Hello dffay, if this is for yourself I would say you could probably proceed and do as you deemed necessary to resurrect this piece. If it's for someone else I would have reservations. First off I would check it to see if it is hardened at all, take a file and file off some material in an inconspicious spot to determine this, if it doesn't appear to be hard, I would likely use either some ER70 S-2 or ER70 S-6. If it's hard you would probably need to see about annealing it first and then look into hardening and tempering after you finished the welding and clean-up. Just a few thoughts to consider. Regards, aevald