Few steels can approach this level of hardness while remaining usable in cutlery applications. CTS-204P is made by the USA-based Carpenter Technology Corporation and CPM-20CV is manufactured by Crucible Industries. But, it’s not easy to work with, and few knife makers have been able to rise to the challenge of machining, grinding, and sharpening it. In Stock . 2) there is more scatter in results at higher values. K390 VS Steel . Does that mean the process recommended above skips the pre-heat/equalizing (15min hold at 1500F) step in NJSB’s own heat treating guide? I recommend cryogenic processing for maximizing strength when heat treating. However, when comparing with AEB-L above, the hardness was not enhanced with Nitro-V. Dyes are hand-brushed on to the FRN scales, meaning that each Zome knife will be unlike any other. The blade of this remarkable knife is crafted from Böhler-Uddeholm M390 particle metallurgy stainless steel. Worn concrete sidewalk with exposed gravel. 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. Regarding the vanadium being insufficent for grain refinement. You can read about those limits in this article on nitrogen additions. The ParaMilitary 2 has a blade shape, grind, and spine thickness (0.15”) that all comes together in a very simple looking manner. Nitro-V has a very fine microstructure and very good toughness when compared with other steels. Here is a chart showing the relative position of AEB-L to get an idea of where Nitro-V likely sits: Nitro-V looks very similar to AEB-L with a nitrogen and vanadium addition. Choose Options. Although it is officially MT24 (Mule Team 24), it leapfrogged the MT23 to get it into users’ hands faster. The full flat grind is relatively thin behind the edge (between 0.020-0.025” depending on where along the belly you’re checking), and has a gradual flat face that terminates at the spine. 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. The Zome models are already available for purchase at Spyderco’s HQ store, and will be available from other retailers shortly. $175.00. I heat treated the specimens and Mike Pierce kindly machined them for me. This shows how good Maxamet is at this one particular thing. * * * EXCLUSIVES * * * C172GBLTIP: Spyderco Plain Edge CTS-204P Titanium RIL with Blue G-10 Domino Bento Box Shop Exclusive You may order as many as you like, no limit. Presented by: Work Sharp Knife & Tool Sharpeners The Mora Eldris LightDuty is the KnifeNews Readers’ Choice for Best New EDC Fixed Blade 2020! 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. $205.00. Nitro-V is a stainless steel sold by New Jersey Steel Baron which was first released in 2017 [1]. 2) there is more scatter in results at higher values. M390. 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 Heat treating without cryo would mean a reduction in hardness and a reduction in the peak austenitizing temperature. Benchmade’s 581 Barrage is an affordable example of M390 performing at its best. Grab a Pack of 5 Microfiber Blade Sleeves for $8.99 < <. I used 4 specimens for each condition and these were machined by me. The steel was designed and produced in collaboration with Buderus Steel as a version of Uddeholm AEB-L modified with nitrogen and vanadium. Para™ 3 G-10 Digital Camo. Maxamet is not stainless and requires proper maintenance to prevent rust and corrosion. 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 … 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. You can read more about the charpy specimens we use here. Peter Bruno of New Jersey Steel Baron provided me the following information on the steel: Nitro-V Data. Choose Options. Join knife companies and subscribe to the KnifeNews email. Check hardness and austenitize no higher than the peak hardness. I mostly carry a 154cm M390 or 20cv griptilian and never had a problem. 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. For heat treatment experiments on Nitro-V I austenitized for 15 minutes at 1850, 1900, 1950, and 2000°F followed by plate quenching and then immediately going into liquid nitrogen for an hour. 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. Nitrogen is not as prone to form nitrides with chromium as carbon is to form carbides. 100% Upvoted. Who uses it: Benchmade, Zero Tolerance. 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. Maxamet’s distinguishing metallurgical characteristic is the high carbon content (2.15%) and the inclusion of 10% Tungsten. Therefore the corrosion resistance of Nitro-V may be somewhat better than AEB-L depending on the environment. But grain growth with standard temperatures shouldn’t be an issue. The peak hardness of Nitro-V is relatively similar to AEB-L and 14C28N. It is significantly tougher than the powder metallurgy stainless steels like M390, Elmax, and S35VN. The similar peak hardness of Nitro-V and AEB-L may therefore indicate that the amount of chromium in solution is similar. M390 hardens to 60-62 HRC. It will be interesting to see what sort of a premium these new versions will command. However there are a couple things that led me to make that statement: Para™ 3 G-10 Digital Camo Black Blade. This appears to be significantly, not slightly, tougher. Maxamet’s distinguishing metallurgical characteristic is the high carbon content (2.15%) and the inclusion of 10% Tungsten. 