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.LESCALLOY 718 VacArc is a precipitation hardening nickel-base super alloy designed for service at elevated temperatures up to 1300 F where high strength coupled with good ductility and corrosion resistance are required.