CENTRI-CAST GRAY IRON 45 has a nominal tensile strength of 45,000 psi. It is gray iron cast centrifugally in the form of tubing which has a wide range of uses for applications where freedom form pattern cost is an important consideration and where size and shape are of paramount importance. Its many applications include automotive equipment, farm machinery, bushings and machine tools. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on casting, heat treating, machining, joining, and surface treatment. Filing Code: CI-50. Producer or source: Federal Bronze Products Inc..