I tested S45VN in my 1% saltwater spray corrosion test. Chromium, Vanadium, Niobium, and Molybdenum are all “ferrite stabilizers” which means that they raise the temperature at which austenite will form, because they stabilize the typical room temperature phase of steel and iron called ferrite. Thanks to Aaron @ Gough Custom, Aaron McVay, Mark Scott, Jeffrey St. Claire, Grant Seim III, and saiiiiiii1 for becoming Knife Steel Nerds Patreon supporters! Because niobium is a strong carbide former, it wants to form carbides at very high temperatures, often in the liquid steel. If you find trouble understanding the meaning of hardness or HRC, here you can find a blog post explaining it. This is the only example of using cobalt for this purpose in a stainless tool steel that I am aware of, and is one of the biggest innovations of S110V in my opinion. The same knives in S110V are listed about 30% cheaper than the Maxamet knives of the same model. But for simple slicing tasks, this knife will go on for a seriously long time. Enter your email address to subscribe to this blog and receive notifications of new posts by email. You’ll find Maxamet on some Spyderco offerings like the Native 5 and Manix 2. If the carbides form in the liquid they are much larger then if they form during solidification of the powder. I used Jmatpro software to calculate a steel with the same compostion of 316 stainless steel : 18%Cr + 2%Mo but with replacement of nickel with only 5% cobalt and 0.5% carbon . If you are unfamiliar with the Para Military 2, this will help you get a better understanding of one of the most popular knife designs in the past 10 years. using 5% Ni instead gives Ms of about -66°C (-87°F) . Once the carbides have formed in the melt they are significantly larger than if they form during solidification of the powder, reducing toughness. Find out how you can achieve more! In terms of carbide differences, the total carbide content was slightly increased in the final version, primarily from an increase in chromium carbide (labeled M7C3 below). Maxamet is a powder steel from Carpenter, an American steel company. Get Up To 95% Off Today! S110V is designed to be heat treated between 2050 and 2150°F so the steel would need to be austenitized in that range. I don’t know how much S110V would have been made into knives before the change in composition, but it is interesting that a relatively large change was made to the steel but without a name change. Cru-Wear For reference, steels like S110V and ZDP 189 are taken up to the low 60s (maybe as high as 65 for ZDP-189). (This is not heat-related). All of this in combination with the powder metallurgy technology gives S90V a relatively fine microstructure for good toughness along with high wear resistance from the high vanadium content. I have the Maxamet LW version, the pink S30v, the Satin blade natural G10 with M4, and the original (discontinued) G10 with liners and S35vn. The cobalt content was increased from 2 to 2.5%, likely based on updated estimates of how much austenite stabilization is necessary after the changes to Nb, Cr, and Mo. You can see the difference in the micrographs below. Notify me of follow-up comments by email. I swap the parts around. The 0888MAX has an overall length of 9.125″, a 3.75″ blade, a weight of 7.56 ounces, and is made in the USA. Sharpness: Sharpening Maxamet steel, unfortunately, will be a hard task, it’s very hard steel, so sharpening won’t be easy, also for grinding if you’re a knife maker you won’t enjoy grinding Maxamet steel. $216.00. Using the numbers 0.5% carbon and 18% Cr Ms is too low for avoiding excessive retained austenite. However, the patent for S110V specifically calls out 154CM as a basis of design with its 14Cr-4Mo, providing good corrosion resistance with less Cr, and that can be seen in the initial version of S110V with 14Cr-3.5Mo.