Abrasive blast medias
Silicon carbide medias are of a hardness on MOH’s scale 9

It should be noted that any abrasive described as 6 and over on the MOH scale is classed as abrasive

Silicon carbide blast media

Silicon carbide grit is the hardest blasting media available. High-quality silicon carbide media is a manufactured abrasive and has sharp edges for blasting.  Silicon carbide has a very fast cutting speed and can be recycled and reused many times.  The hardness of silicon carbide allows for much shorter blast times relative to softer blast media.

Its melting point is 1,410°C (2,570°F) and its density is 2.33 grams per cubic centimeter. Silicon has a hardness of about 9 on the Mohs scale.

Applications

Silicon carbide grit is the ideal media for use in both suction or venturie and direct pressure fed blast systems.  Can be recycled multiple times resulting in a cost-effective silicon carbide grit blast media.

Since silicon carbide grit is harder than aluminum oxide, it can be used efficiently for more precise applications.

• Silicon carbide grit blast media has no free silica
• It does not generate static electricity
• Also manufactured to contain minimal magnetic content

Components can be blast-tumbled or individually blasted with silicon carbide when aggressive deburring, scale removal and edge breaking on harder substrates is required. Silicon carbide deburring grit will resist fracturing, allowing for extended tumbling cycles or multi-batch uses with excellent results.

The more commonly used medias are:

• aluminium oxide
• white aluminium oxide
• urea and other plastic abrasives
• corn cob grit
• walnut shell grit
• glass beads
• pumice
• crushed glass grit
• steel grit
• steel shot
• chilled iron grit

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Post written by
Haydn Kitchen
Shot Blasting Technical Manager