AISI C1080 is a high carbon, water or oil hardening tool and spring steel having medium hardness penetration. It is recommended for general purpose tools, springs, and machinery parts requiring high hardness and wear resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-17. Producer or source: Carbon and alloy steel mills.