Niobium C-103 Fasteners are manufactured from C-103 niobium alloy, UNS R04295, also known as Nb-10Hf-1Ti. The alloy contains approximately 10% hafnium and 1% titanium with niobium as the balance. C-103 is a refractory alloy known for maintaining useful strength at elevated temperatures and is used in demanding aerospace, propulsion and spacecraft applications. ASTM B655/B655M covers UNS R04295 niobium-hafnium alloy bar, rod and wire, while ASTM B652/B652M covers the corresponding ingot material.
What Are Niobium C103 Fasteners?
Niobium C103 Fasteners are specialized fastening components produced from C-103 niobium-hafnium-titanium alloy. The material is designated UNS R04295 and is commonly described as Nb-10Hf-1Ti.
C-103 belongs to the refractory-metal family and is selected for applications requiring a combination of elevated-temperature capability, relatively low ductile-to-brittle transition behavior and resistance to demanding thermal environments.
We supply C103 Niobium Alloy Fasteners in different configurations, including bolts, screws, studs, nuts and custom-machined fastening components.
The alloy's composition is particularly important to its performance. ASTM specifies R04295 as a niobium-base alloy containing approximately 10% hafnium and 1% titanium.
Table of Contents
- ➤ What Are Niobium C103 Fasteners?
- ➤ Niobium C-103 Fasteners Specifications
- ➤ Types of C-103 Niobium Alloy Fasteners
- ➤ Chemical Composition of UNS R04295 C103
- ➤ Mechanical Properties of Niobium C103 Fasteners
- ➤ Physical Properties of C103 Niobium Alloy
- ➤ Manufacturing of Niobium C-103 Fasteners
- ➤ Niobium C-103 Fasteners Weight Chart
- ➤ Equivalent Grades of Niobium C-103
- ➤ Applications of C-103 Niobium Bolts and Screws
- ➤ Niobium C-103 Fasteners Manufacturer and Exporter
- ➤ Why Choose Us for Niobium C-103 Fasteners?
Niobium C-103 Fasteners Specifications
| Specification | Details |
|---|---|
| Product | Niobium C-103 Fasteners |
| Alloy | C-103 |
| UNS | R04295 |
| Alloy composition | Nb-10Hf-1Ti |
| Base metal | Niobium |
| Material family | Niobium-Hafnium-Titanium Alloy |
| ASTM material specification | ASTM B655/B655M |
| ASTM ingot specification | ASTM B652/B652M |
| Product forms under ASTM B655 | Bar, rod and wire |
| Density | Approx. 8.85 g/cm³ |
| Melting point | Approx. 2350°C |
| Service capability | Application dependent; C-103 is used at very high temperatures |
| Fastener form | Bolts, screws, studs, nuts, washers, custom parts |
| Threads | Metric / UNC / UNF / as specified |
| Dimensions | As per drawing or customer requirement |
| Finish | As specified |
| Testing | As agreed with purchase specification |
| Certification | MTC / CoC / inspection reports as required |
ASTM B655/B655M specifically covers R04295 bar, rod and wire, while ASTM B652/B652M covers R04295 ingot material. Therefore, when ordering finished fasteners, the fastener dimensional, thread and inspection requirements should be specified separately.
Types of C-103 Niobium Alloy Fasteners
We supply or manufacture C-103 Niobium Bolts and Screws in configurations suitable for specialized engineering assemblies.
➤ C-103 Niobium Bolts
C-103 bolts can be produced in customized diameters, lengths, head configurations and thread forms. They are suitable for assemblies where refractory-metal performance is required.
➤ C-103 Niobium Screws
C-103 screws are available as machined components for specialized equipment and high-temperature assemblies.
➤ Niobium C-103 Stud Bolts
Stud bolts are available as single-end or double-end configurations according to the application drawing.
➤ Niobium C-103 Flange Stud Bolts
Niobium C-103 Flange Stud Bolts can be manufactured according to customer drawings and specified flange dimensions, thread requirements and tolerances.
