kazuyuki S45VN Titanium Frame Lock Folder C256TIP ... Spyderco SpyOpera Brown Canvas Micarta Satin M390 Back Lock Folder C255CMP . Therefore the optimal austenitizing range for Nitro-V is 1900-1950°F because 1850°F leads to a reduction in both hardness and toughness and 2000°F led to excessive amounts of retained austenite. Maxamet is not stainless and requires proper maintenance to prevent rust and corrosion. Choose Options. I recommend at least going into a household freezer directly after quenching to reduce the retained austenite as much as possible. M390. Therefore the corrosion resistance of Nitro-V may be somewhat better than AEB-L depending on the environment. Pitting is particularly a problem in salt water. So nitrogen can sometimes be added for improved hardness without a sacrifice in corrosion resistance. Doug Ritter RSK® MK1-G2 Knifeworks Exclusive - Black / Stonewashed. Buy Spyderco Manix 2 Lightweight Signature Folding Knife with 3.37" CTS BD1 Black Steel Blade and Black FRCP Handle - PlainEdge - C101PBBK2: Pocket Knives & Folding Knives - Amazon.com FREE DELIVERY possible on eligible purchases SALE* $339.95 $209.95 Calculations of chromium in solution from Thermo-Calc confirms that the two are similar, especially when considering that Nitro-V needs to be austenitized at a somewhat lower temperature. $205.00. $160.00. Made by Bohler in Austria. Oil quenching is also possible though plate quenching is good for helping to maintain flatness. 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. Another obvious comparison is with 14C28N which was designed as a version of 13C26 modified for improved corrosion resistance. Spyderco C101PBL2 Manix 2 Lightweight, 3.37" CTS BD-1,Translucent Blue FRCP Handle. The compositions of the two are similar and the micrographs also look very similar in terms of carbide content. Makes sense with the logarithmic scale. I don’t normally use preheating as I only have one furnace so using a preheat ends up taking excessive amounts of time, preheating is to help with heating up the steel evenly to reduce warping and other issues. This could be due to insufficient dissolution of carbide (carbides are bad for toughness), or possibly because increased austenitizing temperatures led to more retained austenite despite the use of cryogenic processing. Advantages: Extremely high wear resistance and corrosion resistance. That’s been tested in more recent articles: https://knifesteelnerds.com/2020/05/01/testing-the-edge-retention-of-48-knife-steels/, Your email address will not be published. “We also did extensive scientific testing on Maxamet’s performance, edge retention, and toughness and found that it easily rivaled the very best steels we’ve ever used,” they say. $290.00 $203.00. All-Around: M390, CTS-204P, and CPM-20CV ... Maxamet is one of two current high-hardness kings, with HRc marks in the high 60s approaching 70, a … Buy Spyderco Manix 2 Signature Folding Knife with 3.37" CPM S30V Steel Blade and Durable Black G-10 Handle - CombinationEdge - C101GPS2: Pocket Knives & Folding Knives - Amazon.com FREE DELIVERY possible on eligible purchases Therefore I recommend austenitizing no higher than 1950°F. Nitro-V has a very fine microstructure, with AEB-L possibly being a touch finer. Presented by: Work Sharp Knife & Tool Sharpeners Hello and welcome: the Readers’ Choice Awards poll is open – check it out below! The vanadium addition is very small, likely too small to make a contribution to wear resistance and edge retention. You can read more about carbides and interactions between different elements in this article on carbides. 63-64 HRC. $175.00. While there are some parallels, such an improving wear resistance, the analogy fails in the prediction that carbides can "pop out" of the matrix. I believe that Nitro-V and AEB-L are both available up to 1/4″ so unless all of that is sold out thickness shouldn’t need to be a deciding factor. Presented by: Work Sharp Knife & Tool Sharpeners Hello everyone! In Stock . Please vote in each of the ten categories... Another classic ESEE fixed blade is getting a variant made from powder metallurgy steel. You can get Nitro-V in 1/4″ though. My understanding is that step is to help with grain refinement before ramping to austenizing temperatures. The tradeoff is that those steels have much lower toughness than AEB-L and Nitro-V, of course. Maxamet’s distinguishing metallurgical characteristic is the high carbon content (2.15%) and the inclusion of 10% Tungsten. This reduction in toughness was somewhat unexpected because tempered martensite embrittlement is not expected with this tempering temperature in high alloy steels. Both AEB-L and Nitro-V reach about 