ASTM B564 Monel R405 Flanges
We manufacture and supply premium-quality Monel R405 Flanges for industries that require superior corrosion resistance, high mechanical strength, and long-term reliability in aggressive environments. Produced according to ASTM B564 Monel R405 Flanges and ASME SB564 Monel R405 Flanges standards, these flanges are extensively used in marine systems, chemical processing units, heat exchangers, and offshore piping applications.
Manufactured from high-performance nickel-copper alloy material, UNS N04405 Flanges are known for their enhanced machinability and excellent resistance to seawater corrosion, alkalis, and acidic media.
What are ASTM B564 Monel R405 Flanges?
ASTM B564 Monel R405 Flanges are specialized fittings used to connect pipes, valves, pumps, and other equipment within a piping system. These flanges are manufactured from Monel R405, a variant of the Monel alloy family, which includes a higher sulfur content to enhance its machinability. Monel R405 is derived from Monel 400 but has better machinability, making it easier to produce components like flanges with precision and accuracy.
Monel R405 maintains excellent resistance to various corrosive environments, including acidic and alkaline media, seawater, and high-temperature conditions. This makes ASTM B564 Monel R405 Flanges ideal for use in industries such as chemical processing, marine engineering, oil and gas, and aerospace.

Quick Overview of Monel Alloy R405 Flanges
| Property | Description |
| Material | Monel R405 Nickel Copper Alloy |
| UNS Designation | UNS N04405 |
| Standards | ASTM B564 / ASME SB564 |
| Available Forms | Weld Neck, Blind, Slip On, Socket Weld, Threaded |
| Pressure Ratings | 150# to 2500# |
| Face Types | RF, FF, RTJ |
| Main Advantages | Corrosion Resistance, Machinability, Strength |
| Industries | Marine, Chemical, Offshore, Oil & Gas |
Why Monel R405 is Preferred for Industrial Flanges
Unlike conventional stainless steel materials, Monel Alloy R405 Flanges perform exceptionally well in corrosive and high-temperature environments. The alloy contains a controlled sulfur content which improves machining characteristics while maintaining excellent corrosion resistance properties.
The material performs efficiently in:
- Saltwater exposure
- Hydrofluoric acid applications
- Chemical processing systems
- Marine piping installations
- Heat exchanger systems
- High-pressure industrial operations
Because of these advantages, Nickel Alloy R405 Flanges are widely selected for critical industrial piping networks where reliability is essential.
Available Types of Monel R405 Flanges
Weld Neck Monel R405 Flanges
These flanges are ideal for high-pressure pipelines due to their tapered hub design and strong welding connection.
Slip On Monel R405 Flanges
Slip-on flanges are easy to align and install, making them suitable for low-pressure systems.
Blind UNS N04405 Flanges
Used to terminate or isolate piping systems and pressure vessel openings.
Socket Weld Alloy R405 Flanges
Socket weld flanges provide strong leak-resistant joints for smaller pipe diameters.
Threaded Monel R405 Flanges
Designed for non-welded piping systems where easy assembly and maintenance are required.
Lap Joint Monel R405 Flanges
These flanges are preferred in systems that require frequent dismantling for inspection and maintenance.


