A sharpening Vent...

[grunt soldier]

i just bought a Spyderco Sharpmaker, that solved everything.

lol not with d2 it didn't. the sharpmaker won't even touch d2, believe me i tried. even the diamond stones don't help much. it will be wore out so quick.

 

[rhino]

Some steels I just have never been able to sharpen well. I don't think I have ever gotten an edge to my satisfaction (that was not quickly dull) with 440 stainless...

I've had good luck with 440A (assuming a good heat treatment). It won't hold the edge long, but it will take a decent edge.

I've not encountered anout 440B to make a judgement.

440C is (in my opinion) the most overrated knife steel on the market. I know some people are happy with it, but the grain and carbide sizes are too large to get the kind of sharpness I prefer.

The worst, though, has to be 420J2, especially with the non-existent heat treatment it usually has. In my opinion, 420J2 is ornamental or for structural pieces, not working knife blades.