Tantalum Foil – ASTM B708

🔹 Overview

Tantalum Foil is a high-purity, ductile refractory metal product known for its exceptional corrosion resistance, high melting point, and superb thermal conductivity. This ultra-thin foil form of tantalum is particularly useful in industries requiring reliable performance in extreme conditions, such as semiconductor manufacturing, vacuum furnace environments, aerospace components, and laboratory research apparatus.

Manufactured with precision and quality control, our tantalum foil is produced using electron beam or vacuum arc melting followed by cold rolling and annealing processes. It conforms to ASTM B708 specifications and is available in multiple grades, including RO5200 (unalloyed) and RO5400 (alloyed) options. Typical foil purity levels reach 99.95% and above, ensuring superior performance in chemically aggressive or high-temperature settings.

🧪 Chemical Composition (Typical, 99.95%)

Element	Content (wt%)
Tantalum (Ta)	≥ 99.95%
Niobium (Nb)	≤ 0.01%
Iron (Fe)	≤ 0.005%
Silicon (Si)	≤ 0.003%
Tungsten (W)	≤ 0.01%
Carbon (C)	≤ 0.01%
Oxygen (O)	≤ 0.015%
Nitrogen (N)	≤ 0.01%

⚙️ Mechanical & Physical Properties

Property	Typical Value
Melting Point	3017°C
Density	16.6 g/cm³
Tensile Strength	200–550 MPa (depending on temper)
Yield Strength	150–500 MPa
Elongation	≥ 20%
Hardness	90–160 HV
Electrical Resistivity	~13.5 μΩ·cm
Thermal Conductivity	~57 W/m·K

These properties make tantalum foil ideal for precise, high-temperature, and chemically reactive applications that demand minimal contamination and excellent material stability.

💡 Key Features

🌡️ Extreme Heat Resistance: Operates reliably above 2500°C
🧪 Inert to Most Acids: Unaffected by HCl, HNO3, and sulfuric acid below 150°C
⚙️ Excellent Formability: Suitable for deep drawing, stamping, and rolling
🧲 Non-Magnetic and Low Reactivity: Ideal for sensitive electronic or vacuum applications
💎 Surface Finish: Bright or matte; mirror-polished option available
🧼 Cleanroom-Grade Available: For semiconductor and medical environments
📏 Tight Tolerances: Custom width/thickness down to microns
🔧 Machinability: Easily cut, etched, and stamped for precise patterning in electronics
🛡️ Oxide Layer Control: Thin natural oxide film enhances stability in vacuum systems

📐 Sizes & Customization

Our Advanced Tantalum Foil is available in:

Thickness: 0.01 mm to 0.5 mm
Width: up to 300 mm
Length: coils or sheets (custom length upon request)
Surface: Cold-rolled, bright-annealed, or chemically cleaned
Packaging: Vacuum-sealed rolls or moisture-proof crates

We also offer:

Precision slit coils for sputtering targets and capacitor anodes
Alloy variations such as Ta-2.5W and Ta-10W for extended applications
Cleanroom washing, double vacuum packaging, and third-party lab testing upon request

🧪 Applications

Tantalum Foil is widely used in:

🧬 Semiconductor Industry: Diffusion barriers, sputtering targets, and integrated circuit base layers
🔬 Laboratory Equipment: Crucibles, heat shields, and liner material for high-vacuum devices
🚀 Aerospace and Defense: Propulsion systems, heat shields, and radiation containment
⚛️ Nuclear Technology: Radiation-resistant components and structural elements
🧫 Medical Sector: X-ray shielding, diagnostic components, and implantable devices
🔋 Battery Technology: Advanced lithium and sodium battery collectors
🧯 Chemical Processing: Highly corrosive acid handling, reaction vessels, and liners
📡 Electronics: Capacitor foils, EMI shielding, and high-frequency filters

📜 Certifications & Standards

📘 ASTM B708 – Specification for Tantalum and Tantalum Alloy Strip, Sheet, and Plate
✅ RoHS & REACH Compliant
🧾 Mill Test Certificate (EN 10204 3.1)
🔍 Third-party inspection supported: SGS, BV, TUV
🔬 Test reports available for chemical composition, mechanical properties, and microstructure

🌐 Export & Logistics

📦 Global shipping with secure vacuum packing
🧾 Export-ready documents: COO, Invoice, Packing List, MTC
🌍 Fast dispatch: 5–10 business days for standard sizes
✈️ Optional DHL/FedEx/TNT air freight or sea freight options
📞 Multilingual support and technical consulting available

🤝 Why Choose NiTiCu Metal?

🏭 Located in China’s Titanium Valley – Baoji
🔧 Advanced rolling and annealing equipment
📐 Precision down to micron-level thickness control
🔍 On-site QC and ISO-certified manufacturing
🕒 24/7 support with engineering expertise
📩 Fast quotes, samples, and export compliance

📞 Contact Us

📧 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

📩 Contact us now to get the latest quote or request a material datasheet!

Compare Material Options

Tantalum Plate – ASTM B708, 99.95%

Select the material specified by your process. Confirm composition, condition and inspection requirements before ordering.

Browse tantalum products or send your drawing and requirements for a quotation.

Tantalum Foil

Tantalum Foil – ASTM B708, Custom Thickness

Advanced Metals, Engineered for What Comes Next.