Monel Alloy The Trusted Solution Monel 400/UNS N04400/W.Nr.2.4360
For Forming And Machining In Any Application
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
| 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:
- High Strength and Durability:
Monel 400 is a nickel-copper alloy known for its high mechanical
strength and resistance to corrosion, making it suitable for
demanding applications.
- Excellent Corrosion Resistance:
Outstanding resistance to seawater, acids, alkalis, and other harsh
environments, which makes it ideal for marine and chemical
processing industries.
Easily welded, machined, and formed, Monel 400 is versatile in
manufacturing processes and can be fabricated into complex parts.
- Superior Resistance to Stress Corrosion Cracking:
Unlike many other alloys, Monel 400 resists stress corrosion
cracking in seawater and high-temperature environments.
- High-Temperature Stability:
Maintains excellent strength and resistance to oxidation at
elevated temperatures, making it suitable for high-temperature
applications.
Monel 400 is non-magnetic, which makes it ideal for applications
where magnetic properties would interfere with the function, such
as in marine and electronic equipment.
Offers a high level of ductility, enabling it to be drawn into wire
or shaped into various forms without cracking or breaking.
- Resistance to Fatigue and Wear:
Monel 400 is resistant to fatigue, making it ideal for components
subject to repeated stress, such as valves, pumps, and propeller
shafts.
It is safe for use in medical devices, surgical implants, and other
applications requiring biocompatible materials.
These attributes make Monel 400 an ideal choice for industries such
as marine, aerospace, chemical processing, oil and gas, and power
generation.
Applications:
- Marine and Offshore Engineering:
Seawater Applications: Monel 400 is widely used in marine environments for components
like propeller shafts, valves, pumps, and seawater piping systems
due to its excellent resistance to corrosion in seawater.
Boat and Shipbuilding: Components exposed to harsh marine conditions, such as fittings,
fasteners, and heat exchangers.
Corrosive Chemical Environments: Used in chemical plants for equipment like heat exchangers,
reactors, and pressure vessels where resistance to acids, alkalis,
and salts is required.
Acidic Solutions: Ideal for components exposed to sulfuric acid, hydrofluoric acid,
and other corrosive chemicals.
Aircraft Engine Components: Due to its high strength and thermal stability, Monel 400 is used
in the production of aerospace components such as engine parts,
fuel systems, and valve trim.
Heat Exchangers: Used in aerospace applications requiring high resistance to both
corrosion and heat.
Petrochemical Equipment: Monel 400 is used for valves, pumps, and piping systems in both
offshore and onshore oil drilling due to its resistance to sour gas
and other corrosive substances.
Drilling Equipment: Components exposed to extreme pressures and harsh chemical
conditions.
- Marine Electrical and Electronic Components:
Electrical Connectors: Used in marine electronics for its resistance to corrosion and
electrical conductivity, particularly in harsh, salty environments.
Wiring and Terminals: Monel 400 is used for electrical components that must endure
corrosion in harsh marine conditions.
Food Processing:
Food-grade Equipment: Used in food processing equipment, such as mixers, agitators, and
heat exchangers, due to its non-toxic and biocompatible nature.
Boiler Tubing and Heat Exchangers: Monel 400 is used in high-temperature heat exchangers and other
critical systems in power plants because of its resistance to
scaling and oxidation.
- Medical and Pharmaceutical Equipment:
Surgical Instruments: Due to its biocompatibility and corrosion resistance, it is
sometimes used for surgical tools and implants.
Pharmaceutical Manufacturing: Used for piping, pumps, and reactors in pharmaceutical production
due to its resistance to corrosion in highly corrosive
environments.
- Hydrogen and Chemical Storage:
Hydrogen Peroxide Equipment: Monel 400 is used in tanks and piping for handling hydrogen
peroxide and other chemicals prone to causing corrosion.
Low-Temperature Applications: Due to its excellent low-temperature properties, Monel 400 is
used in cryogenic storage tanks and piping.
Monel 400's versatility and resistance to a wide range of
aggressive environments make it indispensable in industries that
demand high-performance, corrosion-resistant materials.
