Because of the material difference, the blades differ in toughness, edge retention, corrosion resistance, and ease of sharpening. Editors note: This article was first published in May 2015 and was most recently updated on May 25, 2020. On the positive side, they are very easy to forge and grind. On the flip side D2 steel is much harder than other steels in this category such as 154CM or ATS-34 and as a result holds its edge a little better. In addition, According to Sandvik, 14C28N steel is easy to work on, reducing production costs and hence affordable knives. LC200N has similar properties to those two but with saltwater levels of corrosion resistance. at least it has some vanadium over the 420hc. The bump in hardness comes from precipitation of fine carbides in the steel, read an article I wrote on budget steels here, https://knifesteelnerds.com/2019/05/26/new-micrographs-of-42-knife-steels/, https://i0.wp.com/knifesteelnerds.com/wp-content/uploads/2021/10/stainless-toughness-10-19-21.jpg?w=757&ssl=1, https://knifesteelnerds.com/2019/10/14/corrosion-resistance-testing/, https://knifesteelnerds.com/2020/03/02/cpm-spy27-experiments-toughness-corrosion-resistance-and-more/, https://knifesteelnerds.com/2018/12/03/cryogenic-part1/, https://knifesteelnerds.com/2018/12/10/cryogenic-processing-of-steel-part-2/, https://knifesteelnerds.com/2018/12/17/cryogenic-processing-of-steel-part-3/, The Pros And Cons Of Stainless Steel Copper And Aluminum Brewing Equipment SanctuaryBrewCo, https://knifesteelnerds.com/2020/05/01/testing-the-edge-retention-of-48-knife-steels/. I havent tested Sleipner yet. This grade can be treated cryogenically to improve edge retention. GearJunkie Copyright 2013 2023. Thank you. The old rule in steels used to be corrosion resistance, toughness, or hardness choose two. But SM100 (the trade name for Nitinol 60) threw that out the window when introduced to the cutlery world. Low Carbon steels like AEB-L wont hold up to wood cutting even though it can hit 64 hard, it just doesnt have enough Carbon. For instance, if a 35 edge in 1095 steel at 58 Rc provides appropriate toughness for planing hardwood, what edge angle in, say, AEB-L at 62 Rc might give us a comparable effective toughness? The highest edge retention steel was Rex 121 which was at 70 Rc in combination with lots of high hardness vanadium carbides. 1095 Time and use have proven this to be quite accurate. Blue Super and 1.2562 have higher edge retention but relatively low toughness. Its in the same class as Vanadis 8 and 10V. A lot of custom makers also like S110V, including the great RJ Martin. Being stainless is not an on or off property, and some stainless steels are more resistant to corrosion than others. Theyll be fully attributed to you with website and Patreon links, obviously. Sorry, most of my previous comment was borderline word salad. See the chart below showing 52100 steel that was overaustenitized (unintentionally) by a knifemaker that sent me specimens for toughness testing. 14C28N knives offer excellent corrosion resistance and toughness. and get better and longer-lasting performance? Instead, Vargo titanium uses a unique material called sintered titanium-ceramic alloy. Continue with Recommended Cookies. Corrosion on knife steels most usually takes the form of rust, patina, and staining. That comes with an excellent return of experience that makes it ideal for the manufacturer of outdoor and tactical knife blades. https://cedric-ada-store.creator-spring.com/listing/brickard-heritage-collectionGood gravy its bricky on thingsSubscribe and hit the bell! There are a few aspects to your question, I think. 52100 and CruForgeV are good for general purpose knives. But I think it would have much higher toughness than any of the steels on the chart. Different companies can vary some between each other making the same product, while a single company is going to be more consistent. worldwide, even the chinese have an equivalent (8cr13mov). CPM-REX 121 and Maxamet are both in this category. That said, it's not as tough as many other steels and exponentially tougher to sharpen. Working closely with our factory the heat treating of this steel has been perfected resulting in excellent performance for the price. The claim is that they align the blades edge, pushing any slightly rolled over bits back into place and thus preserving the cutting ability of the knife for longer. The brand Bark River uses A2 in many models. High Alloy Tool Steel and High Speed Steel Ratings. are after the ratings. Most of the user loves this one that has received a lot of attention on this site. A good quality knife must have sharpness, great edge retention, and a sturdy handle. But which? nevertheles its importand to keep in mind what exactly is going on there (abrasive plastic media, loss of most of cutting ability during the first few strokes etc.). By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. One important concept I want to hammer home is that there isnt one property that is most important. Phone