Niobium Fasteners are specialized fastening components manufactured from commercially pure niobium and niobium alloys. They include Pure Niobium Bolts, screws, nuts, studs, washers and threaded rods. ASTM B392 identifies R04200 Type 1 and R04210 Type 2 as unalloyed niobium grades, while R04251 Type 3 and R04261 Type 4 are niobium alloys containing approximately 1% zirconium. Niobium fasteners are selected for their corrosion resistance, refractory-metal characteristics and suitability for specialized chemical, aerospace, electronic and high-temperature applications.
Niobium Fasteners Manufacturer in India | Niobium Bolts & Studs
Niobium Fasteners are specialized components designed for applications where corrosion resistance, material purity and refractory-metal characteristics are important. Niobium, represented by the chemical symbol Nb, is a refractory metal with a density of approximately 8.57 g/cm³ and a melting point of about 2477°C.
We supply Niobium Alloy Fasteners in different configurations, sizes and material grades. Our range includes Pure Niobium Bolts, Niobium Screws, Refractory Niobium Bolts and Studs, nuts, washers and Niobium Threaded Rods.
For material selection, ASTM B392-26 covers four wrought niobium and niobium alloy grades: R04200 Type 1, R04210 Type 2, R04251 Type 3 and R04261 Type 4. The standard specifies requirements relating to chemistry and mechanical properties.
Table of Contents
- ➤ Niobium Fasteners Manufacturer in India
- ➤ Niobium Fasteners Specifications
- ➤ Types of Niobium Fasteners
- ➤ Niobium Chemical Composition
- ➤ Niobium Mechanical Properties
- ➤ Niobium Fasteners Weight Chart
- ➤ Niobium Equivalent Grades Chart
- ➤ Properties and Advantages of Niobium Fasteners
- ➤ Applications of Niobium Fasteners
- ➤ Niobium Fasteners Stockist and Supplier in India
- ➤ Niobium Threaded Rod Stockist
- ➤ Niobium Fasteners Exporter to Europe
Niobium Fasteners Specifications
| Specification | Details |
|---|---|
| Product | Niobium Fasteners |
| Material | Pure Niobium / Niobium-Zirconium Alloy |
| Main Grades | R04200, R04210, R04251, R04261 |
| Alloy | Nb / Nb-1%Zr |
| Standard | ASTM B392 where applicable |
| Fastener Types | Bolts, Screws, Studs, Nuts, Washers, Threaded Rods |
| Thread | Metric, UNC, UNF, BSW and Customized |
| Manufacturing | Machined / Cold Worked / Customized |
| Surface | Mill, Machined, Polished or Anodized where specified |
| Size | As per standard or customer drawing |
| Supply | Standard and Custom-Made |
| Application | Chemical, Aerospace, Electronics and Specialized Engineering |
Types of Niobium Fasteners
➤ Pure Niobium Bolts
Pure niobium bolts are manufactured from unalloyed niobium grades such as R04200 and R04210. They can be supplied in hex-head, socket-head and other customized configurations depending on the joint design.
➤ Niobium Screws
Niobium screws are available in machine screw, socket screw and custom configurations. Anodized Biocompatible Niobium Screws can be produced for specialized applications where a controlled niobium oxide surface is required.
➤ Refractory Niobium Bolts and Studs
Niobium is classified as a refractory metal because of its high melting point and thermal stability. Refractory niobium bolts and studs are used in specialized assemblies where conventional fastener materials may not provide the desired material characteristics.
➤ Niobium Threaded Rods
Niobium threaded rods are supplied in full-thread or specified-length configurations. We can supply threaded rods according to required diameter, length and thread profile.
➤ Niobium Nuts and Washers
Compatible niobium nuts and washers can be supplied with bolts, studs and threaded rods to form complete fastening assemblies.
➤ Niobium Alloy Fasteners
Niobium-zirconium grades such as R04251 and R04261 contain approximately 0.8–1.2% zirconium according to published ASTM B392 composition tables.
