ASTM B392 Niobium R04200 Flanges
Amardeep Steel Centre LLP is a recognized leader in the supply and distribution of high-quality metal products, specializing in unique and high-performance alloys. Among our diverse range of products, we are proud to offer ASTM B392 Niobium R04200 Flanges, designed to meet the specific requirements of industries demanding superior performance and reliability.
What is ASTM B392 RO4200 Niobium Flanges?
ASTM B392 RO4200 Niobium Flanges are high-grade industrial components crafted from niobium, a rare and highly corrosion-resistant metal. Niobium is known for its remarkable properties, including its ability to withstand extreme temperatures and its resistance to various corrosive environments. The ASTM B392 standard outlines the specifications for niobium and niobium alloy flanges, ensuring that they meet stringent quality and performance criteria.
These flanges are manufactured from the R04200 grade of niobium, a pure form of the metal, which is highly sought after for its mechanical properties and resistance to chemical attack. Niobium ASTM B392 RO4200 Flanges are commonly used in industries where high-purity and performance are crucial, such as chemical processing, aerospace, and nuclear sectors.

Properties of ASTM B392 RO4200 Niobium Flanges
The unique properties of ASTM B392 RO4200 Niobium Flanges make them indispensable in many specialized applications:
- Corrosion Resistance: Niobium flanges are exceptionally resistant to corrosion, particularly in acidic environments. This makes them ideal for applications where exposure to aggressive chemicals is common.
- High Melting Point: Niobium has a melting point of 2,468°C (4,474°F), allowing these flanges to perform efficiently in high-temperature environments without losing their structural integrity.
- Low Density: Niobium is relatively light compared to other metals with similar high-performance characteristics. This low density makes it easier to handle and reduces the overall weight of the equipment in which it is used.
- Good Ductility: The metal’s ductility allows for easy fabrication into various shapes and sizes, providing flexibility in design and application.
- Biocompatibility: Niobium is biocompatible, making it suitable for use in medical and dental applications, particularly in implants and prosthetics.
- Superconductivity: In addition to its corrosion resistance, niobium is also known for its superconducting properties at very low temperatures, which is critical in advanced scientific applications such as MRI machines and particle accelerators.
Advantages of Using ASTM B392 RO4200 Niobium Flanges
Choosing ASTM B392 RO4200 Niobium Flanges for your application comes with numerous advantages:
- Long Service Life: The exceptional corrosion resistance of niobium means that these flanges have a long service life, reducing the need for frequent replacements and maintenance.
- High Performance in Extreme Conditions: These flanges are designed to perform under extreme conditions, including high temperatures and corrosive environments, ensuring reliability and safety in critical applications.
- Versatility: Niobium flanges are suitable for a wide range of applications, from chemical processing to aerospace, due to their unique combination of properties.
- Cost-Effective in the Long Term: Although the initial cost of niobium flanges may be higher than other materials, their durability and low maintenance requirements make them a cost-effective choice over the life of the equipment.
- Environmentally Friendly: Niobium is a stable, non-toxic metal that does not release harmful byproducts, making it an environmentally friendly option for industries focused on sustainability.


Schedule and Size Chart
Nominal Pipe Size (NPS) | Flange Diameter (inches) | Flange Thickness (inches) | Bolt Circle Diameter (inches) | Number of Bolts | Bolt Hole Diameter (inches) |
1/2″ | 3.50 | 0.62 | 2.38 | 4 | 0.62 |
1″ | 4.25 | 0.75 | 3.12 | 4 | 0.75 |
2″ | 6.00 | 0.88 | 4.75 | 4 | 0.75 |
3″ | 7.50 | 0.88 | 6.00 | 4 | 0.75 |
4″ | 9.00 | 0.88 | 7.50 | 8 | 0.75 |
6″ | 11.00 | 0.88 | 9.50 | 8 | 0.88 |
8″ | 13.50 | 0.88 | 11.75 | 8 | 0.88 |
10″ | 16.00 | 1.00 | 14.25 | 12 | 1.00 |
12″ | 19.00 | 1.12 | 17.00 | 12 | 1.12 |
Mechanical Properties Chart
Property | Value | Unit |
Tensile Strength | 275 | MPa (40,000 psi) |
Yield Strength | 145 | MPa (21,000 psi) |
Elongation | 20 | % |
Hardness | 45 | HB (Brinell) |
Modulus of Elasticity | 105 | GPa (15,200 ksi) |
Specifications Chart
Standard | Specification |
ASTM | B392 |
Material | RO4200 Niobium |
Class | Flanges |
Dimensions | ASME B16.5/B16.47 |
Type | Weld Neck, Slip-On, Blind, Socket Weld, Threaded, Lap Joint, Orifice |
Chemical Composition Chart
Element | Content (%) |
Niobium (Nb) | ≥ 99.0 |
Tantalum (Ta) | ≤ 0.10 |
Titanium (Ti) | ≤ 0.02 |
Iron (Fe) | ≤ 0.02 |
Tungsten (W) | ≤ 0.05 |
Molybdenum (Mo) | ≤ 0.05 |
Nickel (Ni) | ≤ 0.05 |
Silicon (Si) | ≤ 0.01 |
Carbon (C) | ≤ 0.01 |
Nitrogen (N) | ≤ 0.01 |
Hydrogen (H) | ≤ 0.01 |
Oxygen (O) | ≤ 0.05 |
Physical Properties Chart
Property | Value | Unit |
Density | 8.57 | g/cm³ |
Melting Point | 2468 | °C (4474°F) |
Thermal Conductivity | 53 | W/m·K |
Electrical Resistivity | 152 | nΩ·m |
Coefficient of Thermal Expansion | 7.3 | µm/m·K |
Application Chart
Industry | Application |
Chemical Processing | Corrosion-resistant components in reactors and piping |
Aerospace | High-temperature engine and structural components |
Nuclear | Reactor components, heat exchangers, and radiation shields |
Medical Devices | Biocompatible implants and surgical instruments |
Electronics | Superconducting magnets and sensitive electronic components |
Oil & Gas | Corrosion-resistant flanges in subsea and offshore applications |
ASTM B392 RO4200 Niobium Flanges: Manufacturing Process
Manufacturing ASTM B392 RO4200 Niobium Flanges requires precision and expertise to ensure that the final product meets the required standards:
- Material Selection: The process begins with the careful selection of high-purity niobium (R04200 grade) to ensure the final product’s performance and durability.
- Forging: The niobium is forged into the desired shape under high pressure and temperature conditions, ensuring that the flange has the necessary strength and durability.
- Machining: Precision machining is then employed to achieve the exact dimensions and tolerances required by the ASTM B392 standard. This step is crucial for ensuring that the flange will fit perfectly with other components.
- Heat Treatment: Depending on the application, the niobium flanges may undergo heat treatment to enhance specific properties such as hardness or corrosion resistance.
- Inspection and Testing: Each flange undergoes rigorous inspection and testing to ensure that it meets the ASTM B392 specifications. This includes visual inspections, dimensional checks, and testing for mechanical properties.
- Surface Finishing: Finally, the flanges may undergo surface finishing processes such as polishing or coating, depending on the requirements of the application.
ASTM B392 RO4200 Niobium Flanges are a critical component in many high-performance applications, offering exceptional corrosion resistance, high-temperature stability, and durability. Whether you are in the chemical processing, aerospace, or nuclear industry, these flanges provide the reliability and performance you need.
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 ASTM B392 Niobium R04200 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.