I am trying to join 1/4 inch od tube Inconel 600 to 316 stainless hex fitting. These two metals have a tendency to crack when welded togeather. Any thoughts on the best filler material to use, or maybe preheating the materials... We are welding these on a turret at first by using Plasma welder (no filler material) but as stated they crack in the weld joint. We are going to try 309L filler material on a tig turret and see how that goes, but any further help would be welcome.
Gat
Gat