AISI 6145 is a tough, shock resisting, shallow-hardening chromium-vanadium steel. It has high fatigue and impact resistance in the heat treated condition. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-107. Producer or source: Alloy steel mills and foundries.