Sumdumguy wrote: ↑
Fri Sep 27, 2019 4:23 pm
I disagree that REX45 has more corrosion resistance than M4.
My REX45 PM2s blade was the same color as the handle within 2 hours at work. M4 on the otherhand, has only the slightest patina after a year of use.
Rex 45 has less carbon and the roughly the same chromium, you shouldn't see more rust, you should see less. The general consensus is that Rex 45 is less prone to rust than M4. My own experience, as well as others from this forum, have shown this to be true.
ferider wrote: ↑
Fri Sep 27, 2019 4:29 pm
Albatross wrote: ↑
Fri Sep 27, 2019 2:56 pm
Since Rex 45 is a slight improvement over M4 in edge retention ...
I disagree. Rex 45 is harder, but wears quicker. At least with my Spydercos.
My own testing, as well as 4 others that I'm aware of, show Rex 45 with slightly better edge retention. Maybe it's possible you got one of the "softer" ones? Maybe it's not at 66-67 hrc, but 64-65. There were a few that were found to be in the 64-65 range, it's bound to happen from time to time. If you have multiple Rex 45 knives and and find M4 stays sharp longer, then I would assume you have a stellar example of M4.