Tantalum Supplier – Tantalum & Tantalum Alloy Plate, Bar, Tube, Fittings, Flanges & Fasteners
ASC LLP, Mumbai, supplies tantalum and tantalum alloys – unalloyed R05200 and R05400, Ta-2.5W (R05252), Ta-10W (R05255) and Ta-40Nb (R05240) – as plate, sheet, foil, bar, rod, wire, seamless and welded pipe and tube, fittings, flanges and fasteners, to ASTM B708, B365 and B521 with EN 10204 3.1 certificates, for chemical, pharmaceutical, electronics and medical customers worldwide.
What is Tantalum?
Tantalum (Ta, atomic number 73) is a dense, ductile refractory metal – not a steel – with a melting point of about 3,017 °C and a density of 16.6 g/cm³. Its thin, stable oxide film makes it almost completely inert to hot hydrochloric, nitric and sulphuric acids, which is why tantalum is the material of choice for heat exchangers, condensers, bayonet heaters and linings in the harshest acid service.
Tantalum has three important limits: it is attacked by hydrofluoric acid and fluorides, fuming sulphuric acid (oleum) and hot strong alkalis; it oxidises in air above about 300 °C; and it can absorb hydrogen and become brittle if it is coupled galvanically to a less noble metal in acid.
Key Properties of Tantalum
- Melting point: ≈ 3,017 °C (5,463 °F)
- Density: 16.6 g/cm³ – about twice that of niobium
- Corrosion resistance: outstanding in hot HCl, HNO₃, H₂SO₄ (below oleum strength), bromine and chlorine
- Ductility: cold-formable and deep-drawable; supplied annealed
- Weldability: TIG or electron-beam welding in high-purity argon or vacuum
- Biocompatibility: used for implants and surgical devices
Tantalum Grades We Supply
| Grade | UNS | Composition | Main use |
| Unalloyed tantalum (EB / VAR melted) | R05200 | Ta 99.9%+ | Standard grade for heat exchangers, linings and process piping |
| Unalloyed tantalum (powder metallurgy) | R05400 | Ta 99.9%+ | General corrosion service, fine-grain sheet and wire |
| Ta-2.5W | R05252 | 2.0–3.5% tungsten | Higher strength, thinner walls, hot concentrated acids |
| Ta-10W | R05255 | 9.0–11.0% tungsten | Highest strength; high-temperature and aerospace parts |
| Ta-40Nb | R05240 | 35–42% niobium | Lower-cost option where conditions are less severe |
ASTM Specifications for Tantalum
| Specification | Product form |
| ASTM B708 | Tantalum and tantalum alloy plate, sheet and strip |
| ASTM B365 | Tantalum and tantalum alloy rod and wire |
| ASTM B521 | Tantalum and tantalum alloy seamless and welded tubes |
| ASTM B364 | Tantalum and tantalum alloy ingots |
Fittings, flanges and fasteners are machined or formed from material to these standards.
Which Tantalum Grade Should You Choose?
- Most acid service (heat exchangers, linings, piping): R05200.
- Thinner walls or higher pressure: Ta-2.5W (R05252).
- Maximum strength or high-temperature parts: Ta-10W (R05255).
- Lower budget, milder conditions: Ta-40Nb (R05240).
- Cost-sensitive acid service where tantalum is not essential: consider niobium.
Tantalum Wire
Tantalum Coiled Tubes
Tantalum Product Directory – All Forms & Grades
Select a product form and grade to see chemistry, mechanical properties, sizes and specifications.
| Product form | Grades & pages |
| Tantalum Plates & Sheets | Tantalum plates, sheets & foil |
| Tantalum Bars, Rods & Wire | Tantalum bars & rods |
| Tantalum Pipes & Tubes | Tantalum seamless pipes & tubes · Tantalum welded pipes & tubes · R05200 tantalum pipes · R05400 tantalum pipes · R05252 (Ta-2.5W) pipes · R05255 (Ta-10W) pipes · R05240 (Ta-40Nb) pipes |
| Tantalum Fittings | All tantalum fittings · R05200 fittings · R05400 fittings · R05252 fittings · Ta-2.5W fittings · R05255 fittings · Ta-10W fittings · R05240 fittings |
| Tantalum Flanges | All tantalum flanges · R05200 flanges · R05400 flanges · R05252 flanges · R05255 flanges · R05240 flanges |
| Tantalum Fasteners | All tantalum fasteners · R05200 · R05400 · R05252 · R05255 · R05240 · Ta-7.5W · Ta-3Nb · Ta-20Nb · Ta-30Nb · Ta-40Nb |
Mechanical Properties of Tantalum Grades
| Grade (annealed) | Tensile strength (min) | 0.2% yield (min) | Elongation (min) |
| R05200 / R05400 (Ta) | 207 MPa (30 ksi) | 138 MPa (20 ksi) | 25% |
| R05252 (Ta-2.5W) | 276 MPa (40 ksi) | 193 MPa (28 ksi) | 20% |
| R05255 (Ta-10W) | 481 MPa (70 ksi) | 414 MPa (60 ksi) | 15% |
| R05240 (Ta-40Nb) | 276 MPa (40 ksi) | 193 MPa (28 ksi) | 20% |
Minimum values for annealed tube per ASTM B521; plate, sheet and bar follow ASTM B708 and B365. Cold-worked material is stronger and less ductile.
