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"Grit blasted finishes on 300 series stainless steel"





April 22, 2010

I'm looking to blast a finish of between 30 and 50 microns on stainless steel 300 series. What grit size would be recommended to produce this finish.

Tom Murphy
- East Amherst, NY
^


April 26, 2010

This is a guess. 24.
The angle of the gun, the gun to part distance, siphon or pressure system and air pressure will also have large effects.

An approximation is that the grit size becomes half as large for each time it is recycled thru the system. A carbide grit will last longer than aluminum oxide - white , which will last longer than brown and all will last longer than sand.

Remember that you have special requirements from OSHA if you use a silicon product.

James Watts
- Navarre, Florida
^


April 28, 2010

Hi Tom,

I would recommend a stainless cut wire shot to achieve the profile. This media would not contaminate the 300 stainless steel surface either. The surface of the component(s) can be blasted to meet profile depending on the size, quantity and type of blasting system. The size of media to use would need to be selected by first testing and evaluating the profile with some sample lots of media.

Tim Deakin
North Tonawanda, New York
^

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