Hours (MST) Stainless steels are another subset of high alloy tool steels that have enough chromium in them to have stainless levels of corrosion resistance. I was thinking maybe Sleipner or A2 would be best if a PM steel was out. Is that regression line (or other trend line?) The both blade are equally wear resistant. So you can estimate how much a change in hardness would affect edge retention by following the slope of those lines. While not a powder steel, 154CM is widely used in nicer knives. D2 at 58 hard will cut much more rope than AEB-L at 62. You need a hard medium to sharpen it like diamond or boride. While 14C28N and D2 are both pretty to look at, buyers always regard one over the other. The steel is an air-hardness tool steel that is considered semi-stainless because of its high chromium content. Get for a complete guide about other steel; you can read 14c28n vs 8cr13mov reviews. Many knife enthusiasts are concerned with categorizing steels as excellent, good, poor, etc. Yes its very easy to sharpen but it doesnt hold an edge at all. Flashlights run the gamut of price and quality. But if when youre searching for tough steel for your outdoor experience camping, or hunting, it would be perfect steel but not the best choice therere other steels with better than toughness that would suit your usage. Diving into the pool of knife personalization possibilities is a fantastic way to fend off the post-knife-buy blues. In the context of a knife this would be chipped edges or broken knives. Below shows approximate maximum hardness vs stainless rating for several stainless knife steels. You cant look at only the chromium content of the steel to know the level of corrosion resistance. . What is pulling that line high and to the right? S110V has improved corrosion resistance at the cost of some toughness compared to S90V. 14C28N is a stainless steel that was developed specifically for use in knives. I mean the box cutter type, with the replaceable trapezoidal blades. I was wondering if the 14c28n sample was also prequenched like the AEB-L toughness samples? It has excellent edge retention, corrosion resistance, and ease of sharpening. The knife Natrix with substantial copper handle is a deceptively hefty EDC. Toughness is the resistance to chipping or breaking. But the true calling card of INFI is its insane toughness. Manage Settings I did a large study of different knives with identical sharpening and edge geometry. Its easy to sharpen. I am just grasping at straws here, but from the data you shared, it seems like toughness does increase faster than edge retention decreases: it is harder to get a very high edge retention knife that will still be somewhat tough compared to a very tough knife that will still hold an edge ok. However, in our testing there is a reduction in toughness by using the high temperature range rather than the low temperature range, such as was found with CPM-CruWear (Z-Wear) or CPM-10V. 1. At the end of the article I gave a list of reasons why I hadnt made my own ratings chart, two big reasons were: 1) I didnt yet have articles explaining what edge retention and toughness even is (this was early on in Knife Steel Nerds), 2) I didnt have good experimental numbers on many steels. However, Kershaw asked Sandvik to make their 13C26 steel more resistant to corrosion, and the result was 14C28N. There is no such thing as a steel that is a 10 in both toughness and edge retention. Aluminum oxide is used in most common sharpening stones and it is softer than vanadium carbide, which makes sharpening high vanadium steels more difficult. Below shows a comparison of carbide structure between D2 and CPM-D2, and then toughness measurements between the conventional and PM versions of CruWear, D2, and 154CM. When the blade gets messed up I just replace it. There you said 7.6 for 420HC. The steel is susceptible to overheating during hardening do not overheat. Wear resistance comes from hardness and carbides, hard particles formed between carbon and another element like Vanadium or Tungsten. It isnt impossible, but contrast may not be very good and the austenitizing temperatures of the two steels arent very compatible. I tested its edge wear resistance but not its toughness yet. we dont know. For example, Bohler M390, CTS-204P, and CPM-20CV are all nearly identical and indistinguishable in practice. But then if you look at an increase of 100 mm in the CATRA test from Maxamet to Rex 121 the toughness only drops 1-2 ft-lbs. ), intended use will give you all the answers. I have a (relatively) short introduction before getting into the ratings with a few important things to put them into context. However, the 14c28n provides perfect edge retention with a maximum hardness of 62Hrc and the mixture of Chromium and Carbon. The big difference in properties vs the low alloy steels, however, are the harder carbides that are found in these steels. i understand the samples were treated in the same way. Metallurgy and Testing of Knives and Steel. I have a bachelor's degree