maxamet vs m390
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. Few steels can approach this level of hardness while remaining usable in cutlery applications. This thread is archived. Presented by: Work Sharp Knife & Tool Sharpeners Hello everyone! That said, S30V is a great steel! K390 VS M390. $145.00 $101.50. Regarding the vanadium being insufficent for grain refinement. Spyderco’s opinion of the alloy is so favorable the company rushed to release the Maxamet Mule ahead of schedule. Please vote in each of the ten categories... Another classic ESEE fixed blade is getting a variant made from powder metallurgy steel. 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 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. Therefore Nitro-V would be well suited to knives requiring good toughness. SALE* $339.95 $209.95 Para™ 3 G-10 Dark Gray Maxamet. It is not intended for performance improvements and does not refine grain. 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. This shows how good Maxamet is at this one particular thing. 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. 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. 14C28N appears to have somewhat larger carbides than either but is still significantly finer than even many powder metallurgy steels. 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. 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 The steel was then tempered at 300, 350, 400, or 450°F. $140.00. 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. I agree it does depend on one’s definition of slightly. Presented by: Work Sharp Knife & Tool Sharpeners The Mora Eldris LightDuty is the KnifeNews Readers’ Choice for Best New EDC Fixed Blade 2020! Use 1900°F if using a freezer instead of liquid nitrogen. Pitting is particularly a problem in salt water. It also performs well with both coarse and highly polished edges. $175.00. The compositions of the two are similar and the micrographs also look very similar in terms of carbide content. * * * 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. Choose Options. This high-performance alloy offers very high wear and corrosion resistance, yet remains extremely easy to sharpen and maintain. I used 4 specimens for each condition and these were machined by me. Specs: Overall Length: 8.24" (209mm) M390 hardens to 60-62 HRC. Bohler calls this steel “Microclean” and it can be polished to achieve a true mirror. 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. I also have micrographs of AEB-L and 14C28N. The tradeoff is that those steels have much lower toughness than AEB-L and Nitro-V, of course. Presented by: Work Sharp Knife & Tool Sharpeners The Spyderco Nightstick is the KnifeNews Readers’ Choice for Best New Tactical Fixed Blade 2020! Alongside the Maxamet models, Spyderco also announced a new “Zome” edition of the Delica 4 (shown below) and Endura 4. Para™ 3 Lightweight Black Blade. Here are all three below: The white particles are the carbides and the surrounding “matrix” is primarily martensite. 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. I recommend cryogenic processing for maximizing strength when heat treating. I recommend at least going into a household freezer directly after quenching to reduce the retained austenite as much as possible. 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. AEB-L and Nitro-V have a similar volume of carbide, approximately 4-6%. 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. Sort by. The Zome models are already available for purchase at Spyderco’s HQ store, and will be available from other retailers shortly. 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. Model # SP-C255CMP . 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. Nitro-V is a stainless steel sold by New Jersey Steel Baron which was first released in 2017 . You can read about why hardness is limited by retained austenite in this article on Vanax steel. The drawbacks here are, again, sharpenability. $205.00. save hide report. I have previously shared a micrograph of Nitro-V that I took along with 41 other steels. Peter Bruno of New Jersey Steel Baron provided me the following information on the steel: Nitro-V Data. Am I misunderstanding the graph or some other subtlety of metallurgy or is AEB-L really that much tougher? My understanding is that step is to help with grain refinement before ramping to austenizing temperatures. 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. In Stock . 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. Benchmade’s 581 Barrage is an affordable example of M390 performing at its best. Moderately difficult to sharpen, but won’t take you as long as with S90V. 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). 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. The Spyderco Para Military 2 - What more needs to be said? Therefore the corrosion resistance of Nitro-V may be somewhat better than AEB-L depending on the environment. The similar peak hardness of Nitro-V and AEB-L may therefore indicate that the amount of chromium in solution is similar. That means that the 2000°F austenitize likely leads to a decrease in strength and toughness. 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. 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). “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. The 300°F temper led to increased hardness with a reduction in toughness, as expected. Pro-Tech recently put out the first new batch of the Harkins ATAC dual action autos in years. In Stock . Enter your email address to subscribe to this blog and receive notifications of new posts by email. I’m considering using Nitro-V over AEB-L (and 12C27) for the sole reason that it’s available in greater thicknesses. It is significantly tougher than the powder metallurgy stainless steels like M390, Elmax, and S35VN. 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 $295.00. I mostly carry a 154cm M390 or 20cv griptilian and never had a problem. 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. This appears to be significantly, not slightly, tougher. With significant amounts of Chromium, Molybdenum, Vanadium, and Tungsten, these steels are 100% ready for action. 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. $160.00. Although it is officially MT24 (Mule Team 24), it leapfrogged the MT23 to get it into users’ hands faster. Spyderco Para 3 Maxamet, S110V, M390 bonus LT Wright Bushcrafter HC. Para™ 3 G-10 Digital Camo Black Blade. I heat treated the specimens and Mike Pierce kindly machined them for me. So you’ve seen a PM2 before. Peak hardness was achieved at 1950°F, and remained flat to 2000°F. The ParaMilitary 2 has a blade shape, grind, and spine thickness (0.15”) that all comes together in a very simple looking manner. It has slightly lower toughness than AEB-L for unknown reasons. Thank you for the very detailed write up! This significant increase in hardness means that Maxamet will be a very hard-wearing steel with off the charts edge retention. I have cut off the lines where peak hardness was achieved in each. level 1. Nitrogen is not as prone to form nitrides with chromium as carbon is to form carbides. 13C26 is nearly identical to AEB-L but produced by Sandvik. Metallurgy and Testing of Knives and Steel. 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. 100% Upvoted. The higher 2000°F has the same hardness despite the increase in hardness of the martensite because of an increase in retained austenite. CTS-204P is made by the USA-based Carpenter Technology Corporation and CPM-20CV is manufactured by Crucible Industries. Disadvantages: Relatively difficult to sharpen. Yesterday, Spyderco announced that the Maxamet Manix 2 will be available by the end of the month, and the Maxamet Native 5 by the end of the year. 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 Sage 1 Cool Gray G10 Satin Maxamet Liner Lock Folder C123GPGY . Overall the properties of Nitro-V are expected to be similar to AEB-L with perhaps an improvement in corrosion resistance. Nitro-V has a very fine microstructure and very good toughness when compared with other steels. The vanadium addition is very small, likely too small to make a contribution to wear resistance and edge retention. 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. Required fields are marked *. $217.00. 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. 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. Typically such small additions of vanadium are for the purpose of grain refinement in low alloy steels. 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. 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. Nitro-V has a very fine microstructure, with AEB-L possibly being a touch finer. Advantages: Extremely high wear resistance and corrosion resistance. Notify me of follow-up comments by email. 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. Presented by: Work Sharp Knife & Tool Sharpeners Hello and welcome: the Readers’ Choice Awards poll is open – check it out below! However, the high amounts of chromium in stainless steels means that more vanadium is required to contribute to grain refinement. 2) there is more scatter in results at higher values. It's cool to carry a knife made from Maxamet, M390, or CPM-S110V. 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. 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 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. 33% Score (below this is a steel that scores a zero): 187 (33% of Maxamet's 563); closest is 3V at 198. You can read more about the charpy specimens we use here. But grain growth with standard temperatures shouldn’t be an issue. The peak hardness is limited by retained austenite rather than necessarily by how much carbon and nitrogen can be put in solution. KnifeNews delivers today's news for knife people like us. K390 VS Steel . Choose Options. Your email address will not be published.
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