If you're going to use mild steel, definitely look into the SuperQuench, Jake. It works pretty well on A-36 structural steel. For struck tools (bottom tools, top tools, drifts, etc), you really need hardness that goes deeper than case hardening.
Case hardening is only going to increasse the carbon in the first few thousandths of an inch of the surface. Its good for wear-resistance, as in abrasion, but not worth much for impact resistance since the metal below the sahllow case will still deform.
If you're going to use mild
If you're going to use mild steel, definitely look into the SuperQuench, Jake. It works pretty well on A-36 structural steel. For struck tools (bottom tools, top tools, drifts, etc), you really need hardness that goes deeper than case hardening.
Case hardening is only going to increasse the carbon in the first few thousandths of an inch of the surface. Its good for wear-resistance, as in abrasion, but not worth much for impact resistance since the metal below the sahllow case will still deform.