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ASME SB163 MONEL 400 (UNS N04400) Nickel Alloy Seamless Tube for Heat Exchanger and Condenser
The ASME SB163 MONEL 400 (UNS N04400) is a premium nickel-copper alloy seamless tube specifically engineered for critical heat transfer applications in highly corrosive environments. Manufactured to strict ASME boiler and pressure vessel code standards, this alloy combines 67% nickel and 30% copper to deliver exceptional resistance to seawater, acids (including hydrofluoric and sulfuric), alkalis, and high-temperature steam. Its unique metallurgical structure provides immunity to chloride-ion stress corrosion cracking while offering superior thermal conductivity (21.8 W/m·K) for efficient heat exchange. The product is extensively used in shell-and-tube heat exchangers, condensers, and other pressure vessels where reliability in aggressive media is paramount, particularly in chemical processing, offshore oil & gas, marine engineering, and power generation applications.
Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| Monel 400 | 2.436 | N04400 | NW 4400 | NA 13 | МНЖМц 28-2,5-1,5 | NU-30M | NiCu30Fe |
1.Chemical & Mechanical Properties
| ASME SB163 MONEL 400 Chemical Composition (%) |
| C | Mn | Si | S | Cu | Fe | Ni | Cr |
| ≤0.30% | ≤2.00% | ≤0.50% | ≤0.24% | 28.0%-34.0% | ≤2.50% | ≥63.00% |
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Mechanical Properties
| Property | Standard Value |
| Tensile Strength | 550 MPa (80 ksi) |
| Yield Strength (0.2% offset) | 240 MPa (35 ksi) |
| Elongation | 40% in 50mm |
| Hardness (Brinell) | 65-90HRB |
| Melting Point | 1350℃ (2460℉) |
2. Key Adventages
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Superior Corrosion Resistance
Excellent seawater resistance - Ideal for desalination, marine and offshore applications
Resists acids/alkalis - Performs well in sulfuric acid, hydrofluoric acid and alkaline environments
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Outstanding Mechanical Properties
Wide temperature range: Maintains properties from -196°C to 480°C
High strength & ductility: Tensile strength ≥480MPa, elongation ≥35%
Multi-standard certified: Complies with ASME SB163, ASTM B163/B165, etc.
Rigorous QC: Includes EN 10204 3.1/3.2 material certificates
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Application-Oriented Design
High thermal conductivity (21.8 W/m·K) for efficient heat transfer
Custom solutions: U-bending, special sizes & surface finishes available
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Long-Term Cost Efficiency
Extended service life: Corrosion resistance reduces replacement needs
Low maintenance: Resists biofouling, minimizing cleaning costs
3. Key Applications
Offshore platform heat exchange systems: Seawater coolers, crude oil heaters
Gas processing equipment: Amine exchangers, sour gas condensers
Subsea pipeline systems: Heat transfer components for subsea equipment
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Chemical & Petrochemical Industry
Strong acid media exchangers: Sulfuric/HF acid production equipment
Chlor-alkali industry: Electrolyzer heat transfer parts
Polymer production: High-temperature monomer condensation systems
Nuclear plants: Steam generator U-tubes, spent fuel cooling systems
Thermal power plants: FGD system heat transfer components
Geothermal power: High-salinity geothermal fluid handling equipment
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Desalination & Marine Engineering
MED plants: Evaporator tube bundles, brine heaters
RO systems: High-pressure seawater pre-treatment exchangers
Marine systems: Engine coolers, ballast water treatment units
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ASME SB163 MONEL 400 (UNS N04400) Nickel Alloy Seamless Tube for Heat Exchanger and Condenser Images
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