Monel 400 Forged Flange with Excellent Seawater Corrosion Resistance for Marine and Chemical Applications
Monel 400 Forged Flange Conforming to ASME B16.5 / ASME B16.47 Standards
Monel 400 forged flange is a high-performance nickel-copper alloy flange component with excellent corrosion resistance, particularly in seawater and chloride environments. It provides stable mechanical properties and reliable sealing performance under demanding service conditions.
Key Features
- Excellent seawater corrosion resistance.
- Good resistance to chloride stress corrosion cracking (SCC) .
- Resistance to alkaline and salt solutions.
- Excellent cryogenic toughness.
- Non-magnetic structure.
- Dense forged microstructure with high pressure capability.
- Suitable for high-pressure sealing systems.
Common Types
Weld Neck Flanges (WN), Slip-On Flanges (SO), Blind Flanges (BL), Socket Weld Flanges (SW), and Threaded Flanges.
Typical Applications
- Fluorine chemical industry and hydrofluoric acid equipment piping.
- Seawater desalination and offshore platform seawater transmission systems.
- Caustic soda and alkaline chemical processing plants.
- Oil & gas desulfurization and chloride-containing corrosive pipelines.
- Low-temperature equipment and various corrosive process piping systems.
Chemical Composition (wt%)
| Element | Ni + Co | Cu | Fe | Mn | C | Si | S |
|---|---|---|---|---|---|---|---|
| Range | ≥ 63.0 | 28.0 – 34.0 | ≤ 2.5 | ≤ 2.0 | ≤ 0.3 | ≤ 0.5 | ≤ 0.024 |
Mechanical Properties (Solution Annealed + Water Quenched)
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 483 MPa (70 ksi) |
| Yield Strength (Rp0.2) | ≥ 172 MPa (25 ksi) |
| Elongation (A5) | ≥ 35% |
| Density | 8.80 g/cm³ |
| Hardness | ≤ 150 HB |
| Max Service Temperature | 425°C(797°F) |
Quality Assurance
All Monel 400 forged flanges undergo rigorous inspection including ultrasonic testing (UT per ASTM A388), mechanical property verification per ASTM E8/E21, chemical analysis via OES, and dimensional inspection. Full traceability from melt source to final shipment, complete MTR documents are available upon request.
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