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.UCI-170 (HL) is similar to HK material, but additional chromium provides better resistance to hot gas corrosion, particularly sulfidation. This alloy is used extensively for tube supports, hangers, and tube sheets. Alloy UCI 170 (HL) also possesses high-temperature strength, useful for service where excessive scaling must be minimized.