64 Rc, while 14C28N reached 63.5 Rc, though I didn’t austenitize high enough with 14C28N to see where the hardness begins to decline. However there are a couple things that led me to make that statement: The only way it could help with grain size is if it helped with using a short high temperature hold. A 450°F temper led to an unexpected reduction in toughness. Maybe you’ve had one… In stainless steels, the amount of retained austenite for a given amount of carbon in solution (hardness) is how much chromium is in solution (corrosion resistance). Temper between 300 and 350°F depending on desired hardness. The blade shape, a clip point in most spec sheets, has a nice gradual belly, and a very flat spine, once you’re past the *sharply jimped* thumb ramp. However, when comparing with AEB-L above, the hardness was not enhanced with Nitro-V. In Stock . The peak hardness of Nitro-V is relatively similar to AEB-L and 14C28N. > > Keep your folders awesome. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! It is significantly tougher than the powder metallurgy stainless steels like M390, Elmax, and S35VN. Both ThermoCalc and JMatPro predict that no vanadium carbide is present at typical heat treating and forging temperatures. Nitro-V is expected to have very similar wear resistance and edge retention to AEB-L, but there has not been any testing to confirm that. Harkins, offers users a... Steel Will Screamer is First out of the Gate for 2020, Spyderco Voted Best Overall New for 2019 Lineup, Benchmade 980 Turret Voted Work Sharp Knife of the Year, Cold Steel AD-15 Voted Most Innovative New Knife 2019. The crew at KnifeNews is beyond stoked to be able to announce the Readers’ Choice Awards for 2020, the third... Mora Eldris LightDuty Voted Best New EDC Fixed Blade 2020, Spyderco Nightstick Voted Best New Tactical Fixed Blade 2020, 3rd Annual Readers’ Choice Awards Poll: Vote for Your Favorite Knives of 2020. Bohler calls this steel “Microclean” and it can be polished to achieve a true mirror. But I can’t recommend tempering higher than 350°F right now because I don’t know where the reduction in toughness takes place. Folding Knives with M390 Steel Automatic Knife Ordering Agreement IN COMPLIANCE WITH FEDERAL STATUTES , KnifeCenter, Inc requests that you read carefully the requirements set forth below, and agree to this prior to your purchase or receipt of any automatic opening knife from our company. Nitrogen is not as prone to form nitrides with chromium as carbon is to form carbides. Grab a Pack of 5 Microfiber Blade Sleeves for $8.99 < <. Join knife companies and subscribe to the KnifeNews email. Nitro-V is a stainless steel sold by New Jersey Steel Baron which was first released in 2017 . We report the latest news on new and popular knives, production knife companies, custom makers, innovations, and cover topics that are of interest to the knife carrying community. The nitrogen may itself increase the corrosion resistance somewhat relative to AEB-L. Nitro-V is capable of approaching 64 Rc when heat treated for maximum hardness, and can of course be heat treated for lower hardness as well depending on the desired properties. Spyderco Para 3 Maxamet, S110V, M390 bonus LT Wright Bushcrafter HC. WTS--Spyderco Mule blades (MAXAMET, K390, S110V, CTS-XHP and Cobalt Special) Prices reduced ... Not to be confused with the more popular M390, but has a great deal more edge retention. The Spyderco Para Military 2 - What more needs to be said? That would put the three steels in a similar class in terms of wear resistance and slicing edge retention. I am not sure which steel will be Crucible’s standard bearer in the future, this or 20CV (which is a steel very similar to M390). I have cut off the lines where peak hardness was achieved in each. Spyderco Para Military 2 Knife. You can read about why hardness is limited by retained austenite in this article on Vanax steel. share. The steel was then tempered at 300, 350, 400, or 450°F. Bohler M390, CTS-204P, and CPM-20CV are all essentially the same steel and sport a near identical composition. Nitro-V has very good toughness compared with other steels. I used 4 specimens for each condition and these were machined by me. This thread is archived. The Spyderco Para 3 offers the same great ergonomics of the Paramilitary 2 in a smaller, more urban friendly package. In this section, we’re going to compare our steel with other steels, and for this, I use four criteria; Edge Retention, Corrosion resistance, Ease of Sharpness, and Toughness, and I use a scale or note from 1 to 10. Unfortunately here “down under” AEB-L is unavailable and even 12C27 only comes in thin stock. I next produced toughness specimens using the 1950°F austenitizing temperature plus cryo but tempered at 300 and 450°F to test the effect of tempering temperature. Buy SPYDERCO SP81GPDGY2 for $217.00 with free shipping - Spyderco C81GPDGY2 Paramilitary 2 Folding Knife 3.47 inch Maxamet Satin Blade, Dark Gray G10 Handles at KnifeCenter K390 VS Steel . The higher 2000°F has the same hardness despite the increase in hardness of the martensite because of an increase in retained austenite. AEB-L and Nitro-V have a similar volume of carbide, approximately 4-6%. 