Physical Properties of Tantalum
| Property | Value (unalloyed Ta, approx.) |
| Density | 16.6 g/cm³ |
| Melting point | ≈ 3,017 °C (5,463 °F) |
| Modulus of elasticity | ≈ 186 GPa |
| Thermal conductivity | ≈ 57 W/m·K |
| Coefficient of thermal expansion | ≈ 6.5 µm/m·°C |
Tantalum Product Specifications
| Item | Details |
| Grades | UNS R05200, R05400, R05252 (Ta-2.5W), R05255 (Ta-10W), R05240 (Ta-40Nb) |
| Plate, sheet, strip, foil | ASTM B708 |
| Bar, rod, wire | ASTM B365 |
| Seamless and welded tube | ASTM B521 |
| Fittings, flanges, fasteners | Machined or formed from B708 / B365 / B521 material; to drawing or ASME dimensions |
| Condition | Annealed, pickled and clean |
| Certificate | EN 10204 3.1 with interstitial (C, O, N, H) analysis; third-party inspection on request |
Inspection, Testing & Packing
- Chemical analysis including interstitials (C, O, N, H)
- Tensile testing to the relevant ASTM standard
- Eddy-current or ultrasonic testing and pressure testing of tube
- Dimensional, surface and visual inspection; PMI
- Clean, protected export packing to avoid surface contamination
Applications of Tantalum Products
| Industry | Tantalum use |
| Chemical & pharmaceutical | Heat exchangers, condensers, bayonet heaters, thermowells, rupture discs, vessel linings and piping for hot acids |
| Electronics | Capacitor powder and wire, sputtering targets, vacuum and furnace components |
| Medical | Implants, surgical clips and radiographic markers |
| Aerospace & high temperature | Ta-10W parts for rocket and vacuum-furnace hot zones (vacuum or inert gas only) |
| Semiconductor & research | High-purity hardware, crucibles and vacuum components |
Why Choose ASC LLP as Your Tantalum Supplier?
- All grades and forms: R05200, R05400, Ta-2.5W, Ta-10W and Ta-40Nb in plate, bar, tube, fittings, flanges and fasteners.
- Seamless and welded tube to ASTM B521.
- Certified material: EN 10204 3.1 certificates with full heat traceability.
- Small and urgent orders: cut pieces, prototypes and stock sizes.
- Export-ready: secure packing and documentation for shipments worldwide.
Send grade, form, size and quantity to sales@amardeepsteel.com or call 022-67439130.
Frequently Asked Questions – Tantalum
What is tantalum used for?
Tantalum is used for chemical and pharmaceutical process equipment such as heat exchangers, condensers and linings, for electronic capacitors and sputtering targets, for medical implants, and as Ta-10W in high-temperature vacuum and aerospace parts.
Is tantalum a type of steel?
No. Tantalum is a pure refractory metal (element 73), not a steel. Tantalum products are made from unalloyed tantalum or tantalum alloys such as Ta-2.5W, Ta-10W and Ta-40Nb.
What attacks tantalum?
Tantalum is attacked by hydrofluoric acid and fluorides, fuming sulphuric acid (oleum) and hot strong alkalis. It oxidises in air above about 300 °C and can be embrittled by hydrogen if coupled to a less noble metal in acid.
Which ASTM standards cover tantalum?
ASTM B708 covers tantalum plate, sheet and strip, ASTM B365 rod and wire, ASTM B521 seamless and welded tubes, and ASTM B364 ingots.
What is the difference between R05200 and R05400 tantalum?
Both are unalloyed tantalum. R05200 is electron-beam or vacuum-arc melted, while R05400 is made by powder metallurgy and has a finer grain size. Both have the same minimum mechanical properties.
Why choose Ta-2.5W or Ta-10W instead of pure tantalum?
Tungsten raises strength. Ta-2.5W allows thinner walls for the same pressure while keeping tantalum-like corrosion resistance; Ta-10W is the strongest grade and is used for high-temperature and highly loaded parts.
Do you supply both seamless and welded tantalum tubes?
Yes. ASC LLP supplies seamless and welded tantalum and tantalum alloy tubes to ASTM B521 in all five grades.