Schedule and Size Chart
| Size (Inches) | Nominal Pipe Size (NPS) | Thickness (Schedule) | Flange Class |
| 1/2 | 1/2 | Schedule 40 | Class 150 |
| 3/4 | 3/4 | Schedule 40 | Class 150 |
| 1 | 1 | Schedule 40 | Class 150 |
| 1 1/4 | 1 1/4 | Schedule 40 | Class 150 |
| 1 1/2 | 1 1/2 | Schedule 40 | Class 150 |
| 2 | 2 | Schedule 40 | Class 150 |
| 2 1/2 | 2 1/2 | Schedule 40 | Class 150 |
| 3 | 3 | Schedule 40 | Class 150 |
| 4 | 4 | Schedule 40 | Class 150 |
| 6 | 6 | Schedule 40 | Class 150 |
Mechanical Properties of ASME SB366 Monel R405 Flanges
| Property | Value |
| Tensile Strength | 70 ksi min |
| Yield Strength | 25 ksi min |
| Elongation | 35% |
| Density | 8.80 g/cm³ |
| Melting Point | 1300 – 1350°C |
Specifications Chart
| Specification | Detail |
| Standard | ASTM B564 |
| Material | Monel R405 |
| Form | Flanges |
| Finish | As forged or as required |
| Pressure Class | Class 150, 300, 600, 900, 1500 |
| Temperature Range | Up to 1000°F (538°C) |
Chemical Composition Chart
| Element | Percentage (%) |
| Nickel (Ni) | 63.0 – 70.0 |
| Copper (Cu) | 28.0 – 34.0 |
| Iron (Fe) | 2.0 max |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.0 max |
| Carbon (C) | 0.3 max |
| Sulfur (S) | 0.024 max |
| Phosphorus (P) | 0.015 max |
Physical Properties Chart
| Property | Value |
| Density | 8.8 g/cm³ (0.32 lb/in³) |
| Melting Point | 1300 – 1350°C (2372 – 2462°F) |
| Thermal Conductivity | 22 W/m·K |
| Thermal Expansion | 13.0 x 10^-6 /K (22 x 10^-6 /°F) |
| Electrical Resistivity | 0.70 x 10^-6 ohm·m |
Features of UNS N04405 Flanges
Excellent Resistance to Seawater
Monel R405 offers outstanding protection against seawater corrosion and marine atmospheric conditions.
Improved Machining Characteristics
The sulfur content in the alloy enhances machinability and production efficiency.
High Structural Strength
These flanges maintain strength under high pressure and elevated temperature conditions.
Long Operational Life
The material provides extended service life with minimal maintenance requirements.
Suitable for Harsh Chemical Environments
The alloy performs well in acidic and alkaline processing applications.
Industrial Applications of Monel R405 Flanges
Our Monel R405 Flanges are widely supplied for:
- Petrochemical Processing
- Marine Engineering
- Desalination Plants
- Oil Refineries
- Heat Exchanger Manufacturing
- Offshore Platforms
- Chemical Industries
- Condenser Systems
- Power Generation Plants
- Industrial Fluid Transportation
Dimensions, Standards & Pressure Ratings
We supply ASTM B366 Monel R405 Flanges in compliance with international dimensional standards including:
- ANSI B16.5
- ASME B16.47
- DIN Standards
- EN Standards
- BS Standards
Available pressure ratings include:
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
Manufacturing & Quality Assurance
As an experienced Monel R405 Flange Manufacturer, we follow strict quality procedures throughout production.
Our inspection and testing processes include:
- PMI Testing
- Ultrasonic Testing
- Hydrostatic Testing
- Dimensional Verification
- Hardness Testing
- Radiography Testing
- Raw Material Traceability
- Third-Party Inspection
Every flange is manufactured for accuracy, reliability, and international compliance.
Packaging, Documentation & Export Supply
To ensure safe transportation, all ASME SB366 Monel R405 Flanges are packed using export-grade materials.
Packaging options include:
- Fumigated Wooden Boxes
- Wooden Pallets
- Plastic Wrapping
- End Protection Caps
- Customized Export Packaging
We export Monel R405 Flanges to customers across:
- UAE
- Saudi Arabia
- Oman
- Qatar
- Kuwait
- USA
- Europe
- Southeast Asia
Exporters and Suppliers of ASTM B564 Monel R405 Flanges
As leading exporters and suppliers of ASTM B564 Monel R405 Flanges, ASC LLP is committed to providing high-quality products to our clients worldwide. Our flanges meet the stringent ASTM B564 standards, ensuring that they offer exceptional performance and reliability. We work with trusted manufacturers and quality control experts to guarantee that every flange we supply meets industry standards.
Traders and Stockists of ASTM B564 Monel R405 Flanges
In addition to being exporters and suppliers, we also serve as reliable traders and stockists of ASTM B564 Monel R405 Flanges. Our extensive inventory ensures that we can meet the diverse needs of our clients, providing them with prompt delivery and competitive pricing. Our knowledgeable team is always ready to assist with any queries and offer guidance on selecting the right flanges for your specific application.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASTM B564 Monel R405 Flanges. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.

