Description
🔩 Premium Ta-2.5W Rod – Tantalum Tungsten Alloy for Vacuum Furnace & Lab Use
The Ta-2.5W Rod is a high-purity, high-performance alloyed refractory metal product composed of tantalum with 2.5% tungsten (W) by weight. It offers exceptional mechanical strength, thermal stability, and chemical inertness, making it ideal for extreme-temperature environments where conventional metals would deform, oxidize, or fail.
Produced through vacuum arc melting (VAM) or powder metallurgy and finished by forging, rolling, or centerless grinding, Ta-2.5W rods are widely used in vacuum furnaces, aerospace systems, lab heating components, sputtering targets, and radiation shielding.
✅ Key Material Features
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High Melting Point: With a melting point above 3000°C, this alloy is extremely heat-resistant and stable in vacuum and inert atmospheres.
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Superior Strength & Hardness: Tungsten improves tensile strength and hardness significantly compared to pure tantalum, especially under elevated temperatures.
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Improved Creep Resistance: The addition of 2.5% tungsten increases resistance to time-dependent deformation during prolonged thermal stress.
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Enhanced Recrystallization Temperature: Ta-2.5W recrystallizes above 1400°C, maintaining grain structure in heat cycles.
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Chemical Inertness: Excellent resistance to most mineral acids, including HCl, HNO₃, and sulfuric acid — unaffected by chloride stress corrosion.
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Weldable & Ductile: Maintains good formability and weldability despite its strength, allowing for complex fabrications and clean welds.
🧪 Typical Chemical Composition (wt%)
| Element | Content (%) |
|---|---|
| Tantalum (Ta) | ≥ 97.0 |
| Tungsten (W) | 2.3 – 2.7 |
| Oxygen (O) | ≤ 0.01 |
| Nitrogen (N) | ≤ 0.005 |
| Carbon (C) | ≤ 0.010 |
| Hydrogen (H) | ≤ 0.002 |
| Iron (Fe), Nickel, Silicon | ≤ 0.01 (each) |
🔍 Purity is strictly controlled via ICP-OES and LECO gas analysis. The surface can be provided in black (as-drawn), polished, or centerless ground finish.
📊 Mechanical Properties (Annealed Condition)
| Property | Typical Value |
|---|---|
| Tensile Strength | 550 – 650 MPa |
| Yield Strength | ≥ 400 MPa |
| Elongation | ≥ 25% |
| Hardness | 130 – 160 HV |
| Density | ~16.6 g/cm³ |
| Melting Point | 2995 – 3020°C |
| Recrystallization Temp | ~1400°C |
These values make Ta-2.5W Rods reliable in applications where metals like molybdenum, niobium, or standard tantalum cannot perform.
⚙️ Manufacturing Process
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Raw Material Sourcing: High-purity tantalum and tungsten powders or ingots are selected.
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Melting: Vacuum arc melting (VAM) or powder metallurgy (PM) is used for homogenization.
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Forging & Rolling: Heated billets are forged and hot-rolled into rods.
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Annealing: Vacuum annealed to refine grain structure and improve ductility.
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Finishing: Final diameter precision achieved by grinding, polishing, or turning.
Every production batch undergoes ultrasonic testing, chemical composition analysis, and mechanical property verification prior to shipment.
📐 Dimensions & Specifications
| Parameter | Range / Custom Options |
|---|---|
| Diameter | 2 mm – 60 mm |
| Length | 100 mm – 1500 mm |
| Tolerance | h9, h10, or by request |
| Surface | Polished / Ground / Black / Machined |
| Standard Lengths | 300 mm, 600 mm, 1000 mm (cuttable) |
Optional: machined ends, threads, or chamfered tips for lab hardware.
🏭 Applications
Due to its physical and chemical stability, Ta-2.5W Rod is widely used in:
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Vacuum Furnace Heating Rods
Long-term high-temperature components for sintering, brazing, and heat treating. -
Scientific Heating Systems
Heating elements, thermocouple sheaths, or sample holders in inert gas or vacuum conditions. -
Aerospace Hardware
Support rods, shielding frames, and load-bearing subcomponents in high-temp aerospace assemblies. -
Sputtering & Coating Systems
Base materials for sputtering targets and diffusion-resistant hardware in semiconductor production. -
Radiation & Medical Shielding
Components in imaging systems and surgical devices due to biocompatibility and X-ray attenuation.
📄 Standards & Certification
Our Ta-2.5W Rods conform to:
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ASTM B365 – Tantalum and Tantalum Alloy Rod and Wire
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ASTM F560 – Implant-grade tantalum specification (if required)
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AMS 7845 – Optional finish standards for tantalum alloys
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ISO 9001 / EN 10204 3.1 documentation
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Optional: SGS/BV third-party inspection, MSDS, COO
📎 Learn more about the alloy system here:
🔗 Total Materia – High-Temp Alloy Database
📦 Packaging & Logistics
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📦 Rods are individually wrapped in moisture-resistant paper or vacuum bags
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🔒 Foam-lined or foam-filled export-grade wooden crates
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🏷 Marked with alloy grade, size, lot number, and heat code
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🌍 Global delivery by air (DHL/FedEx) or sea with full export documentation
📞 Contact Us
Looking for high-purity tantalum tungsten alloy rods for your thermal, chemical, or vacuum system? Our Ta-2.5W Rods deliver unmatched consistency, machinability, and performance under extreme operating conditions.
📧 Email: sales@niticu.com
📱 Phone / WhatsApp / WeChat: +86 13335373172
🏭 Factory: Baotai Road Industrial Park, High-tech Zone, Baoji City, Shaanxi, China
🌐 Website: https://niticu.com
📩 Request a quote, MSDS, or sample today. Our engineers respond within 24 hours.
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