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.DOWMETAL H is a sand casting alloy combining good corrosion resistance, good machinability with excellent mechanical properties. Commonly used in the solution heat treated condition (T4), tho alloy also responds favorably to an age-hardening heat treatment (T6).