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2 Dec

cpm spy27 vs s30v

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The Para 3 Lightweight and Manix 2 Lightweight will be the first two models to feature CPM SPY27 blade steel. The resulting steel is expected to have similar hardness and corrosion resistance to S30V and S35VN. I am not sure if this is due to variability of corrosion testing or not. $216.00. Each can reach approximately 64 Rc though are generally tempered down to the 58-61 Rc range depending on the manufacturer and heat treatment. Thank you for the article Larrin. You can read more about this in the article on S35VN. S45VN – 2000°F. The edge retention is likely a small step down from S35VN. Based on the predicted alloy in solution for SPY27 it should have similar corrosion resistance to S30V and S35VN. $216.00. $151.25. 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. It's a rare occurrence that we need that level of performance. 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. Despite the reduced carbide content of SPY27 the toughness was similar to S35VN. CPM S30V 10.0 ft. lbs. You can read about edge retention and predicting it based on carbide content and hardness here. OUT OF STOCK. Yojimbo™ 2 G-10 Brown Black Blade CPM S90V Exclusive. 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. CPM is a trademarked name for a process that is also called Powdered Metallurgy or PM steel. Metallurgy and Testing of Knives and Steel. MSRP: $180.00. I would argue that S30V is better for every practical need. 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. 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. A further modification was made to S30V which became S35VN released in 2009. Para Military™ 2 G-10 Digital Camo. 440C 2.5 ft. lbs. Despite its age, it’s a truly superior steel. Made from CPM-S30V particle metallurgy stainless steel, the blade is robust with a razor sharp and reliably tough edge. ; 2.25% of Molybdenum: Increase Machinability and strength. Native® 5 FRN CPM® SPY27™ ... Para Military™ 2 G-10 Dark Blue CPM S110V. Required fields are marked *. ... CPM 20V, and CTS 204P), we would have the differences from different processes at the different mills and possibly different heat treats. SPY27 has similar obtainable hardness to S35VN and similar corrosion resistance to S30V. However, we can look at the composition and make some educated guesses on its performance which I will do below. Shipped with USPS First Class. spyderco para 3 lightweight Cpm Spy27. The 1% niobium content may help refine the overall carbide structure when compared with 0% or 0.5% Nb PM stainless steels. The steel has the same Cr and Mo content as S30V and S35VN. And it gives everyone else a chance to see whether I am any good at predicting properties of steel based on composition. CPM S30V Stainless Steel Precision Ground. It may be that those larger clusters are the limiting factor for toughness. ... SPY27 supposedly will be more like S30V/S35Vn. The S30V and 420HC were also austenitized at 1950°F. 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. Condition is Used. ; 15.25% of Chromium: For tensile strength and Edge retention, and enhances corrosion resistance and wear resistance. from $34.87. I could not tell the difference between the two heat treatments in this case, however. https://www.patreon.com/Knifesteelnerds, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). Exhibiting very good edge retention, corrosion resistance, and sharpenability, S30V is utilized by a variety of makers for its performance and balance. 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 performed two heat treatments with SPY27, one austenitizing at 1950°F and another at 2050°F. 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. The S30V sample I tested was austenitized at 2000°F and tempered at 500°F. The two SPY27 specimens look relatively similar to S30V, and all three are significantly worse than the 420HC. Manix 2 Lightweight CPM SPY27. The vanadium was reduced to 2% relative to S35VN. Sale Price: $122.50. The carbide structure is explored in the next section. Notify me of follow-up comments by email. I will have an article on it hopefully in a couple weeks. I will be happy with edge performance anywhere in the S30V/Elmax range. I have an article about SPY27 which I wrote immediately after the announcement of the steel. The blade, which is constructed with high performance CPM-S30V, is fully flat ground, making it a breeze to re-sharpen. Spyderco: Native 5 Lightweight - Cobalt Blue FRN - Lockback - CPM-SPY27 - C41PCBL5. $104.95. 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. 3/32" 1/8" 5/32" 3/16" Width. 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. 154CM 2.5 ft. lbs. Although the longitudinal toughness for all three of these grades is about 25-28 ft. CPM 3V is an American-made steel product by Crucible Industries in Syracuse, New York. Native® 5 FRN CPM® SPY27™ ... UK Penknife™ Red G-10 CPM S30V Exclusive. I compared the toughness results with S30V, S35VN, and S45VN. Unfortunately, I am probably unlikely to get flatstock for experiments due to the steel being exclusive to Spyderco. Nash, Matt Collingwood, Noah Cowan, James Pierce, and Jay Caponetti for becoming Knife Steel Nerds Patreon supporters! The toughness is very close to S35VN. 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. $236.00. SPY27 is expected to have slightly less edge retention than S35VN and to sharpen similarly or slightly better. However, as seen in the micrograph the “carbide clusters” in SPY27 are similar in size to the other steels. You can read about cold treatments in these articles: Part 1, Part 2, Part 3. Has been sharpened once and will come razor sharp ... Spyderco Para Millie 2 Liner Lock Knife Black G-10 & CPM-S30V C81GP2. I expected the toughness to be better because of the reduced carbon and carbide content when compared with S35VN. $310.00. For that article I predicted the relative performance of the steel based on its composition as no material was available for me to test. REX 45 will have better edge retention but less corrosion resistance. Quick View Thickness. [1] https://catalog.spyderco.com/Reveal4/?page=10, [2] https://forum.spyderco.com/viewtopic.php?f=2&t=85769, [3] https://www.spyderco.com/edge-u-cation/steel-chart/. 18 . Free shipping .  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. 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. Sale Price: $126.00. ; 9% of Vanadium: Improves wear resistance and hardenability. However, it is also controlled by carbide size and I do not have any micrographs of the new steel. 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. I will be posting results as they come in to Patreon and articles summarizing the tests will come later to this website. 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 steel looks somewhat similar to S35VN but with increased Nb and N, decreased C and V, and a 1.5% cobalt addition. 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. Thanks to ShavedAlpaca, giorgi chubinidze, and Сергей Якунин for becoming Knife Steel Nerds Patreon supporters! 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.. There is also a small nitrogen addition which is made to increase hardness and corrosion resistance, as described in this article. CPM S110V Steel Chemical composition . 1" 1 1/4" 1 1/2" 2" 4" Length. 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. However, you can still see my predictions in that previous article. Hopefully we will be able to learn more as knives are released. Chris Reeve is famous for developing two steels directly with Crucible Industries, and boy did this partnership result in an awesome product. In my ratings of knife steel corrosion resistance, 420HC was rated similarly to S30V. The CPM154 was marked at the point somewhere around 20 ft-lbs in your previous chart but now at 5-10 ft-lbs only?

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