Chemical composition:
| Brand name | Ta1 | Ta2(doped) | ||
| ChemicalCompositions （%） |
Ta≥ | 99.95 | 99.95 | |
| Impurities | O | 0.0200 | 0.0200 | |
| C | 0.0050 | 0.0050 | ||
| N | 0.0040 | 0.0040 | ||
| H | 0.0015 | 0.0015 | ||
| Fe | 0.0045 | 0.0045 | ||
| Ni | 0.0025 | 0.0025 | ||
| Cr | 0.0025 | 0.0025 | ||
| Nb | 0.0050 | 0.0050 | ||
| Mo | 0.0020 | 0.0020 | ||
| W | 0.0020 | 0.0020 | ||
| Ti | 0.0005 | 0.0005 | ||
| Sn | 0.0010 | 0.0010 | ||
| Ca | 0.0010 | 0.0010 | ||
| Na | 0.0020 | 0.0020 | ||
| Al | 0.0005 | 0.0005 | ||
| Si | 0.0030 | 0.0030 | ||
Surface: Smooth surface, clean, no oil, cracks and burrs, no tangling, knotting, crossover, etc.
Size and tolerance:
| Diameter (mm) | Tolerance (mm) |
| 0.06 0.10 .011 .015 | ±0.005 |
| 0.17 0.19 0.20 0.24 0.25 0.29 0.30 | ±0.006 |
| 0.33 0.34 0.35 0.381 0.4 0.47 0.50 | ±0.007 |
| 0.60 0.80 | ±0.01 |
Mechanical properties:
| Type | Tensile strength Rm/(N/mm2) | ElongationA200mm/% |
| Soft（M） | 300～750 | 10～30 |
| Semi-hard（Y2） | 750～1250 | 1～6 |
| Hard（Y） | >1250 | 1～5 |
Antioxidant brittleness:
| Brand name | D/mm | Anti-oxidative brittle bending times, not less than |
| Ta1 | 0.10～0.40 | 3 |
| >0.40 | 4 | |
| Ta2(doped) | 0.10～0.40 | 4 |
| >0.40 | 6 |
Straightness: Arc degree is greater than or equal to 800mm diameter. Lift height is less than 20mm.