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.UHB-ORVAR is a die casting die steel and a general hot work steel. It is air-hardening, non-deforming, and has high resistance to heat checking and erosive action.