Monel Flanges: Durable Solutions for High-Performance Applications
Monel flanges are integral components in industries requiring reliable and durable connections for pipelines, valves, and other critical equipment. Known for their excellent resistance to corrosion and high strength, Monel steel flanges are the preferred choice for applications in harsh environments. As a leading Monel Flanges manufacturer and exporter in India, Amardeep Steel Centre LLP offers a wide range of Monel flanges that meet the diverse needs of global industries.
What Are Monel Flanges?
Monel flanges are connectors used to join two sections of piping or to connect pipes to other equipment, such as valves or pumps. These flanges are manufactured from Monel, a group of nickel-copper alloys that boast outstanding corrosion resistance, particularly in marine and chemical environments. The most common Monel alloys used for flanges include Monel 400 and Monel K500.
Monel 400 is renowned for its excellent mechanical properties at sub-zero temperatures, high strength, and resistance to a wide range of corrosive environments. On the other hand, Monel K500 offers similar corrosion resistance to Monel 400 but with increased strength and hardness due to its added aluminum and titanium content.

Properties of Monel Flanges
The unique properties of Monel flanges make them ideal for various industrial applications. Some of the key properties include:
- Corrosion Resistance: Monel flanges exhibit exceptional resistance to corrosion in various environments, including seawater, hydrofluoric acid, sulfuric acid, and alkaline solutions. This makes them ideal for use in marine, chemical processing, and oil and gas industries.
- High Strength: Monel alloys offer high tensile strength and durability, even at elevated temperatures. This ensures that Monel flanges can withstand high pressure and stress without deformation or failure.
- Thermal Stability: Monel flanges maintain their mechanical properties over a wide range of temperatures, making them suitable for both high-temperature and cryogenic applications.
- Good Weldability: Monel alloys can be easily welded, allowing for the fabrication of complex flange designs without compromising the integrity of the material.
- Non-Magnetic: Monel flanges are non-magnetic, making them suitable for applications where magnetic interference needs to be minimized.
Advantages of Monel Flanges
Monel flanges offer several advantages over other types of flanges, particularly in challenging environments. Some of these advantages include:
- Long Service Life: Due to their excellent corrosion resistance and high strength, Monel flanges have a long service life, reducing the need for frequent replacements and minimizing downtime in critical applications.
- Versatility: Monel flanges are versatile and can be used in various industries, including marine, chemical, oil and gas, aerospace, and power generation. Their ability to perform well in both high and low temperatures further enhances their versatility.
- Reliability: The robustness of Monel flanges ensures reliable performance in demanding applications, providing a secure connection that can withstand extreme conditions.
- Cost-Effectiveness: While Monel flanges may have a higher initial cost compared to other materials, their durability and long service life result in lower maintenance and replacement costs over time, making them a cost-effective solution for many industries.
- Environmental Resistance: Monel flanges are resistant to various environmental factors, including exposure to seawater, acids, and alkaline solutions. This resistance ensures that they remain unaffected by harsh conditions, providing a reliable connection in even the most challenging environments.


Schedule and Size Chart
Nominal Pipe Size (NPS) | Flange Outer Diameter (OD) in inches | Flange Thickness (T) in inches | Bolt Circle Diameter (BCD) in inches | Number of Bolts | Bolt Size |
1/2″ | 3.50 | 0.69 | 2.38 | 4 | 1/2″ x 2.5″ |
3/4″ | 3.88 | 0.81 | 2.75 | 4 | 1/2″ x 2.75″ |
1″ | 4.25 | 0.94 | 3.13 | 4 | 1/2″ x 2.75″ |
1-1/2″ | 5.00 | 1.00 | 3.88 | 4 | 1/2″ x 2.75″ |
2″ | 6.00 | 1.00 | 4.75 | 4 | 5/8″ x 3.25″ |
3″ | 7.50 | 1.13 | 6.00 | 4 | 5/8″ x 3.50″ |
4″ | 9.00 | 1.19 | 7.50 | 8 | 5/8″ x 3.50″ |
6″ | 11.00 | 1.31 | 9.50 | 8 | 3/4″ x 3.75″ |
