Do you frequently use your knife to meal prep acidic ingredients like citrus or tomatoes? 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. Each has its own strengths and weaknesses. LC200N is an amazing steel! This increases the strength of the edge tremendously. The famous PM2, a very known blade with a lot of fans ( I’m one of them), this knife is a just amazing, for me it’s a gem no matter which version/years it’ going to come out, and let me tell you why? Softer chromium carbides do not contribute as much to wear resistance but they detract just as much (or more) from toughness as vanadium carbides do. In a carbon-rich alloy like CPM 20CV, the process of austenitization heats the steel until its crystalline structure changes to become austenite instead of ferrite. Don’t know 20CV from M4? Carbides are hard particles in steel that add to wear resistance but detract from toughness. And molybdenum and nitrogen additions were used to balance the corrosion resistance along with edge retention and toughness. S60V was released in the early 1980’s [4], perhaps the earliest PM stainless tool steel. S30V and S35VN are very similar for corrosion resistance. Good edge retention, toughness, and sharpenability, D2 has been a popular knife tool steel dating back to WWII, and for good reason. Compared to CPM-3V, A2 is available more much affordable and is much more easily sharpened. 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. 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. 20CV offers superior edge retention and higher corrosion resistance compared to S30V with the same level of toughness. Is blade steel a mystery to you? In this section, we’re going to compare our steel with other steels, and for this, I use four criteria; Edge Retention, Corrosion resistance, Ease of Sharpness, and Toughness, and I use a scale or note from 1 to 10. With significant amounts of Chromium, Molybdenum, Vanadium, and Tungsten, these steels are 100% ready for action. Double temper at 600°F (315°C) 2 hrs. First, the thick 3.42” blade that comes with S30V steel which offers great toughness, great corrosion resistance and wear resistance, and it will hold an edge for long, second the compression lock (is a revers liner lock it’s in the back) it’s a very solid locker that will prevent your blade from playing, the advantage of this lock is that your thumb will never come in the blade path when closing it, and last is the ergonomics are just good, fit rights in hand (Spyderco being Spyderco I love their designs) whit a good placement for finger (Choil and thumb space), I just love it, sp if you’re looking for an EDC with S30V Steel, just take the PM2, you won’t regret it. Sharpenability is pretty self-explanatory, but softer steels can be touched up in the field on that big elk hunt. Use it. Not sure yet on designs and colors. It’s remarkable the increased performance you find in cut tests when comparing premium steels to lower end options. [4] Chilton’s iron age 226, no. The best blade steels exhibit a balance of strength and toughness. It really depends on what you're doing with your knife. Crucible also famously developed powder metallurgy steels which started commercial-scale production in 1970. I get it. Get a free guide on Knife Sharpening to find out how you can achieve more. The comparison between the two is tough. This blade steel exhibits good toughness, but it does not meet the level of M390. Metallurgy and Testing of Knives and Steel. Hey all, this is my first post, though I've been lurking around for awhile now. M4 is not stainless, but it is tougher than the rest. Low hardness increases toughness at the cost of edge strength. This is a small list of steels that aren't necessarily in high production anymore, but still offer high-end or mid-range performance. S30V is tougher... tough to sharpen and once sharpened, tough to lose the edge. CPM-20CV can be found on my knives today and is made by the USA-based Crucible Industries. So is the steel upgrade worth it? Below is a table summarizing the resulting properties including the amount of chromium carbide (M7C3), vanadium carbide (MC), measured toughness (higher is better) wear resistance in a crossed-cylinder wear test (higher is better), and corrosion measured in a 10% boiling acetic acid solution (lower is better): So with all of those lessons learned, it was known that a lower chromium content would allow vanadium to go further in terms of its contribution to wear resistance. As you can see, the CPM S30V is stainless steel with 14% of Chromium, high in Carbon (more than 1% of carbon), high in Molybdenum and Vanadium which makes high-end stainless steel. Advantages: Wear resistance, corrosion resistance. CPM-20CV is Crucible’s version of Bohler’s popular M390 steel which also influenced Carpenter to copycat with CTS-204P. The Sebenza 21. CPM S30V. Based on experience and testing, M4 steel may outperform blade steels such as M390 and S90V in terms of edge retention and M4 is in a completely different league in terms of toughness. The goal was to design a steel which was superior to BG42 in terms of toughness, edge retention, and corrosion resistance. I have not seen info on 20CV. Below shows the results of CATRA experiments reported by others that I have shown in other articles. And thanks for the info. Edge retention and toughness are very good. 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. Any of these blade steels are 100% good to rock and roll. The 400 Series of steel has been popular for longer than almost any knife guy has been alive. CPM-3V is, in many ways, the perfect blade steel for a fixed blade knife. ?? Often overlooked is the job at hand. S90V offers high edge retention with low toughness and the same corrosion resistance compared to S30V. This steel has extremely good corrosion resistant properties. The vivid patterns visible in Damascus steel come from the acid etching process in a ferric chloride solution. 1095 is budget-friendly and widely available. M390 exhibits excellent edge retention, corrosion resistance, and high level toughness. An easy to sharpen knife will generally not exhibit excellent edge retention. S30V VS 20CV. I decided to pull the trigger on a custom benchmade griptillian, with a drop point blade. Certain blade steels are more stable at highly acute angels. As a Powder Metallurgy (PM) tool steel, you get a combination of impressive wear resistance and edge retention plus the added benefit of being highly corrosion resistant due to high levels of chromium. As always if you have another opinion about the CPM S30V, please share it on the comments below, I ‘ll gladly discuss knives. In the development of S90V, the Cr was reduced relative to S60V, dropping from 17% to 14% similar to the modification of 440C to make 154CM. They interviewed people like Sal Glesser, Ernie Emersion, Tony Marfione, Phil Wilson, Bill Harsey, Mike Jones, Steve Ingrim, Tom Mayo, Jerry Hossom and Paul Bos [7]. Spyderco and Cold Steel frequently utilize this steel and the chart below shows why. VG-10 exhibits many of the same qualities of 154CM with the largest difference being an increase in corrosion resistance. The higher the chromium content, the less vanadium carbide is formed for a given vanadium content, and more and more chromium carbide is formed. Crucible has been a part of the knife steel industry for many decades, such as with steels like 154CM which was developed in the late 1950’s and gained popularity in knives through Bob Loveless in the early 1970s.

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