N04400 WNRF Flanges ASTM B564 Compliant High-Performance Corrosion Resistant Flanges

Monel 400 WNRF Flanges (ASTM B564 N04400) - High-Performance Corrosion Resistant Flanges

1. Introduction to Monel 400 WNRF Flanges

Monel 400 (UNS N04400) weld neck raised face (WNRF) flanges, manufactured under ASTM B564 standard, deliver

exceptional resistance to corrosive environments. As a nickel-copper alloy, Monel 400 maintains superior mechanical

properties from cryogenic temperatures up to 1000°F (540°C), making it ideal for critical applications in marine, chemical,

and oil & gas industries. These flanges ensure leak-proof performance under high-pressure conditions.

2. Monel 400 Chemical Composition (ASTM B564)

3. Equivalent Grades & Specifications

Monel 400 is globally recognized under multiple standards:

4. Monel 400 Mechanical Properties (WNRF Flange)

Flanges meet ASTM B564 minimum requirements for forged products:

5. Key Advantages of Monel 400 WNRF Flanges

• Corrosion Resistance: Excellent against seawater, hydrofluoric acid, alkalis, and sulfuric acid.

• Thermal Stability: Maintains strength from -200°F to 1000°F (-129°C to 540°C).

• Stress-Corrosion Cracking (SCC) Resistance: Superior to stainless steels in chloride-rich environments.

• Fabrication Ease: Weldable via TIG/MIG methods (use ENiCu-7 filler).

• Non-Magnetic: Essential for subsea and electronic applications.

6. Monel 400 Flange Applications

WNRF flanges in Monel 400 are specified for:

• Marine Engineering: Seawater piping, pump shafts, propeller shafts.

• Chemical Processing: Reactors, HF alkylation units, acid storage tanks.

• Oil & Gas: Offshore platform components, umbilicals, subsea valves.

• Power Generation: Feedwater heaters in nuclear/thermal plants.

• Desalination Plants: Brine heaters, evaporator tubes.