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.STRESSPROOF is a medium carbon-manganese resulfurized free-machining steel. It is a heavy-drafted, cold drawn, straightened and stress relieved bar steel with high strength, improved fatigue resistance, and excellent machinability. It does not require heat treatment after fabrication.