White fused alumina grit size for Surface Ra value

Sandblasting is a process in which abrasive particles are driven by the strong pressure of air to grind the surface of stainless steel. White fused alumina grit is an aggressive blasting media for stainless steel surfaces. It is of high hardness and grinding power. In the blasting process, each particle of white fused aluminum oxide grain is like an irregular cutter. When this granular “cutter” cuts stainless steel, the scratch marks different surface roughness.
The metal surface roughness is generally expressed by Ra. It is the result of the combined result of abrasive hardness, particle shape, and abrasive grit size. To achieve a specific surface roughness, the higher the hardness of the abrasive, the finer the grit size, and the larger the mesh size.
White fused alumina grit size for Surface Ra value is as follows: