Tantalum source is one kind of metallic element. Tantalum sources of our country make up 14.22% of total world’s tantalum storage. On recent market, demand for tantalum keep weak stability and
tantalum price
remains stable.Tantalum sheet
is produced from tantalum powder by cold rolling or hot rolling processing. Purity of tantalum sheet is 99.95％or 99.99％. Standard of tantalum sheet is conform with ASTM B 708 98.Properties of tantalum sheet:
Properties of tantalum sheet is same with those of tantalum, such as hard texture and high corrosion resistance.
Classifications of tantalum sheet:
Tantalum sheet can be grouped into tantalum plate, tantalum strip and tantalum foil according to different sizes.
Specifications of tantalum sheet:
Table 1: Sizes
| Size | Thickness (mm) | Width (mm) | Length (mm) |
| Foil | 0.03-0.07 | 30-200 | >50 |
| Sheet | 0.07-0.5 | 30- 700 | 30-2000 |
| Board | 0.5-10 | 50-1000 | 50-3000 |
Table 2: Chemical composition:
| chemistry% | |||||||||||||
| designation | chief component | impurities maximum | |||||||||||
| Ta | Nb | Fe | Si | Ni | W | Mo | Ti | Nb | O | C | H | N | |
| Ta1 | Remainder | -- | 0.004 | 0.003 | 0.002 | 0.004 | 0.006 | 0.002 | 0.03 | 0.01 | 0.004 | 0.0015 | 0.002 |
| Ta2 | Remainder | -- | 0.01 | 0.01 | 0.005 | 0.02 | 0.02 | 0.005 | 0.08 | 0.015 | 0.01 | 0.0015 | 0.01 |
| TaNb3 | Remainder | <3.5 | 0.01 | 0.01 | 0.005 | 0.02 | 0.02 | 0.005 | -- | 0.015 | 0.01 | 0.0015 | 0.01 |
| TaNb20 | Remainder |
17.0- 23.0 |
0.01 | 0.01 | 0.005 | 0.02 | 0.02 | 0.005 | -- | 0.015 | 0.01 | 0.0015 | 0.01 |
| Ta2.5W | Remainder | --- | 0.005 | 0.003 | 0.002 | 3.0 | 0.006 | 0.002 | 0.04 | 0.015 | 0.005 | 0.0015 | 0.006 |
| Ta10W | Remainder | -- | 0.005 | 0.003 | 0.002 | 11 | 0.006 | 0.002 | 0.04 | 0.015 | 0.005 | 0.0015 | 0.006 |
| special require to be agreed on by the supplier and buyer of negotiations. | |||||||||||||
Table 3. Mechanical requirements (annealed condition)
| Grade and size | Annealed | ||
|
Tensile strength min， psi (MPa) |
Yield strength min，psi (MPa)(2％) | Elongation min， ％ (1 inch gage length) | |
|
Sheet， foil. and board (RO5200， RO5400) Thickness<0.060"(1.524mm) Thickness≥0.060"(1.524mm) |
30000 (207) | 20000 (138) | 20 |
| 25000 (172) | 15000 (103) | 30 | |
|
Ta-10W (RO5255) Sheet， foil. and board |
70000 (482) | 60000 (414) | 15 |
| 70000 (482) | 55000 (379) | 20 | |
|
Ta-2.5W (RO5252) Thickness<0.125" (3.175mm) Thickness≥0.125" (3.175mm) |
40000 (276) | 30000 (207) | 20 |
| 40000 (276) | 22000 (152) | 25 | |
|
Ta-40Nb (RO5240) Thickness<0.060"(1.524mm) |
40000 (276) | 20000 (138) | 25 |
| Thickness>0.060"(1.524mm) | 35000 (241) | 15000 (103) | 25 |
