Monel 400 (UNS N04400) Seamless Pipes & Tubes Manufacturer & Supplier
Monel 400 (UNS N04400) is a nickel-copper alloy with excellent resistance to seawater, hydrofluoric acid, and many reducing acids. The combination of nickel and copper creates a material that is virtually immune to chloride stress corrosion cracking, making it the industry standard for marine and seawater applications.
UNS: N04400 | Category: Nickel-Copper Alloy | Werkstoff Nr: 2.4360 | EN Name: NiCu30Fe
Monel 400 — Also Known As
Monel 400 is also commonly known as Monel 400, 400 Monel, Monel 400 (UNS N04400) Seamless Pipes & Tubes, N04400, UNS N04400, 2.4360, Werkstoff 2.4360, W.Nr 2.4360, NiCu30Fe, alloy 400, nickel alloy 400.
Monel 400 — Applicable Standards & Specifications
Monel 400 is commonly supplied to ASTM B165, ASME SB165, ASTM B163, ASME SB163, ASTM B725, ASME SB725, ASTM B730, ASME SB730.
Size Range
Outer Diameter: 1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness: SCH 5S to SCH 80S
Chemical Composition (%)
| Ni | Cu | Fe | C | Mn | Si | S |
|---|---|---|---|---|---|---|
| 63.0 min | 28.0-34.0 | 2.5 max | 0.30 max | 2.00 max | 0.50 max | 0.024 max |
Mechanical Properties
- Tensile Strength
- 517 MPa min
- Yield Strength
- 172 MPa min
- Elongation
- 35% min
- Hardness
- N/A
Physical Properties
- Density
- 8.80 g/cm3
- Melting Range
- 1300-1350 C
- Thermal Conductivity
- 21.8 W/m-K
- Electrical Resistivity
- 510 nOhm-m
- Specific Heat
- 427 J/kg-K
- Coeff. of Thermal Expansion
- 13.9 um/m-C
Corrosion Resistance
- Pitting Resistance (PREN)
- N/A (Ni-Cu alloy)
- Max Service Temp (Oxidizing)
- 480 C
- Intergranular Corrosion
- Resistant
- Stress Corrosion Cracking
- Excellent in most environments
- General Corrosion Rate
- Excellent in reducing acids and seawater
- Seawater Resistance
- Outstanding - industry standard
Applicable Standards
- ASTM B165 / ASME SB165
- ASTM B163 / ASME SB163
- ASTM B730 / ASME SB730
- DIN 17751
Applications
- Seawater piping and valves
- Marine heat exchangers
- Crude oil distillation columns
- Hydrofluoric acid processing
- Feedwater heaters
- Brine handling and deaeration
Industries Served
- Marine
- Oil & Gas
- Chemical Processing
- Power Generation
- Desalination
Key Advantages
- Outstanding seawater and marine corrosion resistance
- Excellent resistance to hydrofluoric acid (HF)
- Immune to chloride stress corrosion cracking
- Good resistance to reducing acids and alkalis
- Proven track record in marine service exceeding 50 years
- Good mechanical properties from cryogenic to moderate temperatures
Equivalent Grades
- ASTM
- N04400
- Trade
- Monel 400
- DIN
- 2.4360