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金剛砂
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Product yield：3000mt/year
producers：Jining Canal Emery Co.,Ltd.
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 |
