UNS No. G10780 is a plain carbon steel; it has low hardenability and a high carbon content (nominally 0.78%). It can be hardened by quenching into oil or water from the austenitizing temperature; care must be exercised to prevent cracking when quenching into water. This steel develops high surface hardness and a soft core on quenching and tempering lightly. It has good wear resistance. Its many uses include agricultural equipment, tools, springs, and machinery parts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: CS-105. Producer or source: Carbon steel mills.