in Mechanical engineering with a specialization in material science. Question. The Vargo Sobata 398 is unlike any other knife on this list. 0.62% of Carbon: Makes knives harder and more resistant. So the major tradeoff is in how much carbide you want in the steel for edge retention without dropping toughness too much for the intended knife and user. For more information see our. Monday-Friday 14c28n vs D2 Steel. This isnt exactly how steel works; different properties are difficult to increase without affecting something else. Youre right I had to check my spreadsheet. It richly deserves its reputation for high-quality gained over the years by Sandvik, a Swedish manufacturer of world-renowned steel. It is a premium steel that is known for its excellent balance of hardness, corrosion resistance, and edge retention. All of the experiments shown below are possible thanks to supporters. This makes it a great choice if you don't have . Extra kudos for your mathmatical steel composition to edge holding model thats really impressive work. . Low Alloy tool steels have small alloy additions to increase hardenability so they harden more easily in oil rather than water. Also known as Z-Finit, Zapp produces this steel in America. 1060 Most steels use carbon to increase hardness, but 14C28N uses nitrogen, boosting hardness without the normal penalty of increased corrosion. A quick check shows the compositions of these steels are nearly identical, so based on that Id expect them to perform similarly (differences in heat treat and blade geometry aside). CPM-S90V is my favorite in the high edge retention category because of its decent toughness. I would love to see a Tungsten-Carbide blade (like Sandrin is using) and how it compares for Edge Retention, Toughness and Corrosion Resistance especially how it compares to s90v. This steel is quite corrosion resistant and sharpens easily. most knives are being made out of these and other mediocre steels like 14c28n, 420j2, 425m. Stainless steels usually top out around 64 Rc and may require careful heat treating to get there. We all have our preference, but overall, preference leans towards the pocket knife with a clip. The edge retention numbers are normalized to the hardness of the closest toughness test. 420HC doesnt hold an edge well, but its relatively stain-resistant and tough. Generally this is code for difficulty in abrading away steel. Below I have shown the difference in carbide volume between AEB-L, CPM-10V, and Rex 121 to get an idea of how much more carbide there is in the high edge retention steels. And for high toughness you want little or no carbide. Its very corrosion-resistant and quite tough. There is no single category that means that a steel is more premium or better than another. It has high levels of chromium and carbon, making it extremely resistant to corrosion. This is an old high-carbon (non-stainless) steel. Though the volume of carbonitrides in the steel is relatively high. The biggest change that is seen with powder metallurgy in measured properties is in regards to toughness. The maximum edge retention available in this group is not particularly high because most of the wear resistance comes from iron carbide, also called cementite, which is the softest of the different carbide types. We can predict edge retention of a steel within a relatively narrow band based on hardness and carbide volume. So hard vanadium carbides means you get more edge retention for a given amount of carbide. Because of its abrasion-eating hardness, knives with REX 121 come at an exceptionally high price. Below shows the results of MagnaCut testing vs other steels where it is labeled as New Steel.. It improves wear resistance and hardenability. Been here before? 14c28n vs. D2 Steel D2 is as rigid as 14c28n, thus has almost equal edge retention abilities. For more information, please see our 14C28N steel also has excellent wear resistance due to its high chromium content. I also added a few more steels in this study. This is good for ease in heat treating in large batches and for even cooling that greatly reduces warping and size changes. The knife does dull faster. For decades, different steels have been made to fit this category. I did a test with knives in 440A (stainless), D2 (high alloy steel with some corrosion resistance), and 1095 (no corrosion resistance). Other factors include how thick your edge is, how dull your knife was at the start, the nature of the heat treatment, and what youre using to sharpen your knife. Cold Steel still uses VG-1 on some knives, and, for the money, it does well. All rights reserved. Here is the article by Larrin on 48 steels. This list is not exhaustive, so check out some of our rating tables for more information on whatever steel youre interested in. I measured corrosion resistance of a slightly lower carbon 420 here: https://knifesteelnerds.com/2020/03/02/cpm-spy27-experiments-toughness-corrosion-resistance-and-more/. Heat treatment refers to the heating and cooling steps employed to achieve