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.Allvac 13-8 Super Tough alloy is a modification of the standard Allvac 13-8 alloy. (See Alloy Digest SS-866.) It has good fabricability and can be age hardened by a single treatment in the range 510 to 621 deg C (950 to 1150 deg F). Cold working prior to aging enhances the aging. These properties supplement the new superior fracture toughness and Charpy impact energies. This martensitic precipitation-hardening stainless steel has very good resistance to general corrosion and stress-corrosion cracking.