We manufacture and supply Niobium R04261 Fasteners produced from Nb-1Zr alloy for specialized industrial applications requiring corrosion resistance, ductility, material stability and elevated-temperature performance. UNS R04261 is commercially known as Nb-1Zr or Nb-1%Zr, and ASTM B392 identifies it as Type 4 commercial-grade niobium alloy containing approximately 1% zirconium.
Our product range includes UNS R04261 Nb-1Zr Bolts, studs, screws, threaded rods, nuts, washers and Niobium R04261 Socket Head Cap Screws / Allen Bolts. Metric sizes from M2 to M36 can be supplied according to the required fastener configuration, drawing, thread and application.
As a Niobium R04261 Fasteners Manufacturer in Mumbai, we support industrial buyers with material identification, dimensional inspection, traceability and documentation. We also supply Niobium R04261 Fasteners for export to the USA and other international markets.
Niobium R04261 Fasteners Manufacturer in Mumbai, India
Niobium R04261 Fasteners are manufactured from UNS R04261, a commercial-grade niobium alloy containing approximately 1% zirconium. ASTM B392 classifies R04261 as Type 4 commercial-grade niobium-1% zirconium and specifies requirements for wrought bar, rod and wire. Nb-1Zr fasteners are used for specialized applications requiring corrosion resistance, ductility and high-temperature material stability. Available configurations include bolts, studs, screws, threaded rods and socket head cap screws.
What Are UNS R04261 Fasteners?
UNS R04261 Fasteners are fastening components manufactured from commercial-grade niobium-1% zirconium alloy. Zirconium is added to niobium to provide an alloy with useful strength and high-temperature characteristics while maintaining the ductility and fabricability associated with niobium alloys.
ASTM B392-26 recognizes four grades under its scope:
- R04200 – Type 1, reactor-grade unalloyed niobium
- R04210 – Type 2, commercial-grade unalloyed niobium
- R04251 – Type 3, reactor-grade niobium-1% zirconium
- R04261 – Type 4, commercial-grade niobium-1% zirconium
Therefore, R04261 and R04251 should not be treated as interchangeable grades simply because both are Nb-1Zr alloys. Their grade classification and chemistry requirements differ.
Table of Contents
- ➤ Niobium R04261 Fasteners Manufacturer in Mumbai, India
- ➤ What Are UNS R04261 Fasteners?
- ➤ ASTM B392 Grade R04261 Niobium Fasteners
- ➤ Chemical Composition of Nb-1Zr UNS R04261
- ➤ Mechanical Properties of Niobium R04261
- ➤ Types of Niobium R04261 Fasteners
- ➤ Niobium R04261 Fasteners Size Range
- ➤ Niobium R04261 Fasteners Weight Chart
- ➤ Equivalent Grades of Niobium R04261
- ➤ Manufacturing Process of Niobium R04261 Fasteners
- ➤ Applications of UNS R04261 Nb-1Zr Fasteners
- ➤ Niobium R04261 Fasteners Manufacturer and Exporter to USA
ASTM B392 Grade R04261 Niobium Fasteners
ASTM B392 is the relevant material specification for wrought bar, rod and wire, from which specialized fastener components may be manufactured. Finished fasteners can have their own dimensional, threading and configuration requirements specified through drawings or applicable fastener standards.
R04261 Specifications Chart
| Specification | Niobium R04261 |
|---|---|
| Material | Niobium-1% Zirconium |
| UNS | R04261 |
| ASTM | B392 |
| ASTM Type | Type 4 |
| Grade | Commercial Grade |
| Alloy | Nb-1Zr |
| Nominal Zirconium | 1% |
| Zirconium Range | 0.80–1.20% |
| Product Material Forms under B392 | Bar, Rod, Wire |
| Fastener Forms | Bolts, Studs, Screws, Rods, Socket Head Cap Screws |
| Size Range | M2 to M36, subject to configuration |
| Threads | Metric / Customized |
| Finish | As specified |
| Condition | Annealed or agreed temper |
| Inspection | Dimensional / material inspection as required |
| Documentation | MTC and inspection documentation as specified |
Chemical Composition of Nb-1Zr UNS R04261
| Element | R04261 Requirement, wt.% |
|---|---|
| Niobium (Nb) | Balance |
| Zirconium (Zr) | 0.80–1.20 |
| Carbon (C) | 0.010 max. |
| Nitrogen (N) | 0.010 max. |
| Oxygen (O) | 0.025 max. |
| Hydrogen (H) | 0.0015 max. |
| Tantalum (Ta) | 0.50 max. |
| Iron (Fe) | 0.010 max. |
| Silicon (Si) | 0.005 max. |
| Tungsten (W) | 0.050 max. |
| Nickel (Ni) | 0.005 max. |
| Molybdenum (Mo) | 0.050 max. |
| Hafnium (Hf) | 0.020 max. |
| Titanium (Ti) | 0.020 max. |
Mechanical Properties of Niobium R04261
| Mechanical Property | ASTM B392 Type 4 R04261 |
|---|---|
| Tensile Strength, min. | 195 MPa |
| Yield Strength, min. | 125 MPa |
| Elongation, min. | 15% |
| Condition | Fully Annealed, unless otherwise specified |
| Alloy | Nb-1Zr |
| Grade | Commercial Grade |
Types of Niobium R04261 Fasteners
We manufacture and supply different Nb-1Zr UNS R04261 Screws and fasteners according to application requirements.
➤ Niobium R04261 Bolts
Nb-1%Zr Alloy Bolts can be supplied in hex-head and customized configurations. They are suitable for specialized assemblies where niobium alloy compatibility and corrosion resistance are required.
➤ Refractory Nb-1Zr Bolts and Studs
Refractory Nb-1Zr Bolts and Studs are designed for specialized high-temperature and demanding industrial applications. Studs can be supplied in fully threaded or specified-thread configurations.
➤ UNS R04261 Screws
Nb-1Zr UNS R04261 Screws can be manufactured in different head styles, including machine screws, pan-head screws, flat-head screws and other custom configurations.
➤ Niobium R04261 Socket Head Cap Screws
Niobium R04261 Socket Head Cap Screws, also called Allen bolts, have a recessed hexagonal drive and compact cylindrical head. They are useful where installation access is limited.
➤ R04261 Threaded Rods
Fully threaded Niobium R04261 threaded rods can be supplied in specified lengths and thread pitches for specialized fabrication and equipment assemblies.
➤ Niobium R04261 Nuts and Washers
Matching nuts and washers can be supplied where a complete niobium-alloy fastening system is required.
Niobium R04261 Fasteners Size Range
We can supply Metric M2 to M36 UNS R04261 Fasteners, subject to the required product type, manufacturing route and material availability.
| Size Category | Common Sizes |
|---|---|
| Small | M2, M2.5, M3, M4, M5 |
| Medium | M6, M8, M10, M12, M14, M16 |
| Large | M18, M20, M22, M24 |
| Heavy | M27, M30, M33, M36 |
| Customized | As per drawing |
Thread pitch, length, head dimensions and tolerances should be specified when requesting a quotation.
Niobium R04261 Fasteners Weight Chart
| Nominal Diameter | Approx. Weight kg/m |
|---|---|
| 2 mm | 0.027 |
| 3 mm | 0.061 |
| 4 mm | 0.108 |
| 5 mm | 0.168 |
| 6 mm | 0.242 |
| 8 mm | 0.431 |
| 10 mm | 0.673 |
| 12 mm | 0.969 |
| 16 mm | 1.723 |
| 20 mm | 2.692 |
| 24 mm | 3.877 |
| 27 mm | 4.907 |
| 30 mm | 6.058 |
| 33 mm | 7.330 |
| 36 mm | 8.723 |
Equivalent Grades of Niobium R04261
| Designation | Description | Relationship to R04261 |
|---|---|---|
| UNS R04261 | Commercial Nb-1Zr | Primary grade |
| ASTM B392 Type 4 | Commercial Nb-1Zr | Same classification |
| Nb-1Zr | Niobium with approximately 1% Zr | Common alloy designation |
| UNS R04251 | Reactor-grade Nb-1Zr | Similar alloy family, different grade |
| R04210 | Commercial unalloyed niobium | Different alloy; no Zr addition |
| R04200 | Reactor-grade unalloyed niobium | Different alloy and grade |
Manufacturing Process of Niobium R04261 Fasteners
Applications of UNS R04261 Nb-1Zr Fasteners
UNS R04261 Nb-1Zr Bolts and screws are considered for specialized environments where the characteristics of niobium-1Zr are beneficial.
Typical applications include:
- Chemical processing equipment
- Specialized high-temperature equipment
- Vacuum systems
- Laboratory and research equipment
- Advanced engineering assemblies
- Aerospace-related applications
- Specialized energy equipment
- Corrosive process environments
- High-temperature fabrication
- Niobium-alloy component assemblies
Application suitability should be evaluated against actual temperature, chemical exposure, loading, joining conditions and applicable engineering requirements.
Niobium R04261 Fasteners Manufacturer and Exporter to USA
We supply Niobium R04261 Fasteners from Mumbai, India for domestic and international industrial requirements. Our supply capabilities include Nb-1Zr bolts, studs, screws, threaded rods and socket head cap screws in standard and customized configurations.
As a Niobium R04261 Fasteners Exporter to USA, we can support export orders with product identification, material documentation, inspection requirements and export packing according to the purchase order.
Why Choose Our R04261 Fasteners?- UNS R04261 Nb-1Zr material
- ASTM B392 material compliance where specified
- Metric M2 to M36 sizes
- Bolts, studs and screws
- Socket head cap screws / Allen bolts
- Threaded rods and customized fasteners
- Drawing-based manufacturing
- Material traceability
- Dimensional inspection
- MTC and inspection documentation
- Mumbai-based supply
- Export support for USA and international buyers
Request a Quote for Niobium R04261 Fasteners
For a quotation, provide the UNS grade, ASTM specification, fastener type, diameter, length, thread pitch, quantity, material condition and required documentation. For specialized applications, also provide operating temperature and service-environment information.
We supply Niobium R04261 Fasteners, UNS R04261 Fasteners, Nb-1Zr Fasteners, ASTM B392 Grade R04261 Niobium Fasteners, Nb-1%Zr Alloy Bolts and UNS R04261 Nb-1Zr Bolts for industrial and export requirements.
