Fine Tungsten Powder Properties

TYPICAL PHYSICAL PROPERTIES

TYPE AVG. PARTICLE SIZE FSSS (microns) APPARENT DENSITY1 (g/in3) STANDARD SCREENING2 C3 0.60-0.99 20 - 40 -100 Mesh C5 1.00-1.39 25 - 50 -100 Mesh C6 1.40-1.99 30 - 60 -100 Mesh C8 2.00-3.99 35 - 70 -200 Mesh C10 4.00-5.99 40 - 80 -200 Mesh C20 6.00-9.99 50 - 90 -200 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