Abrasive Comparison

 

Abrasives: GLASS BEADS COARSE ABRASIVES
(e.g. sand)
METALLIC ABRASIVES
(e.g. steel and iron shot/grit)
FINE ANGULAR ABRASIVES
(e.g. aluminum oxide)
ORGANIC ABRASIVES
(e.g. walnut shell)
Applications: - Cleaning
- Finishing
- Peening - light to medium
- Deburring
General Cleaning where metal removal and surface contamination are not considered. Rough general cleaning and high intensity peening. Cleaning where smooth finish and surface contamination are not important Light deburring and cleaning of fragile items.
Physical Properties:
Shape
Color
Specific Gravity
Free silica content
Free Iron content
Hardness (MOH)

Spherical
Clear
2.45-2.50
none
<1%
5.5

Granular
Tan
2.4-2.7
100%
<1%
7.5

Spherical/Irregular
Grey
7.6-7.8
none
95%-100%
7.5

Angular
Brown/White
2.4-4.0
<1%
<1%
9.0

Irregular
Brown/Tan
1.3-1.4
none
none
1.0
Media Comparison:
Toxicity
Metal Removal
Cleaning Speed
Peening Ability
Finish Achieved
 
None
Low/None
Medium/High
High
Various matte
 
High
High
High
None
Rough anchor

None
High/Medium
Medium/High
High
Rough Anchor

Low
High
High
None
Various matte

Low/none
None
Low
None
Smooth
Surface Contamination
Suitability for Wet Blast
Suitability for Dry Blast
Standard Size Ranges
Consumption Rate
None
High
High
20-325 U.S. Mesh
Low
Medium
Low
High
8-200 U.S. Mesh
High
High/Medium
Low
High
6-80 U.S. Mesh
Low
Medium
Low
High
80-325 U.S. Mesh
Medium
Medium/High
Low
High
60-325 U.S. Mesh
High
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