your knifes proper balance of attributes. Should you continue to scroll further, you may find yourself lost in a seemingly endless list of knife steel wealth and knowledge. How would n680 compare to m690? Developed by New Jersey Steel Baron, Nitro V is a non-powder steel marketed as an enhanced version of AEB-L. Nitro V, as its name indicates, adds nitrogen to AEB-Ls formula to make the steel even more corrosion-resistant. So for most steels they are given a rating at around 59-62 Rc, apart from a few steels that are never used at that hardness. The D2 steel compares nicely with 14c28n steel in terms of edge retention, as it's quite hard as well. AEB-L is rarely found on production knives but can be found on custom knives easily. Perhaps a bigger issue with the upper temper is for stainless steels, as there is a significant reduction in corrosion resistance by tempering at 1000F instead of 400F. Fix-It Sticks Compact Ratcheting Multi-Tool Review, Toughness, Wear Resistance, Corrosion Resistance. Toughness is a measure of how much resistance a steel has to fracturing. The steel is similar to Sandviks 13C26. Its very tough and exceptionally corrosion-resistant. I've heard d2 is miles better and i dont want to pay 90 for the p135 and get a significantly inferior blade to paying 110 for the D2 Rat. That says to me theres a measurable abrasive quality to wood for sure. AR-RPM9 If I made some plane irons from AEB-L at 63 Rc (where its still tougher than 1095 at 59-60 Rc, the standard vintage steel in plane irons), could I drop my sharpening angle from 30-35 to 25? I dipped each in lemon juice and left in open air and tested after 30, 100, and 300 minutes, dipping in lemon juice again each time. third and most important is what happened to the burr. Copper frame are very sturdy and machine well and take the best patina over time. For the steels that I rated I give them a single rating rather than a range based on different heat treatments that can be performed. I see very little about cryo outside of journal articles, and I wonder which knifemakers use it. Its used for combat knives, bushcrafting knives, and other applications where having a supertough blade trumps the need for edge retention and corrosion resistance. Using controlled furnace heat treating resulted in toughness around 23-28 ft-lbs at 61-62 Rc, while the knifemaker heat treated specimens were 7 ft-lbs or below. Thank you for the accurate data. 8am-5pm Saturday. If you are a newbie to steel knives and the differences are not yet clear, come with us to the next section as we look into each knifes characteristics, pros, and cons. the following is not a critique, just a few thoughts to maybe put the relationships into a wider perspective and point to additional dimensions. We did the research to help you find the best hunting knife for your needs and budget. One of the more common stainless steels, and one readily available in lots of different places worldwide, AUS-8 is a decent all-around steel. Save my name, email, and website in this browser for the next time I comment. It has enough water-fighting properties that it can be used in marine environments. Im writing a book about choosing a knife for EDC. But keep in mind that no steel is perfect for everything. For these reasons D2 steel is a good for smaller folding knives, but is not ideal for large fixed blades such as dedicated choppers and large survival knives. Thanks in advance, Simon, For hard use everyday cutting in a packing company, Everything from fome, cardboard, tape, thick plastics, And plastic wrap that is against metal. G10 Everyone has their own opinion on what they deem the best folding EDC knife. On the other hand small but mighty, the pocket knife provides both in professional performance and in arresting good looks. If you're stuck between 14C28N and 440C, here's a breakdown of the pros and cons of each type of steel. Steels high in toughness are excellent for knives likely to see hard impacts, like large chopping knives. Divers, sailors, and anglers need knives that will resist corrosion above all else. D2 is a tool steel used in industrial settings. Oftentimes steels that are reported to be difficult to sharpen are in fact improperly heat treated and challenging to deburr. Most low alloy tool steels and carbon steels also have fine carbide structures without powder metallurgy processing. CPM 4V Steel high in carbides cant be stamped out; it must be cut by a waterjet or laser, which takes time and is more expensive. H1 The knives can be used in humid and wet environments without rusting. Austenitizing is the process where the steel is heated to high temperature prior to quenching (rapid cooling) to harden the steel. Another is that 8Cr13MoV is a generic name for a specific composition while AUS-8 is a name of a product by a specific company. I have a Winkler Knives Recon model in 5160 steel and even though the knife model is ok, the steel is shit. AEB-L and 14C28N are the best in the high toughness group. And a label: AEB-L. Steel softens as tempering temperature increases, but certain steels see an increase in hardness in a certain higher temperature range such as shown below for high speed steels that are designed for this type of tempering: This high temperature tempering can be done for several reasons, such as better resistance to overheating during grinding, or because a coating will be applied to the knife that requires a high temperature. The steel was developed to be free from chromium carbides which gives it properties similar to balanced non-stainless tool steels like CPM-4V and CPM-CruWear. 