ASTM B521 Tantalum and Tantalum Alloy Tube
- Type: Seamless and Welded Tube
- UNS Grade R05400—Unalloyed Tantalum, powder-metallurgy consolidation
- UNS Grade R05200—Unalloyed Tantalum, VAM
- UNS Grade R05252—Tantalum + 2.5% Tungsten alloy, VAM (Ta2.5W)
- UNS Grade R05255—Tantalum + 10% Tungsten alloy, VAM (Ta10W)
- UNS Grade R05240—Tantalum alloy, 60% Tantalum, 40% Niobium, EB furnace, VAM, or both (Ta40Nb)
ASTM B521 Seamless and Welded Tantalum Tube, and Tantalum Alloy Tube
Golden Sunbird Metals supplies premium ASTM B521 tantalum tube — both seamless and welded — in five high-purity grades: R05200, R05400, R05252, R05255, and R05240. Engineered for the most demanding corrosion-resistant and high-temperature environments, these tubes deliver exceptional chemical inertness, outstanding thermal stability, and excellent mechanical properties. Available in outside diameters from 9.53–88.9 mm, wall thicknesses of 0.5–12.7 mm, and lengths up to 6000 mm, our ASTM B521 tantalum tubes feature a clean, smooth finish ideal for precision fabrication, welding, and assembly. Whether you require tantalum tubing for chemical processing equipment (heat exchangers, condensers, reactors, and piping), semiconductor manufacturing, aerospace components, vacuum systems, or medical devices, our material meets the strictest industry standards with full EN 10204 3.1/3.2 mill test certification.
UNS Grade R05400—Unalloyed tantalum, powder-metallurgy consolidation.
UNS Grade R05200—Unalloyed tantalum, vacuum melted.
UNS Grade R05252—Tantalum + 2.5 % tungsten alloy, vacuum melted.
UNS Grade R05255—Tantalum + 10 % tungsten alloy, vacuum melted.
UNS Grade R05240—Tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace, vacuum arc melt, or both.
Chemical Composition (Ingot Chemical Requirements wt.%) of ASTM B521 Tantalum and Tantalum Alloy Tube
| Element | R05200 | R05400 | R05252 | R05255 | R05240 |
| Oxygen (O) | Max 0.015% | Max 0.030% | Max 0.015% | Max 0.015% | Max 0.020% |
| Nitrogen (N) | Max 0.010% | Max 0.010% | Max 0.010% | Max 0.010% | Max 0.010% |
| Carbon (C) | Max 0.010% | Max 0.010% | Max 0.010% | Max 0.010% | Max 0.010% |
| Hydrogen (H) | Max 0.0015% | Max 0.0015% | Max 0.0015% | Max 0.0015% | Max 0.0015% |
| Niobium (Nb) | Max 0.10% | Max 0.10% | Max 0.50% | Max 0.10% | 35.0-42.0% |
| Tungsten (W) | Max 0.050% | Max 0.050% | 2.0-3.5% | 9.0-11.0% | Max 0.050% |
| Tantalum (Ta) | (Remainder) | (Remainder) | (Remainder) | (Remainder) | (Remainder) |
Mechanical Properties of ASTM B521 Tantalum and Tantalum Alloy Tube
| Grade | Ultimate Tensile Strength (min) | Yield Strength (0.2% offset, min) | Elongation (min) |
| R05200/R05400 | 30,000 psi (207 MPa) | 20,000 psi (138 MPa) | 25% |
| R05252 | 40,000 psi (276 MPa) | 28,000 psi (193 MPa) | 20% |
| R05255 | 70,000 psi (481 MPa) | 60,000 psi (414 MPa) | 15% |
| R05240 | 40,000 psi (276 MPa) | 28,000 psi (193 MPa) | 20% |
Features
- ASTM B521 tantalum and tantalum alloy seamless and welded tubes for demanding corrosion-resistant and high-temperature service.
- Available grades include R05400, R05200, R05252, R05255, and R05240.
- Supplied in clean, smooth finish with controlled dimensions for precision fabrication.
- Excellent resistance to acids, alkalis, and salt solutions, making the material suitable for aggressive environments.
- High melting point and strong thermal stability for elevated-temperature applications.
- Inspection options such as EN 10204 3.1 / 3.2 and hydrostatic, pneumatic, or ultrasonic testing are available.
Technical Specifications
| Specification | Value |
| Standard | ASTM B521 Tantalum and Tantalum Alloy Seamless and Welded Tubes |
| Grade | UNS Grade R05400—Unalloyed tantalum, powder-metallurgy consolidation, UNS Grade R05200—Unalloyed tantalum, vacuum melted, UNS Grade R05252—Tantalum + 2.5% tungsten alloy, vacuum melted. (Ta2.5W) UNS Grade R05255—Tantalum + 10% tungsten alloy, vacuum melted. (Ta10W) UNS Grade R05240—Tantalum alloy, 60% tantalum, 40% niobium, electron-beam furnace, vacuum arc melt, or both. (Ta40Nb) |
| Seam Type | Seamless and Welded |
| Finish | Clean, smooth finish |
| Tube Size | Outside Diameter (OD) Range: 9.53-88.9mm, Wall Thickness (WT) Range: 0.5-12.7mm |
| Length | 100-6000mm |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Chemical analysis, Tensile test, Flaring test, Reverse Flattening test, NDE Tests (Hydrostatic, Pneumatic, or Ultrasonic tests) |
Applications
- Chemical processing equipment such as heat exchangers, condensers, piping systems, reactors, and pumps.
- Semiconductor manufacturing equipment and other corrosion-critical process systems.
- Aerospace components and high-temperature hardware requiring corrosion resistance and thermal stability.
- Vacuum, laboratory, and high-purity process tubing.
- Medical and biocompatibility-sensitive uses can be mentioned as a secondary market, but I would keep it lower in the list than chemical and semiconductor uses.