Niobium Chemical Composition
| Element | R04200 Type 1 | R04210 Type 2 | R04251 Type 3 | R04261 Type 4 |
|---|---|---|---|---|
| Carbon (C) | 0.010 max | 0.010 max | 0.010 max | 0.010 max |
| Nitrogen (N) | 0.010 max | 0.010 max | 0.010 max | 0.010 max |
| Oxygen (O) | 0.015 max | 0.025 max | 0.015 max | 0.025 max |
| Hydrogen (H) | 0.0015 max | 0.0015 max | 0.0015 max | 0.0015 max |
| Zirconium (Zr) | 0.020 max | 0.020 max | 0.8–1.2 | 0.8–1.2 |
| Tantalum (Ta) | 0.10 max | 0.30 max | 0.10 max | 0.50 max |
| Iron (Fe) | 0.005 max | 0.010 max | 0.005 max | 0.010 max |
| Silicon (Si) | 0.005 max | 0.005 max | 0.005 max | 0.005 max |
| Tungsten (W) | 0.030 max | 0.050 max | 0.030 max | 0.050 max |
| Nickel (Ni) | 0.005 max | 0.005 max | 0.005 max | 0.005 max |
| Molybdenum (Mo) | 0.010 max | 0.020 max | 0.010 max | 0.050 max |
| Hafnium (Hf) | 0.020 max | 0.020 max | 0.020 max | 0.020 max |
| Titanium (Ti) | 0.020 max | 0.030 max | 0.020 max | 0.030 max |
| Niobium (Nb) | Balance | Balance | Balance | Balance |
Niobium Mechanical Properties
| Grade / Type | Condition | Tensile Strength Min. | Yield Strength Min. | Elongation Min. |
|---|---|---|---|---|
| R04200 Type 1 | Annealed | 125 MPa | 73 MPa | 20–25% |
| R04210 Type 2 | Annealed | 125 MPa | 59–73 MPa | 20–25% |
| R04251 Type 3 | Annealed | 195 MPa | 125 MPa | 15–20% |
| R04261 Type 4 | Annealed | 195 MPa | 125 MPa | 15–20% |
Niobium Fasteners Weight Chart
| Nominal Diameter | Approx. Weight kg/m |
|---|---|
| 6 mm | 0.242 kg/m |
| 8 mm | 0.431 kg/m |
| 10 mm | 0.673 kg/m |
| 12 mm | 0.969 kg/m |
| 16 mm | 1.724 kg/m |
| 20 mm | 2.693 kg/m |
| 24 mm | 3.878 kg/m |
| 30 mm | 6.058 kg/m |
| 36 mm | 8.724 kg/m |
| 40 mm | 10.77 kg/m |
Niobium Equivalent Grades Chart
| Material / Grade | ASTM Designation | Description |
|---|---|---|
| Niobium Type 1 | R04200 | Reactor Grade Unalloyed Niobium |
| Niobium Type 2 | R04210 | Commercial Grade Unalloyed Niobium |
| Niobium Type 3 | R04251 | Reactor Grade Niobium-1% Zirconium |
| Niobium Type 4 | R04261 | Commercial Grade Niobium-1% Zirconium |
| Pure Niobium | Nb | Commercially Pure / Unalloyed Niobium |
| Nb-1Zr | Nb-Zr | Niobium Alloy Containing Approximately 1% Zirconium |
Properties and Advantages of Niobium Fasteners
Niobium is selected for specialized fastening applications because it combines several useful material characteristics.
- High-temperature capability: Niobium has a high melting point of approximately 2477°C, characteristic of refractory metals.
- Corrosion resistance: Niobium forms a stable oxide layer and offers strong resistance in many corrosive environments.
- Refractory-metal characteristics: Its high melting point and thermal stability make niobium useful in specialized high-temperature engineering.
- Material purity options: Different grades provide options for unalloyed niobium and niobium-zirconium alloys.
- Surface anodizing: Niobium surfaces can be anodized for specialized surface and appearance requirements.
- Custom manufacturing: Bolts, screws, studs and threaded rods can be produced according to dimensions, thread specifications and engineering drawings.
Applications of Niobium Fasteners
Niobium Fasteners Stockist and Supplier in India
We supply Niobium Fasteners for specialized industrial and engineering requirements. As a Niobium Alloy Bolts Supplier in India, we can support requirements for pure niobium and niobium-zirconium fasteners in different configurations.
Our supply range includes Pure Niobium Bolts, Niobium Screws, Niobium Studs, Nuts, Washers and Niobium Threaded Rods.
For customized requirements, customers can provide the material grade, diameter, length, thread specification, quantity, drawing and service conditions. This allows the required fastener to be matched with the appropriate material and manufacturing route.
Niobium Threaded Rod Stockist
We supply Niobium Threaded Rods in specified diameters and lengths for specialized fastening applications. Full-thread rods can be manufactured or supplied according to the required thread standard.
Metric and inch thread requirements can be considered, subject to manufacturability and material availability. Custom-cut lengths can also be supplied for project requirements.
Niobium Fasteners Exporter to Europe
We also support international requirements as a Niobium Fasteners Exporter to Europe, supplying specialized niobium bolts, screws, studs and threaded rods.
Export enquiries can be handled according to specified material grades, dimensions, inspection requirements, documentation, packaging and delivery location. Customers can share their purchase specification or engineering drawing for a more accurate quotation.
Order Niobium Fasteners from Us
We supply Niobium Fasteners and Niobium Alloy Fasteners for specialized industrial applications, including Pure Niobium Bolts, Refractory Niobium Bolts and Studs, Niobium Screws and Niobium Threaded Rods.
Share your grade, fastener type, diameter, length, thread, quantity and delivery location with us to receive a product and quotation proposal based on your requirements.
