Grinding should commence with the finest grit size that will establish an initially flat surface and remove the effects of sectioning within a few minutes. Abrasive disc grit sizes of 180/P180 to 240/P280 are coarse enough for use on samples sectioned by an abrasive wheel. All grinding steps should be performed wet, provided that water has no adverse effects on any constituents in the microstructure. Wet grinding minimizes specimen heating and washes away the swarf generated during grinding. Silicon carbide abrasive papers are one of the most commonly used grinding surfaces in the preparation of materials. Abrasive discs are available in various sizes and backings.