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High pure tantalum foil, tantalum strip ASTM B708
R05200 R05400 R05252 R05255 Ta1 Ta2 ASTMB708 tantalum foil/strip
1. Dimensions and tolerances
1.1 Tolerances of thickness, width and length
| Thickness | Thickness tolerance | Width | Width tolerance | Length | Length tolerance | |
| Class 1 | Class 2 | |||||
| 0.01~0.02 | ±0.002 | ±0.003 | 30~120 | ±2.0 | ≥200 | ±3.0 |
| >0.02~0.05 | ±0.003 | ±0.004 | 30~120 | ±2.0 | ≥200 | ±3.0 |
| >0.05~0.07 | ±0.005 | ±0.006 | 30~150 | ±2.0 | ≥200 | ±3.0 |
| >0.07~0.09 | ±0.006 | ±0.008 | 70~150 | ±2.0 | ≥200 | ±3.0 |
1.2 Flatness
Flatness: Max. 3 % determined in accordance with ASTM B708
2. Surface condition
| Surface: | The sheets are free from impurities, splits, fractures and indentations,having an impact on a common processing or application of the product. |
| Surface roughness: | Cold rolled. bright: Ra ≤ 1.20 μm Cold rolled. ground: Ra ≤ 1.60 μm Cold rolled. pickled (dull): Ra ≤ 2.00 μm |
