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RELATIONSHIP BETWEEN Sa value and micron finish of surface

Is there any relationship between Sa values and Micron finish of surfaces after sand/shot blasting.
Also, let us know is there any measuring instrument available to measure such surface finish with conversion.

your reply shall be appreciated.

regards,
Joshi

Ratnakar D. Joshi
consultant to engineering industries - Mumbai, Maharashtra state, India
March 17, 2009

Hi, Ratnakar. I don't think any such conversion is possible. "Sa" is a Swedish Institute for Standards designation for blasted finishes -- approximately equivalent to SSPC, NACE, and ISO 8501 standards.

Please see letter 12526 for a more complete explanation.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
September 3, 2009

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