Product description：On the base of white corundum increased by 22% chromium and smelted in electric arc, it appears amaranth. The hardness is little bit higher than adamantine spar, similar with corundum, the micro-hardness can reach 2200-2300Kg/mm2. The toughness is higher than corundum and little bit lower than adamantine spar.

Physical and chemical indicators: Implementation of standards（GB/T7986-2001）

Item	Unit	Value
AL2O3	%	98.5 Min
Cr2O3	%	0.2-0.45
Particle size	GB/T2481.1-1998	12#-220#
Particle density	g/cm3	3.90 Min
Magnetic content	%	0.004 Max