looking at the edger blades, they are so close to being a knife I see why alot here have made knives from them, I would say that if you were carefull and don't get your metal to hot when cutting it in to shape and alot of handtools you could get by and not worry about annealling and heat treating. thats how I started before I had a forge,of course didn't have edger blades but had a lot of swing blades so a little hacksaw work a little fileing and a lot of hand sanding.