ASTM B165/B725/B730 Monel 400 UNS N04400 Pipe and Tube
Monel 400 Pipe and Tube: High-Performance Alloy for Extreme Environments
Introduction to Monel 400
Monel 400 is a solid-solution nickel-copper alloy known for its exceptional resistance to seawater, acids, and high-temperature environments. Composed primarily of nickel (≈63%) and copper (≈30%), with small amounts of iron, manganese, carbon, and silicon, Monel 400 exhibits excellent mechanical properties even in sub-zero temperatures and remains highly resistant to corrosion, stress cracking, and erosion in harsh chemical conditions.
As a result, Monel 400 pipe and tube products are widely used in marine engineering, chemical processing, oil and gas, power generation, and heat exchanger systems. Their durability and non-magnetic properties also make them suitable for military and aerospace applications.
| Specifications of Monel 400 Pipe Tube: |
| Size | 15"NB TO 150"NB IN |
| Standards | ASTM / ASME SB 163 / 165 |
| Range | 6.35 mm OD upto 254 mm OD in 0.6 TO 20 mm thickness. |
| Length | Double Random, Single Random, Cut Length |
| Type | Seamless, Welded, Fabricated, ERW / CDW |
| Form | Round, Rectangular, Hydraulic, Square |
| Grades | Monel 400 (UNS No. N04400) Pipes & Tubes. |
| Monel 400 Seamless Pipes & Tubes: B 161 / SB 163 | |
| Monel 400 Welded Pipes & Tubes: B 725 / SB 775 |
| Mechanical & Physical Properties & Chemical Composition: |
| STANDARD | WERKSTOFF NR. | UNS | JIS | AFNOR | BS | GOST | EN |
| Monel 400 | 2.4360 | N04400 | NW 4400 | NU-30M | NA 13 | МНЖМц 28-2,5-1,5 | NiCu30Fe |
| Monel 400 | Ni | Fe | C | Mn | Si | Cu | Al | S |
| 63.0 min | 1.0 - 2.5 | 0.3 max | 2.0 max | 0.5 max | 28.0 - 34.0 | 0.50 max | 0.02 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80,000 , MPa – 550 | Psi – 35,000 , MPa – 240 | 40 % |
| Standards and Specifications: |
- ASTM B165 (Seamless Pipe & Tube)
- ASTM B725 (Welded Pipe)
- ASTM B730 (Welded Tube)
- ASME SB165 / SB725 / SB730
- ISO 6207 / EN standards
| Applications of Monel 400 Pipe and Tube: |
Marine Engineering:
- Sea water desalination units
- Piping systems on ships and submarines
- Heat exchangers in coastal facilities
Chemical and Petrochemical:
- Acetic acid and hydrofluoric acid piping
- Reactor tubing and distillation columns
- Sulfuric acid alkylation units
Oil and Gas Industry:
- Offshore drilling platforms
- Sour gas pipelines
- Downhole tubing and safety valves
Aerospace and Defense:
- Jet engine components
- Missile and torpedo systems
- Hydraulic and fuel lines
Power Generation:
- Nuclear fuel reprocessing systems
- Steam generator tubing
- Condenser pipes
| Key Advantages of Monel 400 Pipe and Tube: |
- Exceptional resistance to saltwater and brine
- Withstands high-velocity seawater without erosion
- Excellent resistance to hydrofluoric, sulfuric, and hydrochloric acids
- Maintains strength and ductility across a wide temperature range
- Non-magnetic properties suitable for military and electronic use
- High weldability and machinability
| Welding and Fabrication: |
Monel 400 can be welded using conventional techniques, including:
- Gas tungsten arc welding (GTAW)
- Gas metal arc welding (GMAW)
- Shielded metal arc welding (SMAW)
Matching filler metals such as ERNiCu-7 are used. Pre-cleaning and post-weld annealing may be required.
| Surface Finish Options: |
- Pickled and passivated
- Bright annealed
- Polished (mirror finish)
- Coated for added protection
| Testing and Quality Assurance: |
- Dimensional inspection
- Hydrostatic and ultrasonic testing
- PMI and chemical analysis
- EN 10204 3.1 / 3.2 certification
- Third-party inspections from SGS, TUV, BV
| Why Choose Us: |
1. You can get the perfect material according to your requirement at the least possible price. 2. We also offer Reworks, FOB, CFR, CIF, and door to door delivery prices. We suggest you to do deal for shipping which will be quite economical. 3. The materials we provide are completely verifiable, right from raw material test certificate to the final dimensional statement.(Reports will show on requirement) 4. e guarantee to give a response within 24hours(usually in the same hour) 5. You can get stock alternatives, mill deliveries with minimizing manufacturing time. 6. We are fully dedicated to our customers. If it will not possible to meet your requirements after examining all options, we will not mislead you by making false promises which will create good customer relations.
| Packaging and Delivery: |
- Plastic-capped ends
- Anti-corrosion film wrapping
- Wooden crate packing
- Full export documents including invoice, packing list, CO, MTC
