Allvac 13-8 Super Tough alloy is a modification of the standard Allvac 13-8 alloy. (See Alloy Digest SS-866, November 2002.) 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 superior fracture toughness and Charpy impact energies. This martensitic precipitation-hardening stainless steel has very good resistance to general corrosion and stress-corrosion cracking. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-876. Producer or source: Allvac.