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Fine Tungsten Powder
Grade | BET or F.s.s.s | Oxygen% max |
GW10 | 0.9-1.1 | 0.20% |
GW13 | 1.2-1.4 | 0.15% |
GW15 | 1.4-1.6 | 0.12 |
GW20 | 1.8-2.2 | 0.08 |
GW25 | 2.3-2.7 | 0.08 |
GW30 | 2.8-3.2 | 0.06 |
GW35 | 3.3-3.7 | 0.06 |
GW40 | 3.7-4.3 | 0.04 |
GW45 | 4.2-4.8 | 0.04 |
GW50 | 4.6-5.4 | 0.04 |
GW55 | 5.0-6.0 | 0.04 |
GW60 | 5.5-6.5 | 0.04 |
GW65 | 6.0-7.0 | 0.04 |
GW70 | 6.5-7.5 | 0.04 |
GW80 | 7.5-8.5 | 0.04 |
GW90 | 8.5-9.5 | 0.04 |
Trace elements for powder below 9.0u
Element | Max | Typical | Element | Max | Typical | Element | Max | Typical |
Al | 0.0010 | 0.0005 | Fe | 0.0050 | 0.0010 | Pb | 0.0003 | 0.0001 |
As | 0.0010 | 0.0005 | K | 0.0015 | 0.0010 | S | 0.0010 | 0.0005 |
Bi | 0.0003 | 0.0001 | Mg | 0.0010 | 0.0005 | Sb | 0.0005 | 0.0003 |
C | 0.0030 | 0.0010 | Mg | 0.0010 | 0.0005 | Si | 0.0015 | 0.0010 |
Ca | 0.0015 | 0.0006 | Mn | 0.0010 | 0.0005 | Sn | 0.0003 | 0.0001 |
Cd | 0.0005 | 0.0001 | Mo | 0.0030 | 0.0016 | Ti | 0.0010 | 0.0005 |
Co | 0.0010 | 0.0005 | Na | 0.0015 | 0.0007 | V | 0.0010 | 0.0005 |
Cr | 0.0020 | 0.0010 | Ni | 0.0020 | 0.0010 | ? | ? | ? |
Cu | 0.0003 | 0.0001 | P | 0.0010 | 0.0005 | ? | ? | ? |