Tantalum Wire (Straight Wire, Spooled and Coiled Wire)
Princeton Powder is a leading US supplier of ASTM B365 tantalum wire and ASTM F560 medical grade tantalum wire, offering straight tantalum wire, spooled tantalum wire, and coiled tantalum wire in custom diameters and lengths. Our high‑purity tantalum wire ASTM B365 is manufactured via cold drawing and precision annealing to deliver stable mechanical properties, exceptional corrosion resistance, biocompatibility, and a high melting point. It fully complies with ASTM B365 specifications and is widely used in electronics, implantable medical devices, aerospace, and chemical processing.
Material | Tantalum Wire, Ta Wire |
CAS Number | 7440-25-7 |
Standard | ASTM B365, ASTM F560 (Medical Grade) |
Grade | R05200, R05400, R05252 (Ta2.5W), R05255 (Ta10W), R05240 (Ta40Nb) |
| Density | 16.65 g/cm3 |
Melting Point | 3020 ℃ |
Diameter | 0.004″ – 0.125″ diameter x L, customized |
Form | Straight Wire, Coiled Wire, Spooled Wire |
Surface Treatment | Pickling or Polishing |
Description of Tantalum Wire, Rod, Bar & Tube
Tantalum wire is a high-purity metal wire known for its exceptional corrosion resistance and high melting point. It is widely used in the electronics industry for manufacturing capacitors, where its conductive properties are essential. Due to its biocompatibility, tantalum wire is also utilized in medical applications, including implants and surgical devices. Its unique properties make it suitable for various demanding environments, such as chemical processing and aerospace.
High‑Purity Tantalum Wire ASTM B365 – Grades & Chemical Composition
Grade | Chemical Composition (≤%） | |||||||||||
Ta | Fe | Si | Ni | W | Mo | Ti | Nb | O | C | H | N | |
Ta1 | Bal. | 0.005 | 0.005 | 0.002 | 0.01 | 0.01 | 0.002 | 0.03 | 0.015 | 0.01 | 0.0015 | 0.01 |
Ta2 | Bal. | 0.03 | 0.02 | 0.005 | 0.04 | 0.03 | 0.005 | 0.1 | 0.02 | 0.01 | 0.0015 | 0.01 |
TaNb3 | Bal. | 0.03 | 0.03 | 0.005 | 0.04 | 0.03 | 0.005 | <3.5 | 0.02 | 0.01 | 0.0015 | 0.01 |
TaNb20 | Bal. | 0.03 | 0.03 | 0.005 | 0.04 | 0.03 | 0.005 | 17.0-23.0 | 0.02 | 0.01 | 0.0015 | 0.01 |
Ta2.5W | Bal. | 0.005 | 0.005 | 0.002 | 3.0 | 0.01 | 0.002 | 0.04 | 0.015 | 0.01 | 0.0015 | 0.01 |
Ta10W | Bal. | 0.005 | 0.005 | 0.002 | 11 | 0.01 | 0.002 | 0.04 | 0.015 | 0.01 | 0.0015 | 0.01 |
Physical Properties of Tantalum Wire, Rod, Bar, and Tube
| Product condition | Tensile strength (MPa) | Elongation, % |
| Annealed | 300～600 | 10～30 |
| Half annealed | >600～1000 | <5 |
Unannealed | >1000 | <5 |
Physical Properties of Tantalum Wire
- ASTM Compliance：Full conformance to ASTM B365 & medical ASTM F560 for regulated industries.
- High Purity & Consistency：Cold drawing + precision annealing for stable mechanicals & purity.
- Broad Grading：Unalloyed Ta & Ta–W, Ta–Nb alloys for electronics, implant, chemical, aerospace.
- Customization：Diameter, length, spooling, surface finish tailored to your process.
Applications of ASTM B365 Tantalum Wire
Tantalum Wire for Electronics ASTM B365: Used in capacitors, resistors, anode leads, and high‑reliability electronic components.
Tantalum Wire for Medical Devices ASTM B365: Biocompatible tantalum wire and medical grade ASTM B365 tantalum wire for surgical implants and instruments.
Tantalum Wire for Aerospace & High Temperature: High temperature tantalum wire with excellent heat resistance for extreme environments.
Tantalum Wire for Chemical Processing: Corrosion resistant tantalum wire for harsh chemical handling equipment.