14C28N VS D2 The two sheets of steel are comparable in terms of toughness and corrosion resistance. Take a look at this edge retention test. Note that corrosion is detrimental for the cutting edge. and corrosion resistance than the 420HC steel. Steels 7Cr and below arent worth your time or money. This means consumers should be able to maintain these quality knives at home. as you mentioned catra indicates the edge angle as being by far the most important variable. These steels are best for knives that dont see impacts and are some of the most difficult to sharpen. 14C28N steel is known to offer among the best if not the best toughness in knife steels out there. Where did it come from? So setting edge geometry for the type of knife and intended use is very important. SUS410 : at a given toughness, magncut will have better edge retention in real life applications than s90v if it has optimal geometry (or maybe it wouldnt, just an example). I do not have rust issues with it (as long as I have a good finish) some heavy stonewashed finishes rust easier. The D2 version is heavier and harder, but doesn't cut as smoothly. how much more can you bend/pry with it? With recommended hardness range of 55-62 HRC; the 14C28N is great for knife applications which place very high demands on edge sharpness, edge stability and corrosion resistance such as chefs knives, hunting knife, pocket knives and fishing knives. In real life, would you expect any presumed increase in deviation from the specified formula, as well as the effects of said deviation, to negatively impact the performance of 8Cr13MoV to any truly noticeable degree? Despite its age, its a truly superior steel. The reason is because sharpening and edge geometry will also greatly control properties. Both knives come at an affordable price for high-end knives. Also, what kind of steel is used for utility knives? You also reported 8.6 for 440A in that post, compared to 8.5 in this post. The only thing putting me off immediately buying the p135 is the 14c28n steel. Is 440A really that much better than 420HC, or have you found a narrower gap? Rust Test includes:D2 from Bestech and WE1095 from shop8Cr13Mov from Spyderco420HC from BuckWalmart knifeY Start (Marked D2)Follow me at:Twitter: https://twi. EDGE RETENTION . The 10V specimens tempered at 1000F were 4-5 ft-lbs while the specimens tempered at 4-500F were 7-8 ft-lbs. Its OK to be a steel snob, but keep in mind that you dont have to if you want a good knife. However, it is not really known how many different companies are making 8Cr13MoV (or at least I dont know), it could be that it is one manufacturer that is dominating the market. Rex 121 23.5% vanadium carbide, 4% molybdenum/tungsten carbide (M6C), Conventional Ingot vs Powder Metallurgy Carbide Structure. There are significant differences between them because 14C28N is stainless steel, while D2 steel is a semi-stainless tool steel. Vanadium carbides are very large with conventional production of steels but are very small with powder metallurgy. A hunting knife has a singlepurpose: processing meat after akill. Choose a factor below to start sorting. The most balanced is CPM-MagnaCut which is in an area all by itself on the chart. The 14C28N, on the other hand, is tougher. what does a cvn of 40 v.s 20 mean? Its high hardness and relatively high toughness also make it an excellent choice in cutlery. What would be the best deal to use I currently alternate between 20CV S35vn and D2. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Corrosion is not only cosmetic. H2 Steel is a combination of iron and carbon with other elements. quite possibly the best steel youll find on a sub-$30 production knife. Many steel ratings articles pay lip service to the importance of heat treatment without providing examples. The greatest living knifemaker and one of the greatest knifemakers of all time, Michael Walker, calls AEB-L one of his favorite steels. second it might be of importance which way you sharpened because if against the edge the steels might have reacted differently to the contamination remaining on the edge. Its probably in between Vanadis 8 and 10V. Thank you for such a great article! Because of its difficulty in sharpening and machining, its very rarely used and comes with a high price premium. Ease of sharpening refers to how difficult it is to remove material with a sharpening stone. My test is for comparing different steels, not necessarily