$329.95. $269.95. Spyderco: Native 5 Lightweight - Cobalt Blue FRN - Lockback - CPM-SPY27 - C41PCBL5. The purified water is to test if the steel is acting as a stainless. This provides the steel good flexibility, offering easy heat treatment to 60 Rc with commercial heat treating and also higher levels if desired. Exhibiting very good edge retention, corrosion resistance, and sharpenability, S30V is utilized by a variety of makers for its performance and balance. Free shipping . Crucible seems to be coming out with more steels lately. Manix 2 Lightweight CPM SPY27. level 2. Below shows heat treatments using liquid nitrogen with S35VN which resulted in relatively similar hardness to the experiments with SPY27 shown above: In the previous SPY27 article I predicted that it would have “similar corrosion resistance to S30V and S35VN.” I used my previously described corrosion resistance test of SPY27 along with S30V and 420HC. However, we can look at the composition and make some educated guesses on its performance which I will do below. The carbide structure is explored in the next section. Spyderco 2020 Reveal(CPM S45VN, REX45, CPM SPY27 steels) Close. I am looking forward to seeing how this steel compares to others once we get some real-world feedback from users. OUT OF STOCK.  https://catalog.spyderco.com/Reveal4/?page=10,  https://forum.spyderco.com/viewtopic.php?f=2&t=85769,  https://www.spyderco.com/edge-u-cation/steel-chart/. I may have to do some more corrosion testing and modify the ratings. The Sebenza 21. Discuss Spyderco's products and history. CPM, makes the steel stronger than the SAME steel made using a conventional steel manufacturing process. spyderco para 3 lightweight Cpm Spy27. Para Military™ 2 Left Hand G-10 Black. The steel has the same Cr and Mo content as S30V and S35VN. ... CPM 20V, and CTS 204P), we would have the differences from different processes at the different mills and possibly different heat treats. Update 3/10/2020: We did a range of experiments with SPY27 to supplement the estimates in this article. It may be that the reduced carbon content when compared with S35VN leads to superior toughness. The second model to come out with the new SPY27 steel is the Manix 2. However, you can still see my predictions in that previous article. Being a little bigger than the Para 3 and utilizing the strong ball bearing locking mechanism and light weight FRCP handles this is sure to be a great knife. The S30V sample I tested was austenitized at 2000°F and tempered at 500°F. The blade, which is constructed with high performance CPM-S30V, is fully flat ground, making it a breeze to re-sharpen. REX 45 will have better edge retention but less corrosion resistance. Maxamet is a non-stainless high speed steel capable of high hardness. I could not tell the difference between the two heat treatments in this case, however. A 300°F temper is usually the minimum temperature I recommend while 400°F usually gives a good balance of hardness and toughness. You can see more ratings in the corrosion resistance article I linked to above. It may be that those larger clusters are the limiting factor for toughness. I have an article about SPY27 which I wrote immediately after the announcement of the steel. Yojimbo™ 2 Carbon Fiber CPM 20CV Exclusive. 440C 2.5 ft. lbs. The MC carbides are harder than most common abrasives apart from diamond and CBN, so lower MC content leads to easier sharpenability. The toughness ended up being slightly less than S35VN though at slightly higher hardness so in the end the toughness is equal. The steel appears to be relatively well balanced and should do well for Spyderco. For a while CPM-S30V was the top of the line steel. Niobium carbide is very hard, similar in hardness to vanadium carbide, so it makes a significant contribution to wear resistance. Required fields are marked *. CPM SPY27 steel. Here’s what Buck Knives says about S30V: “We consider this the absolute best blade steel available, and it is made in America.” Para Military™ 2 G-10 Digital Camo/Black Blade. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! S35VN – 1975°F. You can read about cold treatments in these articles: Part 1, Part 2, Part 3. Thank you for the article Larrin. CPM S30V Stainless Steel Blanchard Ground. 18. ; 2.25% of Molybdenum: Increase Machinability and strength. 