Is cpm 20cv same as M390?

wolverine_173 said:
so 20cv vs 3v. 3v wins in everything except corrosion resistance? or does 20cv win in edge retention
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If you take them at their optimal hardnesses/ common manufactured hardnesses-- 61 for 20CV, and about 60 for 3V

3V has about twice the toughness of 20CV
20CV has around 50 to 75% more wear resistance
20CV is completely stainless, 3V will only be partially stainless-- about like D2.

Now with HT differences these numbers can be tweaked. If you push 3V to 62 and austenize for carbide formation it begins to close the gap on 20CV in wear resistance but loses alot of toughness. Most manufacturers run 3V at about 59-60 and 20cV at 60-61.

I run my 3V at 61-62 most of the time and 20cV/M390 at 62. At these levels of hardness you see big gains in wear resistance at the cost of toughness.
 
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wolverine_173 said:
so 20cv vs 3v. 3v wins in everything except corrosion resistance? or does 20cv win in edge retention
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I'm guessing you're referring to survive blades in 20CV vs 3V? 3V won't corrode after heat treat, it will oxidize but is extremely easy to clean. 20CV wont take the same amount of oxidization, but it will. Edge retention, I thinks it's too elementary to notice. As long as your CPM edge is well up kept, you won't notice a difference between the two.

https://www.youtube.com/watch?v=831oJH6F6KE
 
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