Jiangyin Chengxin Alloy Material Co., Ltd ，
Jiangsu Xiangcheng Supply Chain Management Co. LTD
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Monel 400 UNS N04400 Super Alloy The Best Choice for Heat Exchangers in Corrosive Conditions
Monel 400 is recognized for its high strength, toughness, and outstanding resistance to a wide range of corrosive environments. It is a nickel-copper alloy that can only be hardened by cold working and is widely used in marine, chemical processing, and other industries where resistance to corrosion is critical.
Monel 400 has excellent resistance to many corrosive media, including hydrofluoric acid, seawater, and various acidic and alkaline solutions. The alloy maintains high strength and toughness over a wide temperature range. It has good weldability, allowing it to be joined using various welding processes. Monel 400 can be easily formed and machined using standard methods.
Trade Code
| GB | ASTM | W.Nr. |
| NS 6400 | UNS 04400 | 2.4360 |
| Chemical Composition Wt.% | % | Ni | Cu | Fe | C | Mn | Si | S |
| Min | 63 | 28 | ||||||
| Max | 34 | 2.5 | 0.3 | 2 | 0.5 | 0.024 |
| Physical Constants | Density(g/cm³) | 8.83 | |||||
| Melting Range(℃) | 1300-1390 | ||||||
| Minimum mechanical properties of alloy at room temperature | Typical mechanical properties | Tensile strength Rm N/mm² | Yield strength RP 0.2 N/mm² | Elongation A5 % | ||||
| Annealing treatment | 480 | 170 | 35 | |||||
Some key features of Monel400 include:
Monel 400's combination of corrosion resistance, strength, and versatility makes it ideal for use in a wide range of industries, particularly in marine, chemical, and high-performance applications.
Applications:
Propeller Shafts: Due to its excellent resistance to corrosion and wear in seawater, Monel 400 is commonly used for propeller shafts, hulls, and other underwater components.
Marine Fasteners: Corrosion-resistant fasteners for boats, ships, and other marine vessels.
Sea Water Pumps: Components exposed to seawater, including pumps, valves, and other critical parts.
Piping and Valves: Ideal for piping systems, valves, and fittings in chemical plants, particularly where exposure to aggressive chemicals or corrosive environments is common.
Heat Exchangers: Used in the manufacture of heat exchangers due to its resistance to both corrosion and high temperatures.
Turbine and Engine Components: Used in critical parts such as fuel lines, valves, and other components exposed to high temperatures and pressure.
Instrument Components: Parts for aerospace instrumentation requiring high strength and corrosion resistance.
Offshore Equipment: Parts used in offshore oil drilling, including valves, pumps, and tubing that must withstand harsh conditions.
Gas Processing Equipment: Components in gas processing systems where corrosion and fatigue resistance are critical.
Connector Pins: Monel 400 is used in electrical connectors and pins due to its excellent conductivity and resistance to corrosion.
Batteries: Some battery components, such as terminals and connectors, are made from Monel 400 for its strength and corrosion resistance.
Surgical Instruments: Due to its biocompatibility and resistance to corrosion, Monel 400 is used in surgical instruments and implants.
Dental Alloys: Used in dental alloys for its strength and durability.
Boiler Tubes: Monel 400 is used for manufacturing boiler tubes and other heat-resistant components.
Steam Generators: In power plants where resistance to both heat and corrosion is needed.
Processing Equipment: Used in the food and beverage industry for components that require both cleanliness and resistance to corrosion.
Exhaust Systems: Certain high-performance exhaust systems incorporate Monel 400 for its high-temperature resistance.
Cryogenic Tanks and Equipment: Monel 400’s resistance to low temperatures makes it suitable for use in cryogenic applications, such as LNG tanks and cryogenic valves.
Monel 400’s combination of strength, corrosion resistance, and versatility makes it a critical material across many industries, particularly where high-performance, long-lasting materials are needed in aggressive environments.
