Abstract UCI-390 is the casting grade equivalent to alloy UNS N08811. The alloy is stable at high temperatures, weldable, and resistant to thermal gradients. UCI-390 is widely used in thermal shock applications. It is corrosion resistant in air, oxidizing and reducing flue gases, carburizing gases, salts, and molten metals. The alloy performs satisfactorily up to 1150 C (2100 F) in oxidizing atmospheres and up to 1095 C (2000 F) in reducing atmospheres, provided that limiting creep-stress value are not exceeded. This datasheet provides information on composition, physical properties, and hardness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-824. Producer or source: Ultra-Cast Inc.