maxamet vs m390

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. 100% Upvoted. 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. The peak hardness is limited by retained austenite rather than necessarily by how much carbon and nitrogen can be put in solution. Thanks to Brad Ettinger, James Henley, and Edgar Candela for becoming Knife Steel Nerds Patreon supporters! The compositions of the two are similar and the micrographs also look very similar in terms of carbide content. New comments cannot be posted and votes cannot be cast. 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. If you are interested in trying out Maxamet but can’t wait for the Manix or Native, the MT24 is still available for purchase. 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. $295.00. Notify me of follow-up comments by email. KnifeNews delivers today's news for knife people like us. In Stock . Retained austenite in the right amounts can sometimes improve toughness. 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 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. Peter Bruno of New Jersey Steel Baron provided me the following information on the steel: Nitro-V Data. * * * 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. Typically such small additions of vanadium are for the purpose of grain refinement in low alloy steels. So nitrogen can sometimes be added for improved hardness without a sacrifice in corrosion resistance. Alongside the Maxamet models, Spyderco also announced a new “Zome” edition of the Delica 4 (shown below) and Endura 4. Maxamet’s distinguishing metallurgical characteristic is the high carbon content (2.15%) and the inclusion of 10% Tungsten. 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 Disadvantages: Relatively difficult to sharpen. Made by Bohler in Austria. Unfortunately here “down under” AEB-L is unavailable and even 12C27 only comes in thin stock. $290.00 $203.00. Here are all three below: The white particles are the carbides and the surrounding “matrix” is primarily martensite. 14C28N appears to have somewhat larger carbides than either but is still significantly finer than even many powder metallurgy steels. 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. Presented by: Work Sharp Knife & Tool Sharpeners Hello everyone! 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. 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). Spyderco Para 3 Maxamet, S110V, M390 bonus LT Wright Bushcrafter HC. > > Keep your folders awesome. This appears to be significantly, not slightly, tougher. 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. More testing needs to be done in terms of corrosion resistance and edge retention to confirm the steel behaves in the expected range I proposed based on its composition and microstructure. You can read about why hardness is limited by retained austenite in this article on Vanax steel. Presented by: Work Sharp Knife & Tool Sharpeners The Spyderco Nightstick is the KnifeNews Readers’ Choice for Best New Tactical Fixed Blade 2020! 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. I agree it does depend on one’s definition of slightly. 13C26 is nearly identical to AEB-L but produced by Sandvik. Maxamet is not stainless and requires proper maintenance to prevent rust and corrosion. Spyderco Para Military 2 Knife. $145.00 $101.50. $205.00. M390. You can read about those limits in this article on nitrogen additions. While there are some parallels, such an improving wear resistance, the analogy fails in the prediction that carbides can "pop out" of the matrix. level 1. 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. Therefore the vanadium is likely doing very little in Nitro-V. Like other stainless steels Nitro-V has high hardenability so it can be cooled in air or plate quenched for hardness. Presented by: Work Sharp Knife & Tool Sharpeners The Mora Eldris LightDuty is the KnifeNews Readers’ Choice for Best New EDC Fixed Blade 2020! The steel was designed and produced in collaboration with Buderus Steel as a version of Uddeholm AEB-L modified with nitrogen and vanadium. The similar peak hardness of Nitro-V and AEB-L may therefore indicate that the amount of chromium in solution is similar. I used 4 specimens for each condition and these were machined by me. It has slightly lower toughness than AEB-L for unknown reasons. Model # SP-C123GPGY . I recommend at least going into a household freezer directly after quenching to reduce the retained austenite as much as possible. SALE* $339.95 $209.95 Nitrogen is not as prone to form nitrides with chromium as carbon is to form carbides. K390 VS Steel . Nice work. $140.00. I have cut off the lines where peak hardness was achieved in each. Para™ 3 G-10 Digital Camo Black Blade. 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. share. Worn concrete sidewalk with exposed gravel. Therefore the corrosion resistance of Nitro-V may be somewhat better than AEB-L depending on the environment. I also have micrographs of AEB-L and 14C28N. You can read more about carbides and interactions between different elements in this article on carbides. Maxamet’s distinguishing metallurgical characteristic is the high carbon content (2.15%) and the inclusion of 10% Tungsten. This shows how good Maxamet is at this one particular thing. 2) there is more scatter in results at higher values. Para™ 3 Lightweight. 