About CPM MagnaCut Steel Designed by Dr. Larrin Thomas, boasting the edge retention of CPM 20CV with the toughness of CPM 4V. I don't remember the hardness of the data sheets I was looking at when spec'ing a 5" camp knife working with a forum knife maker who did his own heat treats. CPM 4V will have all the vanadium carbides but will be tougher and operate with a . 4V is much . They both offer more toughness and edge stability at a higher working hardnesses then CPM M4, yet reduced edge aggression and wear resistance. CPM 4V is unique in its potential to be very, very strong, much more then it's more malleable and tougher cousin, 3V. CPM M4. My favorites of the high edge retention group are Vanadis 8 and CPM-10V. Perhaps just you expected CPM-M4 to be better. High Edge Retention, Moderate Toughness. 1 - CRK Umnumzaan. CPM MagnaCut vs CPM 4V. 1 - CRK Small Sebenza 31/Macassar Ebony Inlays. Stainless Steels Conclusion The CPM M4 offers great qualities for a knife, in exception of corrosion resistance, it has great edge retention, hardness, and wear resistance. Cruwear is not supposed to be stainless but it almost seems it in my uses. Then cool slowly with the furnace at a rate not exceeding 50°F per hour (28°C per hour) to 1000°F (649°C). CPM 3V will be more prone to edge rolling at the lower cutting geometries . 1 - CRK Large Sebenza 31/Box Elder Inlays. I doubt many of us could distinguish the 2. The way the blade curves to the point mimics the arc made by the motion of your arm, which helps the Essential perform like a much larger knife. From a custom knife maker perspective, there is no reason to use CPM M4. Thus these are popular steels in heavy-duty survival/bushcrafter type knives, from major name production and custom knife makers. The video has discussion about to. The steels used are CPM 4V, CPM M4, and CPM S90V. The Bark River Knives Essential is an EDC-size knife specifically designed to be compact -- a great cutter and comfortable in the hand.. This video addresses the subject of toughness testing with knife steel. What it is: CPM M4 is a "Crucible Particle Metallurgy" carbon tool steel, widely regarded as a "super steel" for its properties and performance. Powder metallurgy steels with low vanadium content like CPM-1V and Z-Tuff/CD#1 have extremely high toughness. CPM 4V is a powder metal tool steel with an outstanding combination of properties including high impact toughness and very good wear resistance. The S30V looks about right based on others' tests. It's very close to CPM 4V and I've had good luck with 4V in terms of wear resistance and edge holding. CPM 4V is a powder metal tool steel with an outstanding combination of properties including high impact toughness and very good wear resistance. Ready to grab a Para 3 in Orange REX45, or Red CPM 4V. Statistics 07 10 06 05 Rankings Edge Retention Toughness Corrosion Resistance Ease of Sharpening #5. M4 is definitely not stainless and needs a bit more care than Cruwear. Can anyone with experience, or knowledge please tell me about these steels? M4 seems to be all about getting a nice edge and keeping it but it can be hard to get it. What it is: CPM M4 is a "Crucible Particle Metallurgy" carbon tool steel, widely regarded as a "super steel" for its properties and performance. CPM 4V steel Hardness CPM 4V hardness is 64HRC which is very impressive. Composition Relative Properties CPM 1-V has shock resistance close to S-7 and wear resistance close to A-2. If memory serves, M4 responds well to powder metallurgy so the CPM version stays together (toughness) pretty decent, in real world scenarios. CPM 9V contains less carbon and vanadium than CPM 10V, which results in a lower attainable hardness, slightly lower wear resistance, but a significant increase in toughness. My favorites of the high edge retention group are Vanadis 8 and CPM-10V. Perhaps just you expected CPM-M4 to be better. CPM 9V Powder Metal Tool Steel. #5. Relative Properties Physical Properties Density: 0.278 lb/in3 (7700 kg/m3) Specific Heat: 0.11 Btu/lb/ºF (460 J/kg°C) Modulus of Elasticity: 30x106 psi (207 GPa) Based on my experiences with D2, cruwear should be more rust resistant than M4 and M4 should be a little tougher in impact resistance. However, MagnaCut provides better corrosion . These steels are the good old' hard-working steels. They both offer more toughness and edge stability at a higher working hardnesses then CPM M4, yet reduced edge aggression and wear resistance. I have a new knife in CPM-M4 