for a go/no go test for saltwater applications. Any thoughts how Sleipner might fare in the ratings? I reserve the right to change my ratings based on new information. Without any confusion, you can purchase this set that has a slim, versatile, modified drip-point blade with good slicing capabilities. Almost all consumer-grade pocket knives, EDC knives, fixed blade knives, etc will be in the range of a Rockwell Hardness rating of 54 to 65 HRC. Anthony Sculimbrene authors the blog EverydayCommentary.com. If you have a favorite steel, rock on! Check out theGiantMouse Vox/Anso ACE Iona Liner Lock Knife at $99, for example. The Sandvik 14C28N has a very thin and sharp blade that is perfect for slicing through things. While some are into that type of thing, if youre familiar with a specific steel and want to compare it with another, you should definitely click on that button below. I can also say from personal experience that marine grade plywood will chaw up your saw blade and battery a lot quicker than standard plywood, but that probably says more about the glue that was used than the wood. But yes, I would assume that the general performance would still be relatively similar between them without evidence to the contrary. D2 has been around for more than 20 years, an eternity in metallurgy terms. Mostly it has been presented piecemeal with all of the studies that we have done on optimizing heat treatments of different steels like CPM-CruWear, AEB-L, 52100, etc. So, its hard steel is easy to sharpen. [Steel Knife Review], Best survival knife sword: 5160 steel Review, What is VG 10 pocket knife? In my experience, it will tarnish and discolor quickly. Why do you give a coin with a knife as a gift? BD1 isnt terribly hard but sharpens easily. Hi Larrin, thanks so much for writing this blog and putting so much reliable information into such an accessible form. Here, we break down how to choose a flashlight, including best flashlight LEDs, batteries, designs, and more. I know that one does not normally make knife blades of titanium, but I gather that Ti is extremely corrosion resistant, used for saltwater applications, etc. Almost all of the knives in my EDC rotation are Spydercos, in exotic steels. 14C28N Vs D2 . 14c28n has less carbon and chromium as compared to 9Cr steel. It will take you more time and energy to get a sharp edge, but your efforts will pay off because the blades hold the edge longer. Steels that are higher in hardness and wear resistance are usually lower in toughness. Thanks to its very high hardness (64-66 HRc compared to the average of 58-62 HRc), ZDP-189 can be ground thinner and sharpened less often. On the other hand, 9cr18mov has a slightly higher molybdenum content which gives it higher hardness from quenching and helps drive carbide formation. CPM-S90V, CPM-S110V, CPM-10V, and Bohler K390 each fit in this category. And Ive done a lot of experimental work on knife steels where I feel more confident in my own ratings. Sandvik later came out with 14C28N which is a slightly improved version of 13C26. 440A Properties: 14C28N: D2: Edge retention: 4/10: 7/10: Ease of sharpening: 6/10: 3/10: Corrosion resistance: 4/10: 4/10: Toughness: 6/10: 6/10: CIVIVI Knives Elementum Folding Pocket Knife 2.96" D2 Satin Blade . For example, below is a video comparing a 1095 ESEE knife at 55-57 Rc and a MagnaCut knife at 62.5 Rc, both with the same edge angle. Its so high in hardness that Maxamet knives usually ship with desiccating packages. And steels with at least 10% chromium are probably stainless, except for several important exceptions like D2 and ZDP-189. Sure if you dont want stainless steel fine, but there are plenty other carbon steels out there much better than 5160. 1095. However, even in this case there is the complicating factor of carbide and abrasive hardness. AEB-L is a non-powder steel produced by Swedish steelmaker Uddeholm. We use a subsize, unnotched chapy test with 2.5 x 10 x 55 mm dimensions. Fine-carbide knife steels. There seem to be a lot of modern steels that get related to D2, but OTOH just saying a steel is similar to D2 seems to kill interest in it. Though technically not a stainless steel due to its composition, in use it performs exactly like one. Deburring of edges often takes even longer than removing material to produce the edge. Find your right answers here! Lately Ive been edcing one of those instead of a nice folder. There is an acceptable range for every element so this doesnt mean that 1084 will always have exactly 0.84% carbon. Among Vancron SuperClean, Agomi #1 and Shirogami #1, Which one tends to have finer grain size and Sharper edge? Read about my tests in this article. But if you want to know what the coolest blade material is, for my money, SM100is it. The main downside is the steel is more difficult to heat treat and cant go harder than about 60 or perhaps 61 Rc. and why would anyone want to use it when 420HC looks so much better for a simple stainless steel option.
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