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.MIRROMOLD is a case-hardening mold steel designed expressly for cold-hobbed cavities. It is a vanadium-treated, cold-melt, electric-furnace mold steel developed to provide: (1) Cleanness and uniformity, (2) Maximum hobability and (3) Uniform response to heat treatment.