8″ | 13.50 | 1.44 | 11.75 | 8 | 3/4″ x 3.75″ |
10″ | 16.00 | 1.56 | 14.25 | 12 | 7/8″ x 4.00″ |
12″ | 19.00 | 1.69 | 17.00 | 12 | 7/8″ x 4.25″ |
Mechanical Properties Chart
Property | Monel 400 | Monel K500 |
Tensile Strength (MPa) | 550-620 | 965 |
Yield Strength (MPa) | 240-345 | 690 |
Elongation (% in 50mm) | 30-40 | 20-30 |
Hardness (Rockwell B) | 70-85 | 80-95 |
Impact Strength (J) | High | High |
Fatigue Strength (MPa) | 180 | 300 |
Specifications Chart
Specification | Monel 400 | Monel K500 |
ASTM Standard | ASTM B564, ASTM B366 | ASTM B865, ASTM F467 |
ASME Standard | ASME SB564, ASME SB366 | ASME SB865, ASME F467 |
DIN Standard | DIN 2.4360, 2.4361 | DIN 2.4375, 2.4376 |
UNS Number | N04400 | N05500 |
Flange Types | Weld Neck, Slip-On, Blind | Weld Neck, Slip-On, Blind |
Chemical Composition Chart
Element | Monel 400 (%) | Monel K500 (%) |
Nickel (Ni) | 63.0 – 70.0 | 63.0 – 70.0 |
Copper (Cu) | 28.0 – 34.0 | 27.0 – 33.0 |
Iron (Fe) | 2.0 max | 2.0 max |
Manganese (Mn) | 2.0 max | 1.5 max |
Carbon (C) | 0.3 max | 0.25 max |
Silicon (Si) | 0.5 max | 0.5 max |
Sulfur (S) | 0.024 max | 0.01 max |
Aluminum (Al) | – | 2.30 – 3.15 |
Titanium (Ti) | – | 0.35 – 0.85 |
Physical Properties Chart
Property | Monel 400 | Monel K500 |
Density (g/cm³) | 8.80 | 8.44 |
Melting Range (°C) | 1300-1350 | 1350-1400 |
Thermal Conductivity (W/m·K) | 21.8 | 17.1 |
Specific Heat Capacity (J/g·K) | 0.427 | 0.383 |
Electrical Resistivity (μΩ·m) | 0.513 | 0.609 |
Magnetic Permeability | <1.005 | <1.005 |
Application Chart
Industry | Application | Monel 400 | Monel K500 |
Marine | Valve components, pump shafts, fasteners | High corrosion areas | High corrosion + high strength |
Chemical | Heat exchangers, reactor vessels, piping | Acidic & alkaline environments | Strong acidic environments |
Oil & Gas | Sour gas service, offshore equipment | Corrosion-resistant components | High strength components |
Aerospace | Landing gear, structural components | High strength, lightweight | High strength, lightweight |
Power Generation | Nuclear reactors, heat exchangers | High corrosion areas | High temperature + high corrosion |
Why Choose Amardeep Steel Centre LLP for Monel Flanges?
As a trusted Monel Flanges supplier and exporter, Amardeep Steel Centre LLP is committed to providing high-quality Monel flanges that meet the stringent requirements of various industries. Our expertise in manufacturing and exporting Monel alloy flange ensures that we can offer products that meet international standards and are tailored to the specific needs of our clients.
- Quality Assurance: We adhere to strict quality control measures throughout the manufacturing process to ensure that our Monel alloy flanges meet the highest standards of quality and reliability.
- Customization: We offer customized solutions to meet the unique requirements of our clients. Whether you need Monel flange with specific dimensions, pressure ratings, or material grades, we can deliver products that match your exact specifications.
- Global Export: As one of the leading Monel Flanges manufacturers and exporters in India, we have established a strong presence in international markets. Our extensive network of distributors and partners ensures that our products reach customers worldwide in a timely and efficient manner.
- Technical Support: Our team of experienced engineers and technical experts is available to provide guidance and support throughout the selection and installation process. We work closely with our clients to ensure that they choose the right Monel Alloy Flange for their specific applications.
- Competitive Pricing: We offer competitive pricing on our Monel flanges without compromising on quality. Our commitment to providing value for money ensures that our clients receive the best possible products at affordable prices.
Monel flange is a reliable and durable solution for industries requiring high-performance connections in corrosive and high-temperature environments. Their unique properties and advantages make them the preferred choice for a wide range of applications, from marine and chemical processing to aerospace and power generation.
Global Reach
Amardeep Steel Centre 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 monel alloy 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.