CTS-204P comes from Carpenter’s, Micro-Melt® line. It boasts high amounts of carbon, chromium and vanadium with the addition of tungsten. The alloyed components and powder metallurgy process creates a fine, even grained carbide-rich steel that is tough and corrosion resistant.
CTS-204P is Carpenter’s equivalent of Bohler-Uddeholm M390 steel and Latrobe Duratech 20CV steel. Slightly more Tungsten(W) 0.65% instead of 0.60% in other two. CTS-204p features very high wear and corrosion resistance. Fine grained alloy, popular choice for high end folders and small fixed blades. working hardness up to 62HRC.
Excellent performance with both, coarse and high polished edges. You still need about 15° per side edge to get the best performance and edge holding. Thinner than that, and you will run into the issue with the thin edge not being able to support all those carbides to make the edge perform.
Working hardness can reach 62HRC, and most of the production knives I’ve seen are in 60-62HRC range.
Overall, it is of the best performers as far as corrosion and wear resistance go, and because of that it is a popular choice for high end, and the limited edition knives. Aside from very good edge holding ability, maintaining the edge is very easy. And one more thing worth noticing, there’s no stubborn burr forming during sharpening, therefore, there’s no risk to form a wire edge either.
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