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. Thanks to Brad Ettinger, James Henley, and Edgar Candela for becoming Knife Steel Nerds Patreon supporters! Retained austenite in the right amounts can sometimes improve toughness. Nitro-V does indeed look very similar to AEB-L, having the same C, Cr, and Si along with a minor difference in Mn. 1) toughness is on somewhat of a log-scale, meaning 5 vs 10 ft-lbs is a bigger difference than 25 vs 30 ft-lbs. Thanks Larrin. CTS-XHP —A stainless, powdered steel from Carpenter that is becoming more popular with some knife companies and makers. To check your heat treatment against mine, it is best to perform heat treatments from a range of austenitizing temperatures and going straight into the cold treatment used, whether freezer, dry ice, or liquid nitrogen. Para™ 3 Lightweight. The positive feedback from Mule Team mainstays probably had something to do with Maxamet’s quick move to production models, but Spyderco has also been testing it in-house for some time. I also have micrographs of AEB-L and 14C28N. It will be interesting to see what sort of a premium these new versions will command. Presented by: Work Sharp Knife & Tool Sharpeners The Mora Eldris LightDuty is the KnifeNews Readers’ Choice for Best New EDC Fixed Blade 2020! Notify me of follow-up comments by email. $206.50. Thor DS93X. You can read about those limits in this article on nitrogen additions. M390 hardens to 60-62 HRC. Disadvantages: Relatively difficult to sharpen. MAXAMET VS M390 The M390 offers better toughness, corrosion resistance and it’s a bit easier to sharpen compared to the Maxamet, but for the edge retention Maxamet is the best. CTS-204P is made by the USA-based Carpenter Technology Corporation and CPM-20CV is manufactured by Crucible Industries. Your email address will not be published. This appears to be significantly, not slightly, tougher. AEB-L has edge retention similar to 52100, which is significantly lower than higher carbide content stainless steels like 440C, CPM-154, S30V, etc. 14C28N, for example, was designed to have a reduction in carbon along with an increase in nitrogen to make up for the carbon in terms of hardness and an increase in chromium for improved corrosion resistance. 14C28N, however, has significantly more chromium in solution, which likely gives it better corrosion resistance than Nitro-V and AEB-L. Nitrogen can also help improve corrosion resistance, when it comes to pitting it has 16 times the contribution of chromium. I don’t know if a 400°F temper would see similar results. 100% Upvoted. I mostly carry a 154cm M390 or 20cv griptilian and never had a problem. 33% Score (below this is a steel that scores a zero): 187 (33% of Maxamet's 563); closest is 3V at 198. I believe that Nitro-V and AEB-L are both available up to 1/4″ so unless all of that is sold out thickness shouldn’t need to … Overall the properties of Nitro-V are expected to be similar to AEB-L with perhaps an improvement in corrosion resistance. save hide report. The superior edge retention also doesn’t come without drawbacks. When using a freezer instead of liquid nitrogen, the peak austenitizing temperature is usually reduced relative to liquid nitrogen treatments because the freezer is not as effective at reducing retained austenite. With significant amounts of Chromium, Molybdenum, Vanadium, and Tungsten, these steels are 100% ready for action. Low alloy steels see all of their carbide dissolve at forging temperatures and high heat treating temperatures which allows the grain size to grow rapidly. New Spyderco Releases Just Put CTS Maxamet Super Steel on the Map, Tungsten contributes to the harden-ability, Millit Knives Stepping into the Spotlight in 2017, The X5 Flipper Breaks New Ground for Hogue, Sal Glesser Shares a Piece of Spyderco History on the Forum, ESEE Expands S35VN Lineup to Include Model 4, The 3rd Annual KnifeNews Readers’ Choice Awards are Here. The Mule Team Project is an ongoing Spyderco initiative which allows fans to purchase a simple, naked fixed blade made from different exotic alloys for testing and review.
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