1. Monel Bar, Monel Round Bar, Monel K 500 2. Valves, Pumps, Shafts, Fittings, Fasteners 3. UNS N04400 ... sea water, hydrofluoric acid, sulfuric acid, and alkalies. Used for marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings ...