cpm spy27 vs s30v
$329.95. from $34.87. 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. CPM 3V is an American-made steel product by Crucible Industries in Syracuse, New York. There is also a small nitrogen addition which is made to increase hardness and corrosion resistance, as described in this article. 1" 1 1/4" 1 1/2" 2" 4" Length. Yojimbo™ 2 Natural G-10 CPM M4 Exclusive. Spyderco 2020 Reveal(CPM S45VN, REX45, CPM SPY27 steels) Close. The purified water is to test if the steel is acting as a stainless. Thank you for the article Larrin. However, you can still see my predictions in that previous article. You can read more about this in the article on S35VN. For a while CPM-S30V was the top of the line steel. I have an article about SPY27 which I wrote immediately after the announcement of the steel. CPM SPY27 is a steel produced by Crucible exclusively for Spyderco. S30V is, in many eyes, the ultimate EDC steel. The edge retention is likely a small step down from S35VN. All of these specimens included a cryo treatment after quenching before tempering. SPY27, S30V, and 420HC all passed without corrosion after 4 days. The two SPY27 specimens look relatively similar to S30V, and all three are significantly worse than the 420HC. 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. I am not sure if this is due to variability of corrosion testing or not. 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 will be posting results as they come in to Patreon and articles summarizing the tests will come later to this website. 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. Niobium carbides have also been found to help refine the microstructure of steel. 18 . 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. The S30V sample I tested was austenitized at 2000°F and tempered at 500°F. However, there is another proposed explanation which I will cover along with the micrographs below. You can read about cold treatments in these articles: Part 1, Part 2, Part 3. MSRP: $180.00. Para Military™ 2 G-10 Dark Gray Maxamet. Niobium carbide is very hard, similar in hardness to vanadium carbide, so it makes a significant contribution to wear resistance. It sucks its exclusive to spyderco. 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. 440C 2.5 ft. lbs. ; 15.25% of Chromium: For tensile strength and Edge retention, and enhances corrosion resistance and wear resistance. Para Military™ 2 Left Hand G-10 Black. 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. 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. Awesome work, Larrin! How is it related to MAXAMET ?vObviously I understand it is not as hard but what about the overall quality? Some more information on nitrogen additions to these types of PM stainless steels can be found in this article on S45VN. Notify me of follow-up comments by email. The steel is reportedly exclusive to Spyderco. Chris Reeve is famous for developing two steels directly with Crucible Industries, and boy did this partnership result in an awesome product. 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. 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. Notify me of follow-up comments by email. 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. $151.25. $236.00. I have been wanting to see a steel like this made for some time, and it is great to see how it performs. The steel appears to be relatively well balanced and should do well for Spyderco. And it gives everyone else a chance to see whether I am any good at predicting properties of steel based on composition. However, as seen in the micrograph the “carbide clusters” in SPY27 are similar in size to the other steels. The CPM S30V (Which is an acronym for Crucible Particle Metallurgy) is a quality, high endurance steel of American origin. The edge retention is likely a small step down from S35VN. Condition is Used. Enter your email address to subscribe to this blog and receive notifications of new posts by email. ; 9% of Vanadium: Improves wear resistance and hardenability. CPM S30V Stainless Steel Blanchard Ground. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! Your email address will not be published. $310.00. 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. The 1% niobium content may help refine the overall carbide structure when compared with 0% or 0.5% Nb PM stainless steels. I estimated edge retention for a hardness of 61 Rc. 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. 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. CPM SPY27 is a steel produced by Crucible exclusively for Spyderco. Enter your email address to subscribe to this blog and receive notifications of new posts by email. 18. ... this one! 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. It may be that those larger clusters are the limiting factor for toughness. OUT OF STOCK. Despite the reduced carbide content of SPY27 the toughness was similar to S35VN. Austenitizing at a higher temperature means more chromium carbide is dissolved putting more chromium “in solution” to contribute to corrosion resistance. 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 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. The two steels aren’t related really. The composition of the steel along with some other in the same class are shown below. previously described corrosion resistance test, cobalt addition leading to slightly worse corrosion resistance. Metallurgy and Testing of Knives and Steel. You can see more ratings in the corrosion resistance article I linked to above. S35VN had a somewhat reduced vanadium content (3%) in combination with 0.5% niobium. I will have an article on it hopefully in a couple weeks. Unfortunately, I am probably unlikely to get flatstock for experiments due to the steel being exclusive to Spyderco. 