1. Monel, Monel 400, Monel 400 Rod 2. Valves, Pumps, Shafts, Fittings, Fasteners, Heat Exchangers 3. UNS N04400 4. ASTM, ... . Used for marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fasteners, and heat exchangers.Limiting Chemcial CompositionNi 63 ...