HAYNES Alloy No. 90 is a high-chromium high-carbon iron-base alloy recommended for handling extreme conditions of wear, abrasion, and heat. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on heat treating and machining. Filing Code: SA-165. Producer or source: Union Carbide Corporation, Stellite Division.