SORBO-MAT DUCTILE IRON is a high-carbon ferrous material. It is produced in five varieties providing various combinations of strength and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on casting, heat treating, machining, and joining. Filing Code: CI-37. Producer or source: Sorbo-Mat Process Corporation.