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.AlcoTec weld filler wire 4145 is a general-purpose high-silicon-containing wire for both welding and brazing. The alloy is often used instead of 2319 for welding higher-strength alloys because of its low melting temperature and high fluidity.