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cpm s45vn vs s30v

In late 2019, Crucible industries in collaboration with Niagra Speciality Metals debuted CPM S45VN. 4% S45VN. Molybdenum improves corrosion resistance, as mentioned earlier in connection with 154CM. This was also confirmed in my own corrosion resistance testing, where a higher rating below means better resistance to corrosion. As seen in the formula composition, S45VN has a higher chromium content as compared to the S35VN. The toughness of S30V is similar to other stainless steels in its class according to my own toughness experiments, though not record-setting, as seen in our standard toughness test utilizing unnotched 1/4 size charpy specimens: 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. Metallurgy and Testing of Knives and Steel. The increase in Mo from 1% in S90V up to 2% in S30V provided an increase in corrosion resistance with the relatively low 14% Cr. Powder metallurgy allowed higher alloy steels and finer microstructures because of the rapid solidification process. Freeman mentioned, “Not a knock on any other CPM steels, but so far this seems "cleaner", meaning that it gives a very uniform surface appearance across a large surface area. ... Spyderco Para 3 Sprint Run-Diamond Arc Text Forest Green G-10-CPM-S45VN. S60V, however, was essentially 440C but with 5.5% vanadium added and enough carbon to maintain similar hardness potential. Nitrogen was added in place of carbon and niobium increased in place of vanadium to improve corrosion resistance present in S35NV.Edge Retention Winkler Highland Hatchet - Curly Oak Tomahawk, Chris Reeve Large Sebenza 21 Tanto - Micarta Inlay Folding Knife, Kurt Merriken Custom 3" Phantom San Mai Damascus, Brian Tighe - Tighe Down Integral - RWL34 & Carbon Fiber Inlay, Hinderer Extreme Duty Pen Copper - EDP Tactical Pen, Tuff Writer Precision Press Flamed Titanium Tactical Pen, Download the Crudible CPM S45VN Steel Datasheet. UK Penknife™ Red G-10 CPM S30V Exclusive. Chris said that if Crucible made something better they would buy it. [2] Haswell, Walter T., and August Kasak. Nitrogen can increase hardness and corrosion resistance in stainless steels, read more here. Modifications of S30V led to the development of the also popular S35VN, and the more recent S45VN. CPM = Cruidible Powder Metallurgy Powder steel is a technology that was invented to allow the … S35VN, which is the mainstream steel, contains lower components of niobium and lacks nitrogen, which is added to S45VN to increase toughness. As described in the S45VN article, nitrogen also decreases the chromium carbide content while increasing the vanadium carbide content, though I’m not sure that was recognized at the time that S30V was designed. Enter your email address to subscribe to this blog and receive notifications of new posts by email. This is why 3% vanadium 3V has much better toughness and grindability than the 10% vanadium 10V, though at the cost of wear resistance. $237.95. Another change to S30V is that an intentional nitrogen addition was made of about 0.2%, which was made to improve corrosion resistance but also means improved hardening when heat treating. It's about the same edge retention as S30V but with better toughness and corrosion resistance. https://www.patreon.com/Knifesteelnerds, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). The molybdenum was added so that the bearings could be operated at high temperature, but it was discovered that partially replacing Cr with Mo led to similar corrosion resistance to 440C. Along the same lines, CPM S45VN has slightly better edge retention in CATRA test results(all % numbers relative to AISI 440C steel) when compared to CPM S35VN steel, 143% vs… S30V was designed to offer a “balanced” stainless steel which could offer good grindability, toughness, corrosion resistance, and edge retention. $217.95. S35VN, which was introduced in 2009 uses the modified formula of S30V, which is made with 1.45% carbon, 4% vanadium, and 10.5% chromium carbide with the addition of niobium to the vanadium and chromium carbide forming elements. CPM-S30V. In choosing the best pocket knife you should pay particular attention to the type of steel used in the blade. The addition of niobium is reflected with the addition of N in the name which is absent in the S30V. While earlier generations of steel relied on Vanadium, replacing this element with niobium created harder particles that contribute to the wear resistance of steel. Its composition has been altered to create more chromium carbides, while also allowing free chromium compounds in the composition. S60V was the first CPM steel produced by the company through the modification of common stainless grade 440C steel by increasing the composition of vanadium with a corresponding increase of carbon elements.CPM technology was used in the manufacture of homogeneous steel through the even distribution of carbides in the blade. It's good stuff and I have, make and use S30V blades and haven't had big problems with chipping, but I don't chop cinder blocks either. It's a rare occurrence that we need that level of … 29% CPM-154. S30V continues to be the benchmark other stainless knife steels are compared to. I am liking S30V more that 154CM, VG-10, and D2 because when I go to lower angles when sharpening I don’t get the micro-chipping with S30V. However, in testing of that steel Chris Reeve Knives wanted more wear resistance to better differentiate from BG42, leading to an increase in vanadium up to the final 4%. What it is: CPM S35VN is a "Crucible Particle Metallurgy" stainless steel, an improvement over CPM S30V, and is widely regarded as a "super steel" for its properties and performance. 