36 . And it gives everyone else a chance to see whether I am any good at predicting properties of steel based on composition. Despite the reduced carbide content of SPY27 the toughness was similar to S35VN. I have been wanting to see a steel like this made for some time, and it is great to see how it performs. Sale Price: $126.00. Spyderco: SpyOpera - Brown Canvas Micarta - Lockback - M390 - C255CMP ... CPM-S30V - C11FPPNS30V. At that point very little information was available about the steel other than the composition and that it was produced by Crucible steel. The test involves heat treating steel, finishing it to 400 grit, and then spraying it every 8 hours either with purified water or 1% saltwater. Great breakdown Larrin. In the previous SPY27 article I predicted that it would have “similar hardness to S35VN, S30V, and S45VN” when heat treating with similar parameters. The vanadium was reduced to 2% relative to S35VN. This change led to a finer carbide structure and better toughness and machinability than S30V at the cost of a small reduction in edge retention. On January 15, 2020 Spyderco announced  knives being produced in a new steel: CPM SPY27, a steel produced by Crucible. The SPY refers to Spyderco and 27 is the atomic number of cobalt . S35VN had a somewhat reduced vanadium content (3%) in combination with 0.5% niobium. Shipped with USPS First Class. Based on the predicted alloy in solution for SPY27 it should have similar corrosion resistance to S30V and S35VN. ... this one! MSRP: $175.00. It's a rare occurrence that we need that level of performance. $236.00. Hopefully we will be able to learn more as knives are released. The steel is reportedly exclusive to Spyderco. S30V . The CPM S30V (Which is an acronym for Crucible Particle Metallurgy) is a quality, high endurance steel of American origin. Sale Price: $122.50. The edge retention of SPY27 is expected to be a bit below S35VN, similar to Super Gold 2, though higher than steels like VG10, 440C, and CPM-154. According to the chemical composition and the HRC of the steel, the CPM s90v Steel has the following features: CPM s90v Edge Retention: With a high presence of vanadium and carbon, s90v steel offers extreme edge retention (might be the best in the steel). There is also a small nitrogen addition which is made to increase hardness and corrosion resistance, as described in this article. You can see my corrosion resistance rating in the table below: This is a pretty decent corrosion resistance, similar to Elmax (7.8), but is below steels like S45VN (8.4), M390 (9.1), and Vanax (10). I don’t have a good quantitative test for finishing or sharpening and I have not yet performed any edge retention experiments. ; 9% of Vanadium: Improves wear resistance and hardenability. Has been sharpened once and will come razor sharp ... Spyderco Para Millie 2 Liner Lock Knife Black G-10 & CPM-S30V C81GP2. Metallurgy and Testing of Knives and Steel. lbs., the transverse toughness of CPM S30V is four times greater than that of 440C or 154CM. You can read about edge retention and predicting it based on carbide content and hardness here. The two steels aren’t related really. The premium steel boasts some of the best qualities of a good knife steel: it has great edge retention, solid corrosion resistance, and average ease of sharpening. The austenitizing temperatures were 1950, 2000, 2050, and 2100°F. Although the longitudinal toughness for all three of these grades is about 25-28 ft. Yojimbo™ 2 Natural G-10 CPM M4 Exclusive. However, I think the toughness of S30V could be further improved with better heat treating, if we use what we learned with heat treating S35VN, S45VN, and SPY27. The composition  is as follows: I don’t have any of the steel for analysis, and given it is exclusive to Spyderco I may not be able to get any. Required fields are marked *. In the article on S45VN, I found that austenitizing at 2000°F led to a finer microstructure than 1950°F. CPM-S30V. ; 15.25% of Chromium: For tensile strength and Edge retention, and enhances corrosion resistance and wear resistance. So I was right that the toughness is “at least as good as S35VN” but the “probably better” was a bit too strong. CPM-S30V has become one of the most used premium steels on the market among knife manufacturers. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Both S30V and S35VN steel are made with the same carbon and chrome content, and from various tests, both steels provide the same edge retention and corrosion resistance. The steel looks somewhat similar to S35VN but with increased Nb and N, decreased C and V, and a 1.5% cobalt addition. Therefore I would expect SPY27 to have toughness at least as good as S35VN and probably better, but that would have to be confirmed experimentally. Though it should be a little easier to abrade away steel because of the lower chromium carbide content (M7C3). I will be posting results as they come in to Patreon and articles summarizing the tests will come later to this website. The toughness is probably a bit better than S35VN. The steel is capable of relatively high hardness, reaching over 65 Rc “as-quenched” before tempering, and nearly 64 Rc even without a cold treatment. See the edge retention prediction chart to see the expected carbide volume of SPY27 which came in under S35VN, S30V, S45VN, and Super Gold 2, and is also lower than Elmax and M390 which are not shown in the table. Notify me of follow-up comments by email. Here is a chart of other steels to compare with S35VN: With similar MC carbide content (NbC + VC) to S35VN and S45VN, SPY27 which be expected to sharpen similar to those two steels. You can read more about this in the article on S35VN. To see how common the clusters of carbides are I have a lower magnification image of SPY27 below: I also gave some estimates of edge retention, finishing, and sharpening of SPY27. 