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Ultra-Fine Tungsten Powder
Grade | BET or F.s.s.s | Oxygen% max |
GW02 | >5.0㎡/g | 0.80 |
GW04 | 4.0-5.0㎡/g | 0.60% |
GW05 | 0.5-0.6μm | 0.55% |
GW06 | 0.6-0.7μm | 0.40 |
GW07 | 0.7-0.8μm | 0.35 |
GW08 | 0.8-0.9μm | 0.25 |
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 | ? | ? |