There weren’t obvious differences in the microstructure of SPY27 between 2000 and 2050°F, however. S30V – 2000°F. It may be that the reduced carbon content when compared with S35VN leads to superior toughness. Required fields are marked *. Discuss Spyderco's products and history. The toughness is probably a bit better than S35VN. Niobium carbides have also been found to help refine the microstructure of steel. CPM-S30V. The resulting steel is expected to have similar hardness and corrosion resistance to S30V and S35VN. Had a couple scratches on blade and a couple on handle. previously described corrosion resistance test, cobalt addition leading to slightly worse corrosion resistance. $265.00. 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. You can see more ratings in the corrosion resistance article I linked to above. 5 months ago. The S30V sample I tested was austenitized at 2000°F and tempered at 500°F. CPM S30V 10.0 ft. lbs. 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. 1" 1 1/4" 1 1/2" 2" 4" Length. In the previous SPY27 article I predicted that it would have “similar hardness to S35VN, S30V, and S45VN” when heat treating with similar parameters. 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. 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 have an article about SPY27 which I wrote immediately after the announcement of the steel. I will be posting results as they come in to Patreon and articles summarizing the tests will come later to this website. There is also a small nitrogen addition which is made to increase hardness and corrosion resistance, as described in this article. $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. The composition of the steel along with some other in the same class are shown below. Speaking of S45VN, it is somewhat surprising that this steel has been announced so shortly after that steel being announced and released. Yojimbo™ 2 Natural G-10 CPM M4 Exclusive. $168.06. Yojimbo™ 2 G-10 Brown Black Blade CPM S90V Exclusive. I may have to do some more corrosion testing and modify the ratings. The two SPY27 specimens look relatively similar to S30V, and all three are significantly worse than the 420HC. These higher transverse toughness results indicate that CPM S30V is much Native® 5 FRN CPM® SPY27™ ... Para Military™ 2 G-10 Dark Blue CPM S110V. https://www.patreon.com/Knifesteelnerds, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). I heat treated coupons of SPY27 by wrapping the steel in stainless foil to protect against scale and decarburization. The austenitizing temperatures were 1950, 2000, 2050, and 2100°F. Spyderco 2020 Reveal(CPM S45VN, REX45, CPM SPY27 steels) Close. Made from CPM-S30V particle metallurgy stainless steel, the blade is robust with a razor sharp and reliably tough edge. 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. It may be that those larger clusters are the limiting factor for toughness. I’ll probably give it a go in the LW para 3 platform. Become a patron and gain access to awesome rewards including early access to articles or a Knife Steel Nerds mug! The CPM154 was marked at the point somewhere around 20 ft-lbs in your previous chart but now at 5-10 ft-lbs only? Metallurgy and Testing of Knives and Steel. The steel has the same Cr and Mo content as S30V and S35VN. It also appears that SPY27 did somewhat worse than S30V. Contrary to some information available out there, cobalt does not improve toughness or corrosion resistance. SPY27 has similar obtainable hardness to S35VN and similar corrosion resistance to S30V. The carbide structure is explored in the next section. Spyderco: Native 5 Lightweight - Cobalt Blue FRN - Lockback - CPM-SPY27 - C41PCBL5. S30V . I would argue that S30V is better for every practical need. And sharpening is probably a bit easier to S35VN. 18 . ... this one! Employ especially on knives, its abilities to retain edge sharpness and resist rust are superb. However, we can look at the composition and make some educated guesses on its performance which I will do below. MSRP: $175.00. I’m so confused about it since I thought CPM154 is very good at toughness aside from its medium edge retention and corrosion resistance. Spyderco: SpyOpera - Brown Canvas Micarta - Lockback - M390 - C255CMP ... CPM-S30V - C11FPPNS30V. CPM SPY27 steel. At that point very little information was available about the steel other than the composition and that it was produced by Crucible steel. However, there is another proposed explanation which I will cover along with the micrographs below. 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 S30V Stainless Steel Precision Ground. Austenitizing at a higher temperature means more chromium carbide is dissolved putting more chromium “in solution” to contribute to corrosion resistance. S35VN – 1975°F. It's a rare occurrence that we need that level of performance. This is a lucky opportunity since it gives me the chance to see what the properties of the steel really are.
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