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.HWD No. 1 is a chromium-molybdenum-tungsten alloy hot work steel developed for applications where dies or tools are subject to heavy pressure or impact while in contact with hot metal.