🔩 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

High Melting Point: With a melting point above 3000°C, this alloy is extremely heat-resistant and stable in vacuum and inert atmospheres.
Superior Strength & Hardness: Tungsten improves tensile strength and hardness significantly compared to pure tantalum, especially under elevated temperatures.
Improved Creep Resistance: The addition of 2.5% tungsten increases resistance to time-dependent deformation during prolonged thermal stress.
Enhanced Recrystallization Temperature: Ta-2.5W recrystallizes above 1400°C, maintaining grain structure in heat cycles.
Chemical Inertness: Excellent resistance to most mineral acids, including HCl, HNO₃, and sulfuric acid — unaffected by chloride stress corrosion.
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

Raw Material Sourcing: High-purity tantalum and tungsten powders or ingots are selected.
Melting: Vacuum arc melting (VAM) or powder metallurgy (PM) is used for homogenization.
Forging & Rolling: Heated billets are forged and hot-rolled into rods.
Annealing: Vacuum annealed to refine grain structure and improve ductility.
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:

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:

ASTM B365 – Tantalum and Tantalum Alloy Rod and Wire
ASTM F560 – Implant-grade tantalum specification (if required)
AMS 7845 – Optional finish standards for tantalum alloys
ISO 9001 / EN 10204 3.1 documentation
Optional: SGS/BV third-party inspection, MSDS, COO

📎 Learn more about the alloy system here:
🔗 Total Materia – High-Temp Alloy Database

📦 Packaging & Logistics

📦 Rods are individually wrapped in moisture-resistant paper or vacuum bags
🔒 Foam-lined or foam-filled export-grade wooden crates
🏷 Marked with alloy grade, size, lot number, and heat code
🌍 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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