Typical Properties of selected Specialty Powders and Grains

Blasting
Aluminum Oxide
("Brown Fused")
White Fused Aluminum Oxide Black Silicon Carbide Glass Bead
Physical Form Blocky, solid, angular Blocky, solid, angular Blocky, solid, sharp Spherical, solid
Color Brown White Black Clear
Specific Gravity 3.98 3.96 3.20 --
Bulk Density 2.03 1.94 1.52 --
Hardness:
Knoop 100
2050 2000 2450 --
Typical Chemical Analysis Al2O3 - 96-97%
TiO2 - 2.75%
SiO2 - 0.61%
Fe2O3 - 0.54%
Al2O3 - 99.75%
SiO2 - 0.02%
Fe2O3 - 0.04%
Na2O - 0.2%
SiC - 97.80%
SiO2 - 1.26%
Si - 0.49%
Fe - 0.15%
Al - 0.10%
C - 0.20%
SiO2 - 71.03%
Al2O3 - 1.31%
Fe2O3 - 0.18%
BaO - 0.03%
CaO - 0.44%
MgO - 3.76%
Na2O - 16.52%
K2O - 0.39%
Available Grit Sizes and Powder Sizes 8-240
280-1200
8-240
280-1200
8-240
280-1200
Mil Sizes
3 to 13