hardened to 64-65 HRc. Advantages: Relative toughness, wear resistance. As to toughness of the two they are almost indetical in published Charpy tests and both and both fall between 01 and A2 for toughness. Most of these steels are carbon steels, except for CPM MagnaCut (the fancy steel cooked up specifically for knives by Dr. Thomas), which has excellent corrosion resistance. From a custom knife maker perspective, there is no reason to use CPM M4. CPM 4V Powder Metal Tool Steel. CPM 4V should be considered for service in fine blanking, powder compaction tools, for processing high-strength low-alloy (HSLA) steels, advanced high-strength steels (AHSS) and applications where a combination of . CPM 4V vs CPM 10V. From the Knife Steel Database : As Crucible states it has high impact toughness and wear resistance and should be considered for the applications where higher attainable hardness and wear resistance are. According to It chemical composition and hardness, the CPM M4 offers the following properties: Edge Retention: with a hardness of 65HRC, the CPM M4 offers an exceptionally Edge retention, one of the best in tool steels even in carbon steels. May 3, 2018. Bark River Knives: Essential EDC - CPM M4. CPM-M4 knives are available anywhere from 60 to 64+ Rc which would obviously affect . With this hardness level, knives made from this steel portray high wear resistance, excellent edge retention, and, most importantly, without compromising toughness. Made in the USA by Crucible Industries. CPM M4. The S30V looks about right based on others' tests. Great for all kinds of knives. Feb 15, 2018. Carbon and tool steels (chromium content less than 13%) Crucible: CPM-M4, CPM-3V, CPM-4V Generic: A2, O1, D2, 1095. Reactions: rodriguez7 and kuraki. I got the Vanadis 4 steel. . Powder metallurgy steels with low vanadium content like CPM-1V and Z-Tuff/CD#1 have extremely high toughness. The cold work tool steels known for superior wear resistance typically contain significant amounts of vanadium with sufficient carbon to form high volumes of vanadium carbides. NW Montana. The best steels with balanced properties include 4V/Vanadis4E, CPM-CruWear, and CPM-M4. A large volume of hard vanadium carbides provides the high wear resistance. CPM 4V is a powder metal tool steel with an outstanding combination of properties including high impact toughness and very good wear resistance. 10V offers almost three times the wear resistance of 4V. CPM-M4 M390 CPM 20CV Lc200N CPM-S45VN. The Cruwear is going to be a little more stain resitant and have less wear resitants so it will be easier to sharpen than M4. The equivalent of CPM MagnaCut can be CPM 4V, which is non-stainless steel. High Alloy Tool Steel and High Speed Steel Ratings Stainless Steels In terms of comparisons with other steels, MagnaCut looks very similar to CPM-4V and Vanadis 4 Extra as was expected (labeled V4E with a tan line on the non-stainless chart). This is even better than non-stainless steels that are well regarded in terms of toughness such as CPM-M4 and A2. As Crucible states it has high impact toughness and wear resistance and should be considered for the applications whre higher attainable hardness and wear resistance are desired compared to Crucible CPM 3V steel. Since it's a tool steel, it is prone to patina and rust way more than M390. The steels used are CPM 4V, CPM M4 . Heat at a rate not exceeding 400°F per hour (222°C per hour) to 1600-1650°F (871-899°C), and hold at temperature for 1 hour per inch of maximum thickness; 2 hours minimum. CPM M4 is heat treated to a relatively wide range of hardness, all the way from 60 Rc up to 64+ Rc. Steels like CPM MagnaCut, CPM M4, CPM 4V, and CPM CruWear fit in this category. CPM 4V should be considered for service in fine blanking, powder compaction tools, for processing high-strength low-alloy (HSLA) steels, advanced high-strength steels (AHSS) and applications where a . Each steel is evaluated in terms of four performance characteristics: edge retention, toughness, corrosion resistance, and ease of sharpening. But really, any comparison has to specify the hardness, otherwise it's an apples/oranges thing. I can get one or the other new for about $229. Blade HQ opines that CPM-3V and -4V are, "perfect blade steel for a fixed blade knife" because they score high in edge retention and toughness, with medium corrosion resistance and ease of sharpening. . Disadvantages: Relatively more difficult to sharpen than CPM 3V and predecessor tool