AISI 4337 is a tough, shock resisting, oil hardening alloy steel. In the heat treated condition it has high fatigue and tensile strength along with good ductility. 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-110. Producer or source: Alloy steel mills and foundries.