Tantalum tubes Tantalum- tungsten alloy tubes Material: RO5200， RO5400， RO5252(Ta-2.5W)， RO5255(Ta-10W) size: Diameter: φ1.0-150mm Thickness: 0.2-5.0mm Length: 100mm-12000mm Standard: As per ASTM B521-98
Table 1. Chemical composition:
Table2. Permissible variations in diameter & wall thickness
| Outside diameter， inch (mm) | Diameter tolerance， inch(mm)， +/- | Permissible variaton in wall thickness， ％， +/- |
| <1 (25.4) | 0.004 (0.102) | 5 |
| 1~1.5 (25.4~38.1) | 0.005 (0.127) | 5 |
| 1.5~2 (38.1~50.8) | 0.006 (0.152) | 5 |
| 2~2.5 (50.8~63.5) | 0.007 (0.178) | 5 |
| 2.5~3.5 (63.5~88.9) | 0.010 (0.254) | 5 |
Table3. Mechanical requirements (annealed condition)
| Grade | Tensile strength δbpsi (MPa)， ≥ | Yield strength δ0.2， psi (MPa)，≥ | Elongation in 1"/2" gage length， ％， ≥ |
| RO5200/RO5400 | 30000 (207) | 20000 (138) | 25 |
| RO5252 | 40000 (276) | 28000 (193) | 20 |
| RO5255 | 70000 (481) | 60000 (414) | 15 |
| RO5240 | 40000 (276) | 28000 (193) | 20 |
| Special requirements to be agreed on by the supplier and buyer of negotiation |
