~It has brown colour, high hardness and great toughness.
Application:
It is used for making bonded and coated abrasive such as grinding wheels, cutting discs, abrasive cloth etc. The abrasives tools made of brown aluminum oxide are suitable for steel, malleable cast iron and hard bronze.
Brown corundum grit and powder

~FEPA grade
F14,F16,F20,F22,F24,F30,F36,F40,F46,F60,F70,F80,F100,F120,F150,F180,F220,F240,F280,F320
F360,F400,F500,F600,F800,F1000,F1200
P46-P2500
JIS Grade
#4,#5,#6,#8,#10,#12,#14,#16,#20,#22,#24,#30,#36,#40,#46,#60,#70,#80,#100,#120,#150,#180,
#220,#240,#280,#320,#360,#400,#500,#600,#800,#1000,#1200,#1500,#2000,#2500,#3000,#4000,#6000,#8000