Red corundum, white corundum and brown corundum
Mainly from the point of view of hardness and toughness:
Toughness: Brown corundum > Red corundum; White corundum.
In addition to high hardness, white corundum will not be brought into the color when grinding, which is especially suitable for grinding some demanding metal products.
Brown corundum is the most common corundum series abrasive sand. Red corundum is somewhere in between.
Brown corundum: brown, high hardness, toughness, cheap price. Grinding carbon steel, alloy steel, malleable cast iron, hard bronze, etc.
White corundum: white, higher hardness than brown corundum, toughness is lower than brown corundum. Grinding quenched steel, high speed steel, high carbon steel, etc.
