Evasion, a couple of comments regarding your last post.
1.- First, and most important, relax
. All the folders you've mentioned are excellent folders and I feel represent a good value. Find one that fits your hand well and I don't think you could go wrong with any of 'em.
2- Don't assume that all Benchmades have ATS-34 blades. Most large companies' catalogs offer knives in a variety of steels. Of the knives you've mentioned, both the AFCK and the 710 can be had with M2 blades. M2 is a high speed tool steel which is much more common in the custom knife industry than in production blades, and offers improved performance over ATS-34 in terms of edge retention and toughness. It is not, however, the equal of ATS-34 where corrosion resistance is concerned which is why you see Benchmade offering their BT2 coating on these blades. I would say that CPM440V bests both of these in edge retention, but is probably not as tough as M2, nor as corrosion resistant as ATS-34. Blade steels are all about compromises. Gents- if I'm off base here please step in.
3.- As you spend more time on these forums, you'll learn (as I have) that the knowledgeable folks who contribute here are very precise when describing exactly which specific aspects of a blade are responsible for which measures of performance. Again, to use your latest post as an example, most would argue that edge retention is more the product of a steel's composition, and less attributable to a blade's geometry. On the other hand, a blade's geometry can have everything to do with how "easily" a particular blade can cut. So, except in extreme cases, edge retention is going to be less affected by blade geometry and more affected by a steel's composition. Once you've grasped that concept, then you can move on to understanding how strength and toughness in a blade are often inversely proportional
.
I should probably also mention that there are some here who would contend that this is all much to do about nothing as ATS-34, M2 and CPM440V are all modern steels which, when properly heat treated, exhibit more than acceptable levels of edge retention, toughness, etc., etc., for most normal chores.
Bottom line- edge retention is a legitimate concern because it is largely a product of the type of steel you purchase. "Ease of cutting" is less so, because, as was mentioned previously, you can modify the blade's edge through your sharpening technique to suit your preference. The best advice I can give is to use the forum's search function and keep reading the old "best steel" threads and other similar discussions. Before long you may even start to understand the Charpy v-notch test. There's an amazing amount of knowledge and info stored in here.
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Semper Fi