Nickel and nickel alloys · Alloy 400 / Monel 400 / UNS N04400 / 2.4360
Monel 400 Alloy (UNS N04400): Technical Passport and Application Areas
Engineering Parameters and Properties of Monel 400 Alloy
| Types of rolled products | Alloy name | Main standards | Main standards | DIN | BS | ISO | |
|---|---|---|---|---|---|---|---|
| Pipes, sheets, plates, strips, bars, wires, strips, hexagons, forgings, fittings, flanges | Alloy 400, Monel 400, VDM Alloy 400, Nicorros, UNS N04400 | ASTM | ASME | Analogs | Analogs | ||
| Pipes, sheets, plates, strips, bars, wires, strips, hexagons, forgings, fittings, flanges | Alloy 400, Monel 400, VDM Alloy 400, Nicorros, UNS N04400 | B 127, B 163, B 164, B 165, B 366, B 564, B 725, B 730 | SB 127, SB 163, SB 164, SB 165, SB 564 | W.Nr. | 17743, 17750-17754 | NA 13 - 3072, 3073, 3074, 3075, 3076 | NiCu30 - 6207, 6208, 9722, 9723, 9724, 9725 |
| Pipes, sheets, plates, strips, bars, wires, strips, hexagons, forgings, fittings, flanges | Alloy 400, Monel 400, VDM Alloy 400, Nicorros, UNS N04400 | B 127, B 163, B 164, B 165, B 366, B 564, B 725, B 730 | SB 127, SB 163, SB 164, SB 165, SB 564 | 2.4360, 2.4361 | 17743, 17750-17754 | NA 13 - 3072, 3073, 3074, 3075, 3076 | NiCu30 - 6207, 6208, 9722, 9723, 9724, 9725 |
| 2.4360, 2.4361 |
Monel 400, also known as Alloy 400 or UNS N04400, is a solid solution nickel-copper alloy developed for operation in extreme conditions. Its key feature is outstanding resistance to a wide range of corrosive agents, from seawater to acids. EV Group China supplies this material, which is indispensable in the production of critically important, highly loaded industrial components.
Chemical Composition of Monel 400 Alloy (UNS N04400), %
| Ni | ≥63.0 |
|---|---|
| Cu | 28.0-34.0 |
| Mn | ≤2.0 |
| C | ≤0.3 |
| Si | ≤0.5 |
| S | ≤0.024 |
| Fe | ≤2.5 |
Mechanical Properties of Monel 400 under Normal Conditions
| Tensile Strength | Yield Strength (0.2%) | Elongation |
|---|---|---|
| 80 ksi | 35 ksi | 40 % |
| 550 MPa | 240 MPa | 40 % |
Monel 400 alloy, supplied by EV Group China, demonstrates inertness when in contact with fluorine, hydrogen fluoride, and hydrofluoric acid. The material has high resistance to alkaline environments, seawater, and unconcentrated solutions of sulfuric and hydrochloric acids, which confirms its suitability for the chemical industry.
Fundamental Physical Properties of the Alloy
The density of Monel 400 alloy is 8.80 g/cm³.
Thermophysical and Mechanical Parameters
| Melting Range | Specific Heat Capacity | Curie Temperature | Modulus of Elasticity | Coefficient of Thermal Expansion | Thermal Conductivity | Electrical Resistivity |
|---|---|---|---|---|---|---|
| 1300-1350 °С | 427 J/kg*°С | 20-50 °С | 205 kN/mm² | 13.9 µm/m*°С (at 21-93 °С) | 21.8 W/m*°С | 0.547 µohm*m |
The unique combination of thermophysical and mechanical properties makes Monel 400 from EV Group China a key material for the production of high-performance heat exchange equipment, pump components, shut-off valves, and structures designed for operation in marine environments.
Corrosion Resistance and Weldability
The alloy demonstrates high resistance to stress corrosion cracking (SCC). For joining Monel 400 parts, inert gas arc welding methods (TIG, MIG) and plasma welding are used. Thorough surface preparation and removal of all contaminants are critically important for obtaining a high-quality weld. ERNiCu-7 wire or electrodes are recommended as welding material.
Key operational advantages of Monel 400 from EV Group China:
- Exceptional corrosion resistance in seawater and salt spray.
- Immunity to chloride stress corrosion cracking (SCC).
- Stable mechanical properties and performance at temperatures up to 550°C.
- Full compliance with international standards, including ASME and VdTÜV.
Main industrial applications of Monel 400 alloy:
- Energy sector: production of tubes for steam generators and feedwater heaters.
- Chemical and petrochemical industry: heat exchangers, reactors, and units for alkylation processes.
- Marine technologies and desalination: components for desalination plants, pump shafts, fasteners.
- Nuclear industry: equipment for uranium enrichment and isotope separation, operating in contact with uranium hexafluoride.