DYNAFLEX VAC-ARC steel is a medium alloyed, air hardening ultra high strength grade. It is produced by consumable electrode vacuum melting which provides superior cleanliness, elimination of dissolved gases and preferred ingot structure. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as heat treating. Filing Code: TS-144. Producer or source: Latrobe Steel Company. Originally published as Dynaflex, February 1964, revised December 1991.