Ductile 99.95%–99.99% electron-beam melted tantalum and niobium foils, plates, rods, tubes, and deep-drawn crucibles combining glass-like acid immunity with 3,017 °C refractory performance.
Unlike tungsten and molybdenum—which embrittle after high-temperature recrystallization—electron-beam melted tantalum (mp 3,017 °C) and niobium (mp 2,477 °C) remain extraordinarily ductile even at cryogenic temperatures and after high-vacuum thermal cycling. At chemical process temperatures (<150–200 °C), tantalum's passive Ta2O5 film rivals glass and PTFE against boiling HCl, H2SO4, HNO3, and bromine; in high vacuum (<10⁻⁵ Torr), tantalum crucibles and foils serve as non-carburizing barriers for rare-earth metals, actinide/lanthanide distillation, and SPS punch liners.
Supplied as bright cold-rolled vacuum-annealed foils (down to 10–25 µm), plates, rods, seamless tubes, and seamless deep-drawn or welded crucibles.
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| Purity | ≥99.95% (3N5) & ≥99.99% (4N); Nb low-Ta / high-RRR grades available |
| Melting Points | 3,017 °C (Tantalum) / 2,477 °C (Niobium) |
| Densities | 16.65 g/cm³ (Tantalum) / 8.57 g/cm³ (Niobium) |
| Foil Thickness Range | 0.010 mm (10 µm), 0.025, 0.05, 0.10, 0.25, 0.50 mm |
| Required High-Temp Atmosphere | High Vacuum (<10⁻⁵ Torr) or Ultra-Pure Argon ONLY (absorbs H2, N2, O2!) |
Reference values reflect typical sintered, fused, or wrought grades. Exact batch test figures are confirmed on your written quotation and accompanying lot Certificate of Analysis.
Specify Tantalum vs. Niobium (or Ta-2.5W / Ta-10W alloy), purity (3N5 vs. 4N), form (foil thickness × width × length, rod, tube, or seamless deep-drawn crucible OD × wall × height), annealed vs. hard-rolled temper, and operating environment.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare Tantalum & Niobium Foils, Sheets, Rods & Crucibles RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
TB-W-CMPUltra-high-melting-point (3,422 °C) 99.95%+ pure tungsten crucibles, centerless-ground rods, rolled sheets, wire, and hot-zone elements for extreme vacuum thermal systems.
TB-MO-CMP99.95% pure molybdenum, lanthanated Mo-La, and TZM alloy sintering boats, rolled sheets, rods, crucibles, fasteners, and carbon-free vacuum furnace heat shields.
TB-TI-GRCommercially pure (Grade 1/2), Ti-6Al-4V (Grade 5), and 99.99% high-purity titanium foils, plates, rods, woven/expanded mesh, and MMO-coated electrochemical anodes.
TB-PVD-BT99.95% pure tungsten, molybdenum, and tantalum resistive thermal evaporation boats, baffled box sources, and stranded tungsten wire baskets/coils.
Submit your purity grade, geometry, quantity, and documentation requirements. Every order includes the producing mill's batch Certificate of Analysis (COA) and pre-shipment dimensional verification.