CENTRI-CAST GRAY IRON 30 is a centrifugally cast gray iron with a nominal tensile strength of 30,000 psi. It is produced in the form of tubing which has a wide range of uses for applications where freedom from pattern cost is an important consideration and where size and shape are of paramount importance. 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, and surface treatment. Filing Code: CI-46. Producer or source: Federal Bronze Products Inc..