Weldcote 312 Is Used To Weld Cast Alloys Of Similar Composition And Is Used To Weld Dissimilar Metals And Weld Overlays. 312 Wire Is Used For High Strength And High Yield Steels, Stainless To Mild Steels And Aisi 304 Clad Stainless Steel. This Gives Very High Ferrite. When Welding Similar Cast Alloys, Limit Welding To Two Or Three Layers Only.