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.. S30V gained wide usage in a relatively short period of time. Another factor with ease in heat treating is how fast the steel must be quenched from high temperature and still achieve full hardness. It is also easier to machine and polish than CPM S30V. So what they did in the development of S90V was reduce the chromium content by 3% and add a corresponding amount of vanadium while maintaining a similar carbon content. ATS34 might need to be touched up a bit more often, but S30V will be a little harder to sharpen. Dick Barber, former Crucible metallurgist who was the lead developer on S30V, asked Chris Reeve (of Chris Reeve Knives) why they were using BG42 steel rather than one of the available Crucible products [6]. S45VN is specifically designed to enhance their S30V and S35VN series for general high-end cutlery and cutting tools.CPM = Cruidible Powder MetallurgyPowder steel is a technology that was invented to allow the production of high alloy tool steels. M390 and CPM-154 both have higher than expected toughness which is very intriguing. The edge retention of S30V is still pretty good relative to other knife steels, better than steels like XHP, Elmax, 154CM, 440C, etc. According to the specs, toughness is slightly decreased, CPM S45VN has 11lbs on C notch, vs. 12lbs on S35vn steel, but better than 10lbs on earlier S30v steel. There weren’t obvious differences in the microstructure of SPY27 between 2000 and 2050°F, however. S35VN was released in 2009 as a modification of S30V to have superior toughness and … Exhibiting very good edge retention, corrosion resistance, and sharpenability, S30V is utilized by a variety of makers for its … Extreme edge retention. 38. Alongside edge geometry and design, blade steel is a critical element that determines how a knife performs. So I think that 20CV would probably be the best choice for Spyderco to use if production costs were competitive with S30V or S45VN. See this article to learn about corrosion resistance. To this day S30V is very common in production and custom knives, to the point where it is even considered by some to be a “boring” choice because of its ubiquity. With this in mind, the chemical composition used in the manufacture of S35VN was rebalanced with the addition of chromium for an improvement in corrosion resistance coming up with a new product: S45VN. S60V was the first CPM steel produced by the company through the modification of common stainless grade 440C steel by increasing the composition of vanadium with a corresponding increase of carbon elements.Knifemaker Jeff Freeman of Freeman Outdoor Gear mentioned that, "I think CPM S45VN is a good improvement, both for the maker and the end-user. S30V quickly became a favorite for knife manufacturers in the 2000s. It also has better toughness than S30V, S45VN, and Elmax. S30V – 2000°F. You can read more about carbide types and how elements interact to lead to different amounts in this article on carbides. These properties make S45VN is outstanding blade steel for high-end folding knives. Steels have varying levels of difficulty working the steel, can require specialized tools and exacting heat treatment.S45VN fits the bill for high-end knifemakers that require excellent edge retention and corrosion resistance that is relatively easy to work. Some furnaces are limited to relatively low temperatures, and at the time of the release of S30V, there were many knifemakers with Paragon brand furnaces with a maximum temperature of 2000°F. Although S35V seems to be better on toughness, this toughness can be incorporated in S45VN through heat treatment at 2000 °F. CPM SPY27 is a steel produced by Crucible exclusively for Spyderco. CPM S35VN Steel Review Chris Reeve Knives PacificWhen Crucible Industries introduced its CPM S30V steel, blade-smiths and knife-lovers alike fell in love with it; the quality wear resistance, toughness, and machinability offered by the steel was equal to none other. "Why Choose S45VN for knifemaking?In its annealed condition, CPM S45VN is a lot easier to grind than CPM S90V and simpler than CPM S30V. Hey guys.. do you have a list of blade steels in order of edge retainability.. I didn't really plan it that way, but it works out that this edge type, when combined with a relatively steep sharpening angle