18 . The cobalt addition increases secondary hardening when tempering in the upper temperature range, which I have written about previously here and here. Employ especially on knives, its abilities to retain edge sharpness and resist rust are superb. It is always interesting to see what the numbers predict and it will be cool to see how they play out once you get some to do some real in hand testing. The composition of the steel along with some other in the same class are shown below. SPY27 – 2050°F. https://www.patreon.com/Knifesteelnerds, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). How is it related to MAXAMET ?vObviously I understand it is not as hard but what about the overall quality? 154CM 2.5 ft. lbs. As I said in the article, “I am probably unlikely to get flatstock for experiments due to the steel being exclusive to Spyderco.” However, after publishing I was contacted by Niagara Specialty Metals (company that hot rolls Crucible steels) and Spyderco offering me some steel for experiments. Qty. Niobium carbides have also been found to help refine the microstructure of steel. Despite its age, it’s a truly superior steel. So I have spent the past couple months looking at the heat treating and toughness of CPM-154. $217.95. 1" 1 1/4" 1 1/2" 2" 4" Length. I estimated edge retention for a hardness of 61 Rc. $168.06. Experimental results of SPY27 line up well with the previously provided predictions. Metallurgy and Testing of Knives and Steel. I have a new CATRA edge retention testing machine. SPY27 has similar obtainable hardness to S35VN and similar corrosion resistance to S30V. It may be that without reducing the chromium carbide content to much lower levels that the toughness remains limited to about 10-12 ft-lbs as is seen with many of these stainless PM steels like Elmax, M390, CPM-154, S35VN, S30V, SG2, etc. CPM S110V Steel Chemical composition . There are a couple studies that found a cobalt addition leading to slightly worse corrosion resistance but I’m not sure if this SPY27 study is conclusive enough to confirm that. 3/32" 1/8" 5/32" 3/16" Width. Your email address will not be published. CPM SPY27 is a steel produced by Crucible exclusively for Spyderco. CPM S30V Stainless Steel Precision Ground. You can read more about niobium in this article. https://www.patreon.com/Knifesteelnerds, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). The resulting steel is expected to have similar hardness and corrosion resistance to S30V and S35VN. Made from CPM-S30V particle metallurgy stainless steel, the blade is robust with a razor sharp and reliably tough edge. I have shown the 2050°F specimen below, along with comparisons with S30V, S35VN, and S45VN where you can see that SPY27 has somewhat less carbide than the others. The S35VN or CPM S35V is a high-end martensitic stainless steel made by @Crucible, high in Carbon, Vanadium, and chromium designed to offer a great balance between toughness, hardness and corrosion resistance.It’s used in long-wearing Specialty cutlery, Plastic Injection and Extrusion Feed Screws and Dies, Wear Components for Food and Chemical Processing, and of course in the Knife Industry. In my ratings of knife steel corrosion resistance, 420HC was rated similarly to S30V. Chris Reeve is famous for developing two steels directly with Crucible Industries, and boy did this partnership result in an awesome product. In the previous SPY27 article I said, “I would expect SPY27 to have toughness at least as good as S35VN and probably better, but that would have to be confirmed experimentally.” I tested toughness by austenitizing the steel at 2000 or 2050°F and then tempering at 400°F. Exclusive Steel: Spyderco Native 5 With SPY27 Knife Review – Now Reviews Hub, Exclusive Steel: Spyderco Native 5 With SPY27 Knife Review | GearJunkie - GARDEN OUTDOOR PRESS, Exclusive Steel: Spyderco Native 5 With SPY27 Knife Review – Nowhere Bound Company. I would argue that S30V is better for every practical need. Here are some experimental results of different steels for CATRA slicing edge retention to get a feel for where SPY27 may sit: Toughness of steel can be difficult to predict based only on composition or carbide content. $151.25. I will have an article on it hopefully in a couple weeks. Martensitic is a specific type of stainless steel alloy. Your email address will not be published. The Cr and Mo addition provides corrosion resistance, hardenability, and secondary hardening. CPM 3V is an American-made