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 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. Specs: Overall Length: 8.24" (209mm) We are all familiar with the surface voids produced in concrete when a stone from… This high-performance alloy offers very high wear and corrosion resistance, yet remains extremely easy to sharpen and maintain. Until Spyderco’s announcement, the Zero Tolerance ZT0888MAX was the only production knife made with Maxamet steel, and only 250 units were ever produced. Pro-Tech recently put out the first new batch of the Harkins ATAC dual action autos in years. You can read more about cryo here: Part 1, Part 2, and Part 3. 26 comments. You can read more about the charpy specimens we use here. The vanadium addition is very small, likely too small to make a contribution to wear resistance and edge retention. 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. I don’t know if a 400°F temper would see similar results. 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 … Bohler M390, CTS-204P, and CPM-20CV are all essentially the same steel and sport a near identical composition. 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. So you’ve seen a PM2 before. 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 … The superior edge retention also doesn’t come without drawbacks. 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. This significant increase in hardness means that Maxamet will be a very hard-wearing steel with off the charts edge retention. Metallurgy and Testing of Knives and Steel. 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. 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. In Stock . You can read more about the history of AEB-L, 13C26, and 14C28N in this article. AEB-L and Nitro-V have a similar volume of carbide, approximately 4-6%. The ParaMilitary 2 has a blade shape, grind, and spine thickness (0.15”) that all comes together in a very simple looking manner. 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. Nitro-V has very good toughness compared with other steels. 66% Score (below this but above 33% is a steel that scores a 1): 372 (66% of Maxamet's 563); CPM 10V at 389. No price has been announced for either the Maxamet Manix 2 or Native 5. $175.00. $217.00. A 450°F temper led to an unexpected reduction in toughness. The 300°F temper led to increased hardness with a reduction in toughness, as expected. 33% Score (below this is a steel that scores a zero): 187 (33% of Maxamet's 563); closest is 3V at 198. Am I misunderstanding the graph or some other subtlety of metallurgy or is AEB-L really that much tougher? 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. Choose Options. CTS-XHP —A stainless, powdered steel from Carpenter that is becoming more popular with some knife companies and makers. But grain growth with standard temperatures shouldn’t be an issue. 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. Both ThermoCalc and JMatPro predict that no vanadium carbide is present at typical heat treating and forging temperatures. However there are a couple things that led me to make that statement: 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). Spyderco C101PGY2 Manix 2 Lightweight, 3.38" Maxamet Steel Plain Blade, Stone Gray FRN Handle. If they make a G10 maxamet I was unaware. https://www.patreon.com/Knifesteelnerds, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). 63-64 HRC. I heat treated the specimens and Mike Pierce kindly machined them for me. Spyderco’s opinion of the alloy is so favorable the company rushed to release the Maxamet Mule ahead of schedule. Doug Ritter RSK® MK1-G2 Knifeworks Exclusive - Black / Stonewashed. Model # SP-C255CMP . Benchmade’s 581 Barrage is an affordable example of M390 performing at its best. It's cool to carry a knife made from Maxamet, M390, or CPM-S110V. Para™ 3 G-10 Digital Camo. Thank you for the very detailed write up! But I can’t recommend tempering higher than 350°F right now because I don’t know where the reduction in toughness takes place. Zome is a traditional Japanese dyeing technique, and the Seki-City facility has adapted this process for the Delica and Endura production processes. 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 AEB-L has edge retention similar to 52100, which is significantly lower than higher carbide content stainless steels like 440C, CPM-154, S30V, etc. My understanding is that step is to help with grain refinement before ramping to austenizing temperatures. Nitro-V is a stainless steel sold by New Jersey Steel Baron which was first released in 2017 [1]. 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. 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. The blade of this remarkable knife is crafted from Böhler-Uddeholm M390 particle metallurgy stainless steel. That said, S30V is a great steel! Use 1900°F if using a freezer instead of liquid nitrogen. Does that mean the process recommended above skips the pre-heat/equalizing (15min hold at 1500F) step in NJSB’s own heat treating guide? MSRP for the Zome Delica 4 and Endura 4 is $109.95 and $114.95, respectively. 2) there is more scatter in results at higher values. 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. Your email address will not be published. That said, S30V is a great steel! Para™ 3 Lightweight Black Blade. 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. 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. CTS-204P is made by the USA-based Carpenter Technology Corporation and CPM-20CV is manufactured by Crucible Industries. 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. 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. With significant amounts of Chromium, Molybdenum, Vanadium, and Tungsten, these steels are 100% ready for action.

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