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.VAIRLOY is a manganese-chromium-molybdenum tool and die steel capable of being air-hardened at low temperatures with minimum distortion and deformation. It is strong, tough and wear resistant.