steel product by Crucible Industries in Syracuse, New York. I performed two heat treatments with SPY27, one austenitizing at 1950°F and another at 2050°F. The Nb content was bumped up to 1% from the 0.5% of S35VN and S45VN which will of course increase the amount of niobium carbide. I used carbide contents from Thermo-Calc to estimate CATRA edge retention relative to 440C at 58 Rc (100%). The steel can be heat treated over 64 Rc with a liquid nitrogen treatment and a 300°F temper and a range of lower hardness levels with different combinations of parameters. I then refinished them and started the 1% saltwater test which was 48 hours long. CPM S30V 10.0 ft. lbs. There is a powder form, CPM-D2, ... Crucible intends SPY27 to be good all-around knife steel. So far only two stainless steels have failed this test, XHP and ZDP-189. In the article on cobalt additions I wrote, I noted that cobalt additions to high speed steels have been known to reduce toughness which may mean that even if the toughness was improved due to reduced carbide, it may be that the cobalt addition reduced toughness back down to the level of S35VN. However, as seen in the micrograph the “carbide clusters” in SPY27 are similar in size to the other steels. Yojimbo™ 2 G-10 Brown Black Blade CPM S90V Exclusive. However, there is another proposed explanation which I will cover along with the micrographs below. I will be happy with edge performance anywhere in the S30V/Elmax range. However, as seen in the micrograph the “carbide clusters” in SPY27 are similar in size to the other steels. from $34.87. I have previously performed corrosion resistance experiments and related it to predicted chromium and other alloying elements “in solution,” as you can read here. I austenitized the steel at different temperatures for 20 minutes and quenched between two 1″ aluminum plates which provides faster cooling rates than holding in air and also helps keeps specimens flat. The two SPY27 specimens look relatively similar to S30V, and all three are significantly worse than the 420HC. The steel looks somewhat similar to S35VN but with increased Nb and N, decreased C and V, and a 1.5% cobalt addition. You can also see that the trend for this class of steels is to have improved toughness with higher hardening temperatures, at least up to 2050°F. Para Military™ 2 G-10 Dark Gray Maxamet. A further modification was made to S30V which became S35VN released in 2009. CPM SPY27 is a steel produced by Crucible exclusively for Spyderco. Had a couple scratches on blade and a couple on handle. I expected the toughness to be better because of the reduced carbon and carbide content when compared with S35VN. If you want to see tests as they are completed come join us on Patreon. For that article I predicted the relative performance of the steel based on its composition as no material was available for me to test. These higher transverse toughness results indicate that CPM S30V is much SPY27 is expected to have slightly less edge retention than S35VN and to sharpen similarly or slightly better. And sharpening is probably a bit easier to S35VN. Thanks to A.N. Awesome work, Larrin! I’ll probably give it a go in the LW para 3 platform. So we can understand more the Steel, let’s see its chemical composition. Despite the reduced carbide content of SPY27 the toughness was similar to S35VN. I got a question about the toughness of CPM154 in your chart. Each can reach approximately 64 Rc though are generally tempered down to the 58-61 Rc range depending on the manufacturer and heat treatment. $104.95. It also appears that SPY27 did somewhat worse than S30V. Do a through test on 420 hc buck basic cryo hardened steel at there treatment level …corrosion,hardness .edge retention .most people need 420hc cryo because average people can’t sharpen good thanks, Your email address will not be published. Condition is Used. Your email address will not be published. The toughness is very close to S35VN. Contrary to some information available out there, cobalt does not improve toughness or corrosion resistance. Austenitizing at a higher temperature means more chromium carbide is dissolved putting more chromium “in solution” to contribute to corrosion resistance. Para Military™ 2 G-10 Digital Camo. I compared the toughness results with S30V, S35VN, and S45VN. I then tempered specimens twice for two hours each time at 300, 400, and 600°F and plotted out the resulting hardness. I heat treated coupons of SPY27 by wrapping the steel in stainless foil to protect against scale and decarburization. Speaking of S45VN, it is somewhat surprising that this steel has been announced so shortly after that steel being announced and released. Nash, Matt Collingwood, Noah Cowan, James Pierce, and Jay Caponetti for becoming Knife Steel Nerds Patreon supporters! The S30V and 420HC were also austenitized at 1950°F. $216.00. It may be that those