Media Blast Chart

 

Grainger Editorial Staff

Posted: 8/08/18

 
 
 

With some surfaces, a simple cleaning solution just won't do. Media blasting has a variety of uses, from removing a layer of paint to deodorizing a countertop to eliminating fire damage. With a high-pressured system and the right abrasive, this process can produce both a cleaning and finishing action for your surfaces. It's important to understand the different advantages and disadvantages of abrasive types. Check out our blast media chart to find the right one for the task at hand.

Media Type Description Best/Use Grit Size Range Hardness Shape Surface Profile Speed Recyclability
Aluminum oxide Extremely sharp and long-lasting, best used for etching and profiling Very coarse to extra fine 8-9 Mohs Angular High etch Fast High
Crushed glass grit Aggressive grit, best used for surface profiling and removal of coatings and surface contamination Coarse to extra fine 5-6 Mohs Angular Medium- high etch Fast None, consumable
Glass beads Lead-free, soda lime-type glass, containing no free silica best used to produce a smooth and bright finish Coarse to super fine 5-6 Mohs Round No etch, satin finish Medium-fast High
Garnet Industrial gemstone mineral best used for coating adhesion or where grit transfer is needed Very Coarse to Fine 7-8 Mohs Varies Virtually none Fast Medium
Silicone Carbide Hard, aggressive cutting media, best used on hard surfaces Very coarse to extra fine 9-9.5 Mohs Angular Very high etch Very fast High
Plastic Abrasive Soft media, best used for coatings and paint, ideal for automotive and aerospace applications Very coarse 3-4 Mohs Angular No etch, stripping Medium High
Pumice Light, natural mineral used as a mild abrasive where surface protection is necessary Super coarse to super fine 6-7 Mohs Various Low etch Medium-slow Low
Steel Shot Carbon steel best for polishing and smoothing surfaces Medium to ultra-fine 40-51 HRC Sphere No etch Medium Very high
Steel Grit Carbon steel best for aggressive cleaning and fast stripping Super coarse to medium 40-65 HRC Angular High etch Medium-fast Very high
Corn Cob Organic, soft media best used on soft surfaces like wood for non-damaging cleaning and stripping Extra Coarse to Extra Fine 4.5-5 Mohs Angular None Slow Low
Walnut Shell Organic, durable grit best used for mildly aggressive stripping without damage Extra Coarse to Extra Fine 4.5-5 Mohs Angular Low etch Medium-slow Low

Sources:

http://santo-abrasives.com/abrasive-grade-grit-size

http://www.kramerindustriesonline.com/finishing-guides/blasting-media-selection-guide.htm

http://www.randrmagonline.com/articles/86802-blast-it-breaking-down-the-types-of-media-blasting

Pub. 09/2017

The product statements contained herein are intended for informational purposes only. Such product statements do not constitute a product recommendation or representation as to the appropriateness for a specific application or use. W. W. Grainger, Inc. does not guarantee the result of product operation or assume any liability for personal injury or property damage resulting from the use of such products.

 
 

 

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