XTR Nickel alloy 55 is used for TIG and MIG welding of gray iron castings, cast iron and joining cast iron to mild steels, stainless-steel alloys and come copper alloys. It can also be used for overlay and build-up applications. Dilution from the casting influences the mechanical properties of the metal. A preheat and inter-pass temperature of at least 350°F (175°C) is required before welding on cast iron to minimize the potential for cracks during and after the weld cools.