steels like A2, not as tough as CPM 3V or CPM 4V. 1 - CRK Large Inkosi Insingo/ Black Micarta Inlays. We chose ~61 Rc for our initial study because a fair number of knives are produced around the value, and gives a more 1:1 comparison in terms of wear resistance with other knife steels that are typically around that hardness. The video has discussion about to. I do believe CPM M4 has a slightly higher overall carbide volume, but not by much, thus making 4v "tougher", in theory. Disadvantages: Relatively more difficult to sharpen than CPM 3V and predecessor tool steels like A2, not as tough as CPM 3V or CPM 4V. CPM-M4. IIRC, some of the guys in Bladesports who have been using CPM M4 in their competition choppers are leaning towards 4V now. Re: REX45 vs. CPM 4V. Both steels offer excellent toughness at different levels of hardness and are therefore highly resistant to breaking or chipping. Advantages: Relative toughness, wear resistance. CPM 3V provides impact toughness approaching that of S7 and wear resistance higher than D2. The steels used are CPM 4V, CPM M4, and CPM S90V. This of course depends on heat treat as either can be heat treated a little softer to improve it's toughness. . CPM 10V offers higher toughness and is more suitable for knives that their applications require additional wear resistance. MagnaCut and 4V steel both provide the same level of edge retention. 17 's in 12 different steels. The steels used are CPM 4V, CPM M4 . CPM 4V will have all the vanadium carbides but will be tougher and operate with a . High Alloy Tool Steel and High Speed Steel Ratings. Cruwear is dream to sharpen and in my estimation has edge retention on par with S30V. CPM Rex M4 HC also excels in cold work tooling applications, where it provides better toughness and wear resistance than high-carbon, high-chromium die steels such as D2 and D3. Corrosion Resistance: The CPM M4 corrosion resistance isn't the best as the edge retention; with 4% of chromium, it offers decent corrosion resistance. CPM 4V is a more available USA copy of the European Vanadis 4 Extra. The best steels with balanced properties include 4V/Vanadis4E, CPM-CruWear, and CPM-M4. CPM 4V should be considered for applications where a higher attainable hardness and additional abrasion resistance is required than can be offered by CPM 3V. CPM, made tough, and made in the USA! CPM 4V and 10V are all made by crucible following the same production process, the only difference is the composition of the alloys. CPM 4V is a more available USA copy of the European Vanadis 4 Extra. CPM Rex M4 HC offers improved cutting tool life compared to conventionally-wrought M1, M2, M7 and other lower-alloyed high speed steels. The performance of each steel, against each characteristic, is scored on a 1 - 10 . I thought it would be too brittle, but it's proving to be very tough, as well . Not that M390 is a slouch, I've got plenty of knives with M390 and I'm always on the lookout for 4V and 10V blades. 2 - Bradford Guardian 3's (Wharnie Vanadis 4E and 3V/Drop Point) 1 - Monterey Bay Knives Slayback Flipper - ZDP 189. In terms of comparisons with other steels, MagnaCut looks very similar to CPM-4V and Vanadis 4 Extra as was expected (labeled V4E with a tan line on the non-stainless chart). Top. . This is even better than non-stainless steels that are well regarded in terms of toughness such as CPM-M4 and A2. The only drawback to 4V is that it is not as corrosion/stain resistant as 3V. cpM 4 V At the November Fabtech Show in Chicago, Crucible ln- dustries and Latrobe Specialty Steel Distribution introduced CPM 4\P. CPM 4V joins forces with the Crucible Killer vs family of CPM IV, CPM 3V, CPM M4, CPM 9\/, CPM 1 OV, and CPM 15V to cover any difficult cold work tooling application. CPM 4V steel Wear resistance Like any other hard steel, CPM 4V offers excellent wear resistance. CPM-M4 knives are available anywhere from 60 to 64+ Rc which would obviously affect . Very similar to Bohler-Uddeholm Vanadis 4E steel. abbazaba Member Posts: 3874 Joined: Mon Nov 09, 2015 9:40 pm Location: New England. We already have the 4V Shaman fella's! Vanadis 4 Extra is slightly different than CPM-4V which may be a borderline case but I didn't have any Vanadis 4 Extra so that made that decision easier. This video addresses the subject of toughness testing with knife steel. CPM 4V(Crucible)- Crucible CPM alloy. CPM 9V is a powder metal tool steel that provides very high wear resistance in combination with high impact toughness.