Latrobe GSN is an oil or air hardening high-carbon, high-chromium type of die steel developed to withstand the most severe abrasive action. It is a general purpose cold forming tool and die steel. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-159. Producer or source: Latrobe Steel Company.