View Sample Alloy Digest Data Sheet (PDF)Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.Inconel Filler Metal 72 is used for gas tungsten arc welding of Inconel alloy 671 (Alloy Digest Ni-180) or Incoclad 671/800 tubing (Alloy Digest Ni-544). The alloy is resistant to flue gas corrosion.