| Grade | FW-1 | FW-2 | |
| W≥99.95% | W≥99.9% | ||
| Impurities(%max） | Fe | 0.005 | 0.03 |
| Si | 0.002 | 0.005 | |
| Ca | 0.002 | 0.004 | |
| Al | 0.001 | 0.004 | |
| Mn | 0.001 | 0.002 | |
| Mg | 0.001 | 0.004 | |
| Ni | 0.003 | 0.004 | |
| Sb | 0.001 | 0.001 | |
| Cr | 0.001 | 0.004 | |
| As | 0.001 | 0.002 | |
| Pb | 0.0001 | 0.0005 | |
| Bi | 0.0001 | 0.0005 | |
| Sn | 0.0003 | 0.0005 | |
| Cu | 0.0007 | 0.001 | |
| Mo | 0.005 | 0.01 | |
| K | 0.0015 | 0.0015 | |
| Na | 0.0015 | 0.0015 | |
| S | 0.001 | 0.002 | |
| P | 0.001 | 0.004 | |
| C | 0.005 | 0.01 | |
| Type | Fsss | Scott Density | Oxygen Content |
| (um) | (g/cm3) | （%） | |
| 6 | 0.6-0.8 | 1.4-2.2 | 0.5 |
| 8 | 0.81-1.0 | 1.7-2.5 | 0.4 |
| 10 | 1.01-1.5 | 2.0-2.8 | 0.3 |
| 15 | 1.51-2.0 | 2.2-3.0 | 0.3 |
| 20 | 2.01-3.0 | 2.6-3.5 | 0.25 |
| 30 | 3.01-4.0 | 3.2-4.2 | 0.25 |
| 40 | 4.01-5.5 | 3.8-4.8 | 0.25 |
| 55 | 5.51-7.0 | 4.0-5.2 | 0.2 |
| 70 | 7.01-15.0 | 4.2-5.5 | 0.2 |
| 150 | >15.0 | 4.5-6.5 | 0.1 |
Packing:Â In iron drums with inside plastic bags of 100kg or 200kg net each.
Application:FW-1 used for tungsten carbide powder, large tungsten slab or other tungsten products;FW-2 used for tungsten alloys, high-density shielding materials.
Remarks：Any special requirement to the products can be discussed.
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