Regent Vac-Arc is a deep hardening alloy steel used in high performance aircraft bearings and other high load applications where premium quality steel is required. This grade is produced by the vacuum consumable electrode melting process and offers greatly improved cleanliness and internal soundness over conventionally air melted bearing quality SAE 52100. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-188. Producer or source: Latrobe Steel Company.