|
Coarse Tungsten Powder
Of the highest quality and purity, the specially prepared coarse tungsten powders produced at Buffalo Tungsten have average particle sizes greater than 10 microns. The coarse tungsten powders generally have a higher apparent density and better flow properties than the fine tungsten powders.
TYPICAL PHYSICAL PROPERTIES
|
TYPE
|
AVG. PARTICLE SIZE FSSS (microns)
|
APPARENT DENSITY(g/in3)
|
STANDARD SCREENING
|
|
C40
|
10.00-19.99
|
60 - 100
|
-100 Mesh
|
|
C60
|
20.00-39.99
|
70 - 120
|
-60 Mesh
|
|
C80
|
>40.00
|
90 - 130
|
-60 Mesh
|
|
TYPICAL TRACE ELEMENT CHEMICAL ANALYSIS
|
METALLIC IMPURITIES (WT%)
|
|
Element
|
Max
|
Typical
|
Element
|
Max
|
Typical
|
|
Al
|
0.003
|
<0.001
|
Mo
|
0.020
|
0.005
|
|
Co
|
0.005
|
<0.001
|
Na
|
0.010
|
0.005
|
|
Cr
|
0.020
|
0.005
|
Ni
|
0.020
|
0.005
|
|
Cu
|
0.005
|
<0.001
|
Si
|
0.002
|
<0.001
|
|
Fe
|
0.020
|
0.002
|
Sn
|
0.002
|
<0.001
|
|
NON-METALLIC IMPURITIES (WT%)
|
|
Type
|
Carbon
|
Oxygen (Loss on Reduction)
|
|
C40
|
<0.008
|
<0.070
|
|
C60
|
<0.008
|
<0.070
|
|
C80
|
<0.008
|
<0.070
|
|
TUNGSTEN (WT%) > 99.8% Excluding Gases
|
|
|