larger clusters are the limiting factor for toughness. After quenching, one third of the specimens were left at room temperature, another third of the specimens were placed in my freezer (a normal household basement variety), and the final third were placed in liquid nitrogen for a cryo treatment. All of these specimens included a cryo treatment after quenching before tempering. Native® 5 FRN CPM® SPY27™ ... Para Military™ 2 G-10 Dark Blue CPM S110V. 5 months ago. S90V has a better edge retention but let's all be honest, edge retention for most of us is just numbers on a piece of paper. $265.00. The edge retention is likely a small step down from S35VN. 2.8% of Carbon: It improves hardness and wear/corrosion resistance, but a high amount of it decreases strength. SPY27 and S30V have “good” or “above average” corrosion resistance but cannot match 420HC. Native® 5 FRN CPM® SPY27™ ... UK Penknife™ Red G-10 CPM S30V Exclusive. ... SPY27 supposedly will be more like S30V/S35Vn. The CPM154 was marked at the point somewhere around 20 ft-lbs in your previous chart but now at 5-10 ft-lbs only? You can read those experiments here. There weren’t obvious differences in the microstructure of SPY27 between 2000 and 2050°F, however. I am not sure if this is due to variability of corrosion testing or not. Thanks to ShavedAlpaca, giorgi chubinidze, and Сергей Якунин for becoming Knife Steel Nerds Patreon supporters! previously described corrosion resistance test, cobalt addition leading to slightly worse corrosion resistance. The microstructure confirms somewhat reduced carbide content relative to S35VN, S30V, and S45VN. S30V – 2000°F. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! Notify me of follow-up comments by email. By Larry Connelley When looking at quality American-made knives, you'll notice that S35VN and S30V steel are two of the more popular steels for knife blades. The resulting steel is expected to have similar hardness and corrosion resistance to S30V and S35VN. The carbon content is of SPY27 is balanced to result in a similar hardness to S35VN, S30V, and S45VN, as indicated by carbon in solution estimates from Thermo-Calc: Therefore we would expect the steel to reach a similar hardness to those other CPM stainless steels. Quick View Thickness. OUT OF STOCK. However, it is also controlled by carbide size and I do not have any micrographs of the new steel. In general, lower carbide volume means higher toughness. The Para 3 is Spyderco’s response to a public demand for a more compact, lightweight, and easily concealed military style blade. 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.. The ease or difficulty in burr removal would be more based on the heat treatment, particularly when it comes to retained austenite, as lower retained austenite makes burr removal easier. I’m so confused about it since I thought CPM154 is very good at toughness aside from its medium edge retention and corrosion resistance. The 1% niobium content may help refine the overall carbide structure when compared with 0% or 0.5% Nb PM stainless steels. S45VN – 2000°F. This is a lucky opportunity since it gives me the chance to see what the properties of the steel really are. Unfortunately, I am probably unlikely to get flatstock for experiments due to the steel being exclusive to Spyderco. CPM is a trademarked name for a process that is also called Powdered Metallurgy or PM steel. The compression lock is easy to unlock with a single hand and has a four way clip which will carry in any position that is desired. The Para 3 Lightweight and Manix 2 Lightweight will be the first two models to feature CPM SPY27 blade steel. S30V is, in many eyes, the ultimate EDC steel. I took micrographs of the steel that tested for toughness, which means the heat treatments were 2000 or 2050°F austenitize, plate quench, cryo, and tempered at 400°F. The more steels and heat treatments we have added to the toughness chart the more that value of CPM-154 has looked out of place. SPY27, S30V, and 420HC all passed without corrosion after 4 days. That’s very interesting. MSRP: $180.00. Enter your email address to subscribe to this blog and receive notifications of new posts by email. CPM SPY27 Steel. I'm curious about that Spy27 steel and the Rex45! The edge retention is likely a small step down from S35VN. $216.00. Posted by. Some more information on nitrogen additions to these types of PM stainless steels can be found in this article on S45VN. $310.00. Originally developed by both Chris Reeve (a world renowned knife maker) and Dick Barber of Crucible Industries, S30V is a martensitic powder-made stainless steel. This new design features a slimmer profile so that it feels better in the closed position. It sucks its exclusive to spyderco. It sharpens easier and is cheaper while still having a pretty great edge retention.
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