N04400 nickel-copper alloy, mainly containing nickel and copper, with a small amount of other elements, has high corrosion resistance, mechanical strength and ductility, and is suitable for chemical, marine engineering, aerospace and food processing industries.
N04400 is a nickel-copper alloy material, also known as Monel 400. It is mainly composed of high-purity nickel and copper and contains small amounts of elements such as iron, manganese, silicon, titanium, aluminium, carbon, sulfur and phosphorus.
Chemical Composition of UNS N04400 (Monel 400)
UNS N04400, commonly known as Monel 400, is a nickel-copper alloy with excellent corrosion resistance and mechanical strength. The alloy mainly consists of nickel and copper, with small amounts of iron and manganese.
Typical chemical composition of Monel 400 includes:
Nickel (Ni): approximately 63–70%
Copper (Cu): approximately 28–34%
Iron (Fe): ≤ 2.5%
Manganese (Mn): ≤ 2.0%
Carbon (C): ≤ 0.3%
This combination of nickel and copper provides excellent resistance to seawater corrosion, acids, and alkaline
Key Properties of N04400 Materialenvironments.
UNS N04400 offers a unique combination of corrosion resistance, strength, and durability. Because of these properties, Monel 400 is widely used in demanding industrial environments.
Key properties include:
- Excellent resistance to seawater and marine atmospheres
- Good resistance to acids and alkaline solutions
- High mechanical strength across a wide temperature range
- Good weldability and machinability
- Strong resistance to stress corrosion cracking
These characteristics make N04400 suitable for long-term use in harsh industrial environments.
Precise control of these elements helps ensure the stability and consistency of the alloy.
Physical and mechanical properties
N04400 alloy has a series of excellent physical and mechanical properties, including:
Density: about 8.83 g/cm³, which makes it have high density and weight.
Melting point: about 1300-1350 ℃, indicating that the alloy can still maintain stability at high temperatures.
Thermal conductivity: about 13.4 W/(m·K) (some data indicate 21.8 W/m·K), indicating that the alloy has good thermal conductivity.
Linear expansion coefficient: about 13.9 μm/m·K (some data indicate 13.3 x 10^-6/degree Celsius), which means that when the temperature changes, the length of the alloy will change accordingly.
Elastic modulus: about 179 GPa, indicating that the alloy has a certain elasticity and can return to its original shape after being subjected to force.
Regarding mechanical properties, the tensile strength σb of N04400 alloy is ≥480 MPa, the yield strength σb is ≥195 MPa, the elongation δ is ≥35%, and the hardness is HB 135-179. These properties enable the alloy to exhibit good strength and toughness when subjected to load.
Characteristics
N04400 alloy has the following main characteristics:
Excellent corrosion resistance: The alloy performs well in harsh environments such as seawater, salt water, various acids (such as hydrofluoric acid, and sulfuric acid) and chemical solvents, and can maintain good performance even under high temperatures and pressure.
Good mechanical strength and ductility: N04400 alloy has excellent corner bending performance and can maintain high strength and stiffness even under extreme temperatures and pressures.
Thermal stability: It can be used for a long time at high temperatures without deformation or fracture.
Good resistance to thermal expansion: When the temperature changes, it will not produce excessive stress due to thermal expansion.
Application Areas
Due to the excellent properties of N04400 alloy, it is widely used in many fields, including:
Chemical and petrochemical: used to manufacture heat exchange equipment, boiler feed water heaters, pipelines, containers, towers, tanks, valves, pumps, reactors, etc.
Marine engineering: used for marine crude oil extraction, diving equipment, offshore oil platforms, etc.
Aerospace industry: used to manufacture jet engines, aerospace devices, etc.
Food processing industry: used for saltwater treatment and food processing equipment, etc.
In summary, N04400 is a nickel-copper alloy with excellent corrosion resistance and high-temperature performance, which plays an important role in many industrial fields.
Typical Applications of Monel 400 (UNS N04400)
Due to its excellent corrosion resistance and mechanical strength, Monel 400 is widely used in many industrial sectors.
Typical applications include:
- Marine engineering components
- Chemical processing equipment
- Heat exchangers and condensers
- Pump shafts and valve components
- Offshore equipment and fasteners
- Oil and gas industry components
In many cases, Monel 400 is selected when stainless steel cannot provide sufficient corrosion resistance in seawater or chemical environments.
ASTM B164 N04400 Material DOWNLOAD
Yutung Industrial has experience supplying corrosion-resistant components for demanding marine engineering projects.
For example, we produced centrifugal cast bronze bushings for the Panama Canal Authority (ACP), which operate in extremely corrosive seawater environments.
You can view the project here:
https://ytcasting.com/project/c93700-centrifugal-cast-bronze-bushings-for-panama-canal-authority-acp/
In similar applications, high-performance alloys such as Monel 400 are often evaluated due to their excellent resistance to seawater corrosion.
FAQ – UNS N04400 Material
What is UNS N04400 material?
UNS N04400 is the standard designation for Monel 400, a nickel-copper alloy known for excellent corrosion resistance and high strength in marine and chemical environments.
Is N04400 the same as Monel 400?
Yes. Monel 400 is the commercial name of the alloy, while UNS N04400 is the official material designation used in international material standards.
Where is Monel 400 commonly used?
Monel 400 is widely used in marine engineering, chemical processing equipment, heat exchangers, pumps, valves, and offshore structures where corrosion resistance is critical.
Is Monel 400 better than stainless steel?
In seawater and chloride environments, Monel 400 often provides better corrosion resistance than many stainless steels. However, the choice depends on the specific application and cost considerations.
Yutung Industrial can manufacture custom components using corrosion-resistant materials such as Monel alloys based on customer drawings and technical requirements.
We maufactured the similar materials for ACP
