TomAiello wrote: ↑
Thu May 28, 2020 6:07 am
If you want the longest lasting edge, Maxamet is the way to go. Nothing else in current production knives (from any manufacturer) really comes close.
Rex 45 (aside, 'Rex' is a poor description--when I first read this post I thought it was a discussion of Rex 121 v Maxamet) won't hold an edge as long as Maxamet, but generally has more edge stability (meaning it is more resistant to damage).
It seems like you have a lot of questions about steel, but maybe you need to resolve your questions into more precise terms.
Wear resistance, toughness and corrosion resistance are all different qualities of blade steel, and can vary widely for different steels. The steel with the best wear resistance is often not going to be the toughest (and vice versa). By spending more money, you can improve all three qualities, but at the top end, there is no "magic" steel that wins in all three categories.
For a folding knife where corrosion resistance isn't an issue, it's hard to beat Maxamet for long term edge holding (it will stay sharp the longest, basically). If you're just looking for the knife that will stay sharp longest, buy yourself a Maxamet Native or Manix 2 and be happy.
If you're going to pry or torque on the blade (cutting hard things like staples, twisting to break things like zip ties, or cutting through things with hard chunks like asphalt roofing tiles), I'd go with something tougher. If that's what you're looking for, you'll be happier with Rex-45 than Maxamet, but personally I'd go with something even tougher for those kind of tasks. If you still want good edge holding, then look at 4v, Cruwear or even 3v (in order from best edge holding/least toughness to best toughness/least edge holding).
If you want super stainless and long term edge holding, but aren't worried about toughness, then look at s110v. If you still want stainless, but are willing to forgo a little of the edge holding for more toughness, look at s90v.
In terms of regular production knives (so you're not chasing sprints and exclusives) I'd recommend you look at either Maxamet (stays sharp forever but not stainless) or s110v (stays sharp half of forever and is super stainless).
The only reason to venture beyond these for an average user is a requirement for increased toughness, in which case you're looking at sprint and exclusive (i.e. harder to find) knives. If you're going down that road, then Cruwear is likely to be the best balance of these properties for you, so maybe look at the upcoming Z-wear Shaman sprint (Z-wear and Cruwear are essentially the same steel). Or grab something in Rex-45 while they're still reasonably available, or maybe try K390 (the whole Seki family is upcoming in that steel, which has a nice balance of really long edge holding with a little more toughness than Maxamet).