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. At that point very little information was available about the steel other than the composition and that it was produced by Crucible steel. It sharpens easier and is cheaper while still having a pretty great edge retention. I compared the toughness results with S30V, S35VN, and S45VN. Hopefully we will be able to learn more as knives are released. Crucible seems to be coming out with more steels lately. The Cr and Mo addition provides corrosion resistance, hardenability, and secondary hardening. Speaking of S45VN, it is somewhat surprising that this steel has been announced so shortly after that steel being announced and released. I then refinished them and started the 1% saltwater test which was 48 hours long. Has been sharpened once and will come razor sharp ... Spyderco Para Millie 2 Liner Lock Knife Black G-10 & CPM-S30V C81GP2. 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. CPM SPY27 Steel. Had a couple scratches on blade and a couple on handle. So far only two stainless steels have failed this test, XHP and ZDP-189. 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). 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. Yojimbo™ 2 Carbon Fiber CPM 20CV Exclusive. ... SPY27 supposedly will be more like S30V/S35Vn. Your email address will not be published. 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. The steel looks somewhat similar to S35VN but with increased Nb and N, decreased C and V, and a 1.5% cobalt addition. 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. ... CPM 20V, and CTS 204P), we would have the differences from different processes at the different mills and possibly different heat treats. I have a new CATRA edge retention testing machine. 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. However, it is also controlled by carbide size and I do not have any micrographs of the new steel. Required fields are marked *. I heat treated coupons of SPY27 by wrapping the steel in stainless foil to protect against scale and decarburization. That’s very interesting. 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. Discuss Spyderco's products and history. MSRP: $175.00. I may have to do some more corrosion testing and modify the ratings. I’m so confused about it since I thought CPM154 is very good at toughness aside from its medium edge retention and corrosion resistance. SPY27 – 2050°F. The MC carbides are harder than most common abrasives apart from diamond and CBN, so lower MC content leads to easier sharpenability. I got a question about the toughness of CPM154 in your chart. A further modification was made to S30V which became S35VN released in 2009. Metallurgy and Testing of Knives and Steel. ; 2.25% of Molybdenum: Increase Machinability and strength. This provides the steel good flexibility, offering easy heat treatment to 60 Rc with commercial heat treating and also higher levels if desired. https://www.patreon.com/Knifesteelnerds, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). So we can understand more the Steel, let’s see its chemical composition. I will be happy with edge performance anywhere in the S30V/Elmax range. I’ll probably give it a go in the LW para 3 platform. Thanks to ShavedAlpaca, giorgi chubinidze, and Сергей Якунин for becoming Knife Steel Nerds Patreon supporters! CPM-S30V. Nash, Matt Collingwood, Noah Cowan, James Pierce, and Jay Caponetti for becoming Knife Steel Nerds Patreon supporters! The vanadium was reduced to 2% relative to S35VN. 154CM 2.5 ft. lbs. S30V – 2000°F. 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. $265.00. Spyderco: Native 5 Lightweight - Cobalt Blue FRN - Lockback - CPM-SPY27 - C41PCBL5. This new design features a slimmer profile so that it feels better in the closed position. Despite its age, it’s a truly superior steel. 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. Free shipping . There is a powder form, CPM-D2, ... Crucible intends SPY27 to be good all-around knife steel. The resulting steel is expected to have similar hardness and corrosion resistance to S30V and S35VN. S45VN – 2000°F. These higher transverse toughness results indicate that CPM S30V is much The Para 3 is Spyderco’s response to a public demand for a more compact, lightweight, and easily concealed military style blade. For that article I predicted the relative performance of the steel based on its composition as no material was available for me to test. And sharpening is probably a bit easier to S35VN. I used carbide contents from Thermo-Calc to estimate CATRA edge retention relative to 440C at 58 Rc (100%). A 300°F temper is usually the minimum temperature I recommend while 400°F usually gives a good balance of hardness and toughness. Each can reach approximately 64 Rc though are generally tempered down to the 58-61 Rc range depending on the manufacturer and heat treatment. Maxamet is a non-stainless high speed steel capable of high hardness. It's a rare occurrence that we need that level of performance. Though it should be a little easier to abrade away steel because of the lower chromium carbide content (M7C3). Although the longitudinal toughness for all three of these grades is about 25-28 ft. The toughness ended up being slightly less than S35VN though at slightly higher hardness so in the end the toughness is equal. In my ratings of knife steel corrosion resistance, 420HC was rated similarly to S30V. 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. It may be that the reduced carbon content when compared with S35VN leads to superior toughness. Sale Price: $126.00. 3/32" 1/8" 5/32" 3/16" Width. Para Military™ 2 G-10 Digital Camo/Black Blade. level 2. $269.95. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! The toughness is probably a bit better than S35VN. I am looking forward to seeing how this steel compares to others once we get some real-world feedback from users. The blade, which is constructed with high performance CPM-S30V, is fully flat ground, making it a breeze to re-sharpen. 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). The resulting steel is expected to have similar hardness and corrosion resistance to S30V and S35VN. The Sebenza 21.  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/.