ASME SB163 / B165 MONEL 400 Nickel Alloy Seamless Tube, Heat Exchanger /Air Cooler Application
Monel 400 is a nickel-copper alloy renowned for its exceptional corrosion resistance and mechanical strength, particularly in aggressive environments. Alloy 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength. A low corrosion rate in rapidly flowing brackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to a variety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions.Here's a detailed overview:
ASME SB163 / B165 Monel 400 Chemical Compositon:
| GRADE | C | Mn | Si | S | Cu | Fe | Ni |
| Monel 400 | 0.30Max | 2.00Max | 0.5Max | 0.24Max | 28.0-34.0 | 2.50Max | 63.00Min |
Equivalent Grades for Monel 400 Seamless Tubes:
| 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 |
ASME SB163 / B165 Monel 400 Mechanical Properties:
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Monel 400 | 8.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80,000 , MPa – 550 | Psi – 35,000 , MPa – 240 | 40% |
Monel 400 Key Properties:
1. Corrosion Resistance:
- Resists seawater, acidic (e.g., sulfuric, hydrofluoric), and alkaline environments.
- Performs well in marine, chemical, and oil/gas industries.
2. Mechanical Strength:
- High tensile strength (~550 MPa) and retains ductility at subzero temperatures.
3. Temperature Tolerance:
- Serviceable up to 535°C (1000°F); avoids embrittlement in cryogenic conditions.
4. Fabrication:
- Weldable using techniques like TIG/MIG with argon shielding.
- Machinable but prone to work hardening; requires slow speeds and sharp tools.
Applications:
- Marine Engineering: Pump shafts, propeller shafts, seawater valves.
- Chemical Processing: Heat exchangers, reactors, piping.
- Oil & Gas: Wellhead components, downhole equipment.
- Aerospace/Military: Fasteners, turbine blades.
Advantages vs. Other Alloys:
- Superior to stainless steel in chloride-rich (e.g., seawater) and acidic environments.
- More expensive than steel but offers longevity in harsh conditions.
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ASME SB163 / B165 MONEL 400 Nickel Alloy Seamless Tube, Heat Exchanger /Air Cooler Application Images
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