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%)

Mechanical Properties (Solution Annealed + Water Quenched)

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.