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.AISI 8637 is a triple-alloy steel that can be hardened by quenching in oil or water; however, care must be exercised to prevent cracking in water hardening, especially if the work piece has sharp corners or drastic dimensional changes. This steel has moderate hardenability with relatively high strength and toughness. It is used in the quenched-and-tempered condition for a wide variety of components, parts and tools.