13C26 is nearly identical to AEB-L but produced by Sandvik. Oil quenching is also possible though plate quenching is good for helping to maintain flatness. This Paramilitary exclusive is sure to turn heads with its red G-10 handle and all-around good looks all while performing like an all star with Bohler-Uddeholm’s M390 super stainless steel. 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. The Spyderco Para Military 2 - What more needs to be said? Overall the properties of Nitro-V are expected to be similar to AEB-L with perhaps an improvement in corrosion resistance. The 1850°F austenitized led to reduced toughness relative to the 1900 and 1950°F conditions. Nitro-V has a very fine microstructure, with AEB-L possibly being a touch finer. 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. But I can’t recommend tempering higher than 350°F right now because I don’t know where the reduction in toughness takes place. Presented by: Work Sharp Knife & Tool Sharpeners Hello everyone! Made by Bohler in Austria. While there are some parallels, such an improving wear resistance, the analogy fails in the prediction that carbides can "pop out" of the matrix. The tradeoff is that those steels have much lower toughness than AEB-L and Nitro-V, of course. The only way it could help with grain size is if it helped with using a short high temperature hold. “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. It has slightly lower toughness than AEB-L for unknown reasons. Typically such small additions of vanadium are for the purpose of grain refinement in low alloy steels. New comments cannot be posted and votes cannot be cast. If you are interested in trying out Maxamet but can’t wait for the Manix or Native, the MT24 is still available for purchase. Furhtermore, since AEB-L and Nitro-V have the same bulk Cr, to put more Cr in solution relative to AEB-L it would require a reduction in carbide content which would reduce wear resistance and slicing edge retention. 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. 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. Spyderco Sage 1 Cool Gray G10 Satin Maxamet Liner Lock Folder C123GPGY . Very nice wtriteup, greatly appreciated. We are all familiar with the surface voids produced in concrete when a stone from… > > Keep your folders awesome. Doug Ritter RSK® MK1-G2 Knifeworks Exclusive - Black / Stonewashed. $145.00 $101.50. best. That said, S30V is a great steel! I recommend at least going into a household freezer directly after quenching to reduce the retained austenite as much as possible. 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. Through over a month of consistent use, my Paramilitary 2 blade was still sharp enough to slice through phone book paper and stick against my thumbnail. I also have micrographs of AEB-L and 14C28N. 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. 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 Nitro-V does indeed look very similar to AEB-L, having the same C, Cr, and Si along with a minor difference in Mn. 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. I agree it does depend on one’s definition of slightly. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! K390 VS M390. Enter your email address to subscribe to this blog and receive notifications of new posts by email. That means that the 2000°F austenitize likely leads to a decrease in strength and toughness. 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. CTS-XHP —A stainless, powdered steel from Carpenter that is becoming more popular with some knife companies and makers. You can read about why hardness is limited by retained austenite in this article on Vanax steel. For toughness testing I austenitized Nitro-V at 1850, 1900, and 1950°F for 15 minutes, followed by plate quenching and cryo, and then tempered twice at 350°F for two hours each time. A 450°F temper led to an unexpected reduction in toughness. Nitro-V has very good toughness compared with other steels. The superior edge retention also doesn’t come without drawbacks. 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 Black Blade. $160.00. Presented by: Work Sharp Knife & Tool Sharpeners The Spyderco Nightstick is the KnifeNews Readers’ Choice for Best New Tactical Fixed Blade 2020! level 1. Advantages: Extremely high wear resistance and corrosion resistance. $295.00. Your email address will not be published. Knifemaker Mike Pierce reported to me that he achieved peak hardness of 60.5 Rc from 1900°F without a cold treatment, which was increased to 63 Rc when going directly into the freezer after the quench. This high-performance alloy offers very high wear and corrosion resistance, yet remains extremely easy to sharpen and maintain. >> See knives with M390 … I have cut off the lines where peak hardness was achieved in each. 