of 17 degrees per side gives a really tough sharpened edge. S45VN … This also means that there will be longer periods between sharpening time. Your email address will not be published. I would argue that S30V is better for every practical need. Great article Larrin! I've seen it in processing and in the finished product. [4] Chilton’s iron age 226, no. Perhaps the toughness could be improved to 7-8 ft-lbs at 1-2 Rc higher hardness if using 2025-2050°F and 400°F: The corrosion resistance of S30V and the similar S35VN have been found to be better than CPM-154, in a range I would call “above average.” The corrosion resistance has been improved somewhat with the new S45VN, but S30V is good enough for many knives. As for edge finishing, I have been going with a 100 grit, then a 220 grit, then a 400 grit at 17 degrees per side, then a buffing wheel with green chrome to finish. It was designed in conjunction with knife companies, knifemakers, and heat treaters to learn the properties that they wanted in a knife steel. Will work and grind like D2 and give the hardness and toughness of CPM S30V. Niobium carbides are also hard hence used in place of vanadium to form higher wear resistance. Your vote has been cast. CPM s90v Corrosion Resistance: Great Corrosion Resistance due to … The effected change led to the formation of a finer carbide structure, with improved toughness, and machinability. Required fields are marked *. My question now is, why would I chose S45VN over M390? 7. Along the same lines, CPM S45VN has slightly better edge retention in CATRA test results (all % numbers relative to AISA 440C steel ) when compared to S35VN steel , 143% vs… The CPM process produces very homogeneous, high quality steel characterized by superior dimensional stability, grindability and toughness compared to steels produced by conventional processes." If you’re also a steel nerd like myself, you know the advantages and disadvantages of S30V, which has long been an industry standard and still continues to be. Eventually though, CRK introduced S30V steel, which Chris was directly involved … S30V, S35VN, and now S45VN. Yojimbo™ 2 Natural G-10 CPM® M4 Black Blade Exclusive. Composition of S45VNAs the latest evolution of alloy steel, S45NV has increased amounts of chromium to help increase corrosion resistance over the earlier generation of S35VN. I think this is due to the supporting material behind the edge. 154CM 2.5 ft. lbs. Crucible also famously developed powder metallurgy steels which started commercial-scale production in 1970. With my own CATRA experiments the relative position of S30V is approximately the same, but I will be talking about those experiments in a future article. 10V, developed in the 1970s [2][3], had very high wear resistance with good toughness but was not stainless. "Uses of S45VN steelThe most common and tested used of S45VN steel in the manufacture of blade knives for hunting, diving, combat, and kitchen use. The lead development metallurgist was Dick Barber who used the history of stainless steels developed by Crucible to inform the designs that were tried, including important details like the amount of chromium used, how much vanadium to achieve the right balance of properties. The company has been producing steel with high wear resistance, corrosion resistance, and toughness by adding vanadium and niobium when creating new products. It's similar in toughness to S35VN but you get improved corrosion resistance and edge retention. Your email address will not be published. S90V, patent filed in 1995 [5], managed to improve on wear resistance, toughness, and corrosion resistance of S60V but its high wear resistance, and therefore poor grindability, means that it has never been a mainstream knife steel. Improving all of those properties at the same time is difficult but I’m sure it helped that S30V is produced by powder metallurgy. There are three significant things to know about S45VN steel: it has high vanadium content for very tough carbides (edge retention), it has high chromium for increased corrosion resistance, and niobium content for a cleaner grind/machinability.In late 2019, Crucible industries in collaboration with Niagra Speciality Metals debuted CPM S45VN. CPM S35VN hasn't been around all that long -- it originated in 2009 as Crucible Industries' attempt to improve on their previous top steel, CPM S30V. Therefore, having only vanadium carbides means a better wear resistance-toughness balance. And the exact same programming. 3. Notify me of follow-up comments by email. I’ve been a long time user of Chris Reeve Knives and even have my faithful first regular Sebenza in BG42 steel. And thanks to Dick Barber for talking to me about the development of S30V. It gives a nice sharp bright and mirror-polished finish on the edge. Custom knifemaker Jeff Freeman mentioned, that machining and cutting S45VN steel for blades, "For processing, I use the same tools (solid carbide) with the same coolant and fixturing.

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