First sticking with the 'especially interested'. Of them, D2 tool steel is the most wear resistant and least impact resistant in typical knife hardness. Higher chromium content gives a decent level of passivity (almost stainless) along with the moly and vanadium to form hard carbides. O1 and A2 tool steels have similar impact resistance; A2 has higher wear resistance. These three are tool steels of AISI designation and made by many foundries. 12C27 is stainless, good toughness, not a lot of wear resistance, lacking large carbides, and is a 'knife' steel designed & made by Sandvik.
The others - L6 is generally a fair bit tougher (impact resistance), wear resistance still on the lower end, not much in the way of corrosion resistance. 3V is also very tough, wear resistance around D2, more chromium than A2 and some resistance to oxidation. S30V, stainless, similar level of toughness to D2 at appropriate hardness, more wear resistant. Those two CPM steels are Crucible manufactured. VG10 and 3G are Takefu stainless knife steels. Well, 3G is actually a laminate of Super Gold between VG2 sides. The Super Gold has 10 times the vanadium of VG10, but that is still half of S30V's.
