LESCALLOY 9310 VAC-ARC is a premium-quality alloy carburizing steel produced by the vacuum consumable-electrode process. It has high hardenability, high core hardness and high fatigue strength, all of which make it ideally suited for critical aircraft-engine gears. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-396. Producer or source: Latrobe Steel Company.