Tantalum (R05200 Reference)
Tantalum is a refractory metal with exceptional resistance to many acids because of its stable protective oxide film. Since 'tantalum' is a material family rather than a single grade, this page uses wrought unalloyed UNS R05200 as the engineering reference.
Tantalum (R05200 Reference) Information
Tantalum is a refractory metal with exceptional resistance to many acids because of its stable protective oxide film. Since 'tantalum' is a material family rather than a single grade, this page uses wrought unalloyed UNS R05200 as the engineering reference.
Metallic winding and compatible ring components where service conditions are suitable.
| Material specification | ASTM B708 |
|---|---|
| Specified grade / UNS | Tantalum R05200 |
Tantalum (R05200 Reference) Chemical Composition
ASTM B708 · Grade-specific requirements
| Element / requirement | Value |
|---|---|
| C % | ≤0.010 |
| O % | ≤0.015 |
| N % | ≤0.010 |
| H % | ≤0.0015 |
| Fe % | ≤0.010 |
| Mo % | ≤0.020 |
| Nb % | ≤0.100 |
| Ni % | ≤0.010 |
| Si % | ≤0.005 |
| Ti % | ≤0.010 |
| W % | ≤0.050 |
| Ta | Remainder |
Tantalum (R05200 Reference) Mechanical Properties
ASTM B708 · Grade-specific requirements
| Product form / condition | Tensile min (MPa) | Yield min (MPa) | Elongation min (%) | Hardness |
|---|---|---|---|---|
| Annealed · Thickness <0.060 in. (1.524 mm) | 207 | 138 | 20 | — |
| Annealed · Thickness ≥0.060 in. (1.524 mm) | 172 | 103 | 30 | — |
ASTM B708 Grade Reference
Tantalum R05200
The chemical and mechanical tables on this page use the ASTM B708 requirements for this grade, including the product conditions listed in the standard overview.
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