If At all possible the deal with from the weld would be the steel or backing side from the joint. The backing side or steel aspect is welded to start with using the compact diameter electrode for the root move to insure entire penetration. Additionally, the look of various metal https://www.geto.space/post/6619_inconel-625-weld-overlay-provides-a-corrosion-resistant-surface-for-industrial-e.html