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. One question: you write that Nitro-V has “slightly” lower toughness than AEB-L, but if I read the graph right AEB-L has a toughness about a third greater at around HRC 61 (~33 ft-lbs vs ~22 for Nitro-V). So nitrogen can sometimes be added for improved hardness without a sacrifice in corrosion resistance. No price has been announced for either the Maxamet Manix 2 or Native 5. share. Required fields are marked *. The toughness is tested by averaging three specimens which are unnotched subsize charpy specimens. The compositions of the two are similar and the micrographs also look very similar in terms of carbide content. Presented by: Work Sharp Knife & Tool Sharpeners Hello and welcome: the Readers’ Choice Awards poll is open – check it out below! The ATAC, designed by legendary custom maker J.A. Disadvantages: Relatively difficult to sharpen. The Spyderco Forums are a special place for many reasons, not least of all because members of the Spyderco crew often post and interact with fans on there –... Kyle Chumchal of KC Knives has joined the engineering team at Microtech. 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). The drawbacks here are, again, sharpenability. I don’t know if a 400°F temper would see similar results. I have previously shared a micrograph of Nitro-V that I took along with 41 other steels. After successful internal testing and positive feedback from some hardcore fans, Spyderco is preparing to roll out a Manix 2 Lightweight and a Native 5 Lightweight in Maxamet super steel. M390 itself is a little less tough than K390, which is a high wear resistance non-stainless steel comparable to CPM 10V. How does 14C28N compare in toughness and edge retention? If you are unfamiliar with the Para Military 2, this will help you get a better understanding of one of the most popular knife designs in the past 10 years. Maybe you’ve had one… $140.00. 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. The peak austenitizing temperature of Nitro-V is a bit reduced relative to AEB-L. Nitrogen is typically added to steel in an attempt to improve hardness, corrosion resistance, or both. 63-64 HRC. You can read more about the history of AEB-L, 13C26, and 14C28N in this article. save hide report. Para™ 3 G-10 Dark Gray Maxamet. The peak hardness is limited by retained austenite rather than necessarily by how much carbon and nitrogen can be put in solution. I’m considering using Nitro-V over AEB-L (and 12C27) for the sole reason that it’s available in greater thicknesses. Both ThermoCalc and JMatPro predict that no vanadium carbide is present at typical heat treating and forging temperatures. $290.00 $203.00. The nitrogen content is the same as 14C28N, which may simply be due to limits in nitrogen additions with conventional steel production. AEB-L and Nitro-V have a similar volume of carbide, approximately 4-6%. Spyderco C101PBL2 Manix 2 Lightweight, 3.37" CTS BD-1,Translucent Blue FRCP Handle. 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. So you’ve seen a PM2 before. The steel was then tempered at 300, 350, 400, or 450°F. This is the looker in the bunch. My understanding is that step is to help with grain refinement before ramping to austenizing temperatures. Temper between 300 and 350°F depending on desired hardness. If you can get past that, which should be less of a hurdle than it would be on, say, Maxamet, then you should be fine. Retaining the intuitive and strong compression lock, the Para 3 is a reliable EDC tool that will offer all day comfort at just 3.4 ounces. You can get Nitro-V in 1/4″ though. The 450°F temper led to a reduction in hardness and toughness, so it is not recommended. Another obvious comparison is with 14C28N which was designed as a version of 13C26 modified for improved corrosion resistance. You can read more about carbides and interactions between different elements in this article on carbides. That said, S30V is a great steel! Metallurgy and Testing of Knives and Steel. Notify me of follow-up comments by email. Carbides in steel are often compared to gravel in concrete. Model # SP-C123GPGY . KnifeNews delivers today's news for knife people like us. Makes sense with the logarithmic scale. Thanks to Brad Ettinger, James Henley, and Edgar Candela for becoming Knife Steel Nerds Patreon supporters! The vanadium addition is very small, likely too small to make a contribution to wear resistance and edge retention. $217.00. 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. In an alloy, Tungsten contributes to the harden-ability, and with this much Tungsten it’s no surprise that Spyderco hardened Maxamet up to 67-68 RC. I got good results in heat treating by austenitizing between 1900 and 1950°F for 15 minutes followed by a plate quench and a cryo treatment. 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. The Spyderco Para 3 offers the same great ergonomics of the Paramilitary 2 in a smaller, more urban friendly package. This reduction in toughness was somewhat unexpected because tempered martensite embrittlement is not expected with this tempering temperature in high alloy steels. 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 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. If they make a G10 maxamet I was unaware. And M398 has quite a bit less toughness than that: Adapted from [1][5][6][7][8] So it is apparent that the design of M398 is all about wear resistance and essentially ignores toughness.
2020 maxamet vs m390