➤ Other C103 Fasteners
- Hex head bolts
- Socket head screws
- Machine screws
- Threaded studs
- Double-end studs
- Nuts
- Washers
- Custom CNC-machined fasteners
- Special aerospace fasteners
Chemical Composition of UNS R04295 C103
| Element | Composition |
|---|---|
| Niobium (Nb) | Balance / ≥88% |
| Hafnium (Hf) | 9.0–11.0% |
| Titanium (Ti) | 0.7–1.3% |
| Tantalum (Ta) | ≤0.50% |
| Tungsten (W) | ≤0.50% |
| Zirconium (Zr) | ≤0.70% |
| Carbon (C) | ≤0.015% |
| Oxygen (O) | ≤0.05% |
Mechanical Properties of Niobium C103 Fasteners
| Property | Reference Value / Condition |
|---|---|
| Density | ~8.85 g/cm³ |
| Tensile strength | Product-form dependent |
| Yield strength | Product-form dependent |
| Elongation | Product-form dependent |
| Melting point | ~2350°C |
| Maximum service temperature | Application dependent |
| High-temperature capability | Excellent for refractory-alloy applications |
| Ductility | Useful ductility at cryogenic temperatures |
| Weldability | Generally considered good with controlled procedures |
Physical Properties of C103 Niobium Alloy
| Physical Property | Approximate Value |
|---|---|
| Density | 8.85 g/cm³ |
| Density | 0.320 lb/in³ |
| Melting point | 2350°C |
| Melting point | 4260°F |
| Specific heat at 100°C | ~0.343 J/g·°C |
| Maximum service temperature in air* | ~1480°C / 2700°F |
Manufacturing of Niobium C-103 Fasteners
Niobium C-103 Fasteners Weight Chart
| Nominal Diameter | Approx. Weight per Metre |
|---|---|
| 6 mm | 0.250 kg |
| 8 mm | 0.445 kg |
| 10 mm | 0.695 kg |
| 12 mm | 1.001 kg |
| 16 mm | 1.779 kg |
| 20 mm | 2.780 kg |
| 24 mm | 4.004 kg |
| 30 mm | 6.256 kg |
| 36 mm | 9.008 kg |
| 40 mm | 11.121 kg |
Equivalent Grades of Niobium C-103
| Designation | Description |
|---|---|
| C-103 | Common alloy designation |
| C103 | Alternative written designation |
| UNS R04295 | UNS material designation |
| Nb-10Hf-1Ti | Alloy composition designation |
| Niobium-Hafnium-Titanium Alloy | Generic material description |
| ASTM B655 R04295 | Bar, rod and wire material specification |
| ASTM B652 R04295 | Ingot material specification |
Applications of C-103 Niobium Bolts and Screws
The combination of high-temperature capability and refractory-alloy characteristics makes C-103 suitable for specialized applications.
Typical applications include:
- Aerospace propulsion systems
- Rocket engine components
- Rocket nozzle assemblies
- Spacecraft hardware
- Launch vehicle components
- Satellite systems
- High-temperature experimental equipment
- Specialized aerospace structures
- Propulsion-related assemblies
Published technical data specifically associate C-103 with rocket and jet propulsion applications and report high-temperature strength retention for certain applications.
Niobium C-103 Fasteners Manufacturer and Exporter
As a Niobium C-103 Fasteners Manufacturer, we can support custom requirements based on technical drawings and agreed material specifications.
We also supply C103 Niobium Bolts Supplier in India for international customers requiring C-103 bolts, screws, studs and custom components.
For buyers searching for an AMS 7857 C-103 Niobium Fasteners Stockist, the applicable AMS material specification should be confirmed against the required product form and order documentation before supply.
Why Choose Us for Niobium C-103 Fasteners?
We focus on specialized alloy fasteners where material traceability and dimensional accuracy are important.
- C-103 / UNS R04295 material
- Nb-10Hf-1Ti alloy fasteners
- Bolts, screws and stud bolts
- C-103 flange stud bolts
- Custom dimensions
- Metric and inch threads
- Drawing-based manufacturing
- Material documentation
- Inspection support
- Small and bulk order requirements
- India and export supply
Order Niobium C-103 Fasteners
Looking for Niobium C-103 Fasteners, UNS R04295 C103 Fasteners, Nb-10Hf-1Ti Alloy Fasteners, C-103 Niobium Bolts and Screws or Niobium C-103 Flange Stud Bolts?
Send us your drawing, fastener size, thread, quantity, material specification and certification requirements. We can review your requirement and provide a quotation for standard or custom C-103 fasteners.
