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.Crucible 422 has a structure of tempered martensite to give the alloy high strength. It is useful in the aerospace industry for structurals with high strength/weight ratios.