Overview
Monel Alloy 400 and K500 Flanges are widely used for joining pipes, valves, pumps, and equipment in corrosive and high-strength applications. These nickel-copper alloy flanges provide excellent resistance to seawater, acids, alkalis, and high-temperature environments, making them ideal for demanding industrial services.
Types of Monel Alloy Flanges
Technical Specifications
| Standard | Size Range | Pressure Rating | Face Type |
|---|---|---|---|
| ASME / ANSI B16.5 & B16.47 | ½” to 48” | 150# to 2500# | RF, RTJ |
| DIN | DN10 to DN2000 | PN6 to PN400 | RF, FF |
| JIS | 10A to 1500A | 5K to 30K | FF, RF |
Material Grades: ASTM B564 UNS N04400 (Monel 400) / ASTM B564 UNS N05500 (Monel K500)
Chemical & Mechanical Properties
- Tensile Strength: 550–960 MPa
- Yield Strength: 240–690 MPa
- Hardness: 120–180 HB
- Nickel Content: ~63% minimum
Applications & Industries
Key Features & Benefits
- Excellent resistance to seawater and corrosion
- High strength and toughness at elevated temperatures
- Outstanding resistance to acids and alkalis
- Complies with international flange standards
- Custom sizes, pressure classes, and finishes available
Certifications & Quality Assurance
- ISO Certified Manufacturing
- PED & IBR Approved
- Third-Party Inspection (TPI) Available
- Mill Test Certificates (MTC) as per EN 10204
Frequently Asked Questions
What is the difference between Monel 400 and Monel K500?
Monel 400 (UNS N04400) offers excellent corrosion resistance in marine and chemical environments, with good mechanical properties. Monel K500 (UNS N05500) provides similar corrosion resistance but delivers significantly higher strength and hardness due to precipitation hardening (age-hardening) — making it ideal for high-stress applications such as pump shafts, springs, and fasteners.
Are Monel flanges suitable for seawater applications?
Yes, both Monel 400 and K500 flanges perform exceptionally well in seawater and marine environments. They offer excellent resistance to corrosion, erosion, and biofouling, making them a preferred choice for offshore platforms, shipbuilding, desalination plants, and underwater piping systems.
Which pressure classes are available for Monel flanges?
Monel alloy flanges are available in ASME/ANSI pressure classes from 150 to 2500, with dimensions as per ASME B16.5 and ASME B16.47. Equivalent DIN and JIS ratings are also available upon request. We offer all standard flange types — including Weld Neck, Slip-On, Socket Weld, Blind, Threaded, and Lap Joint — in sizes ranging from ½” NB to 48″ NB.
What manufacturing standards do you follow for Monel flanges?
Our Monel flanges are manufactured in compliance with ASTM B564 / ASME SB564 for material specifications and ASME B16.5 / B16.47 for dimensional standards. We also offer options meeting NACE MR0175, PED 2014/68/EU, and EN 10204 (Type 3.1/3.2) certification upon request.
Do you provide material test certificates with Monel flanges?
Yes, we provide full material traceability with EN 10204 Type 3.1 (manufacturer’s test certificate) and Type 3.2 (third-party inspection) documentation. Additional testing — including PMI, hydrostatic, ultrasonic, and NDT — can be arranged as per customer requirements.
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Looking for high-quality Monel Alloy 400 / K500 Flanges? Fully compliant with ASTM B564, ASME SB564, and ASME B16.5. Contact us today.
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