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.FAGERSTA K825 is a tough, shock resistant alloy steel having high tensile strength and endurance limit in the heat treated condition. It is recommended for shafts, bolts, countershafts, etc. in moderately stressed applications.