Black Corundum HS Code 2818109000, CAS No.1302-74-5, is also known as low aluminum corundum, black fused alumina, black aluminum oxide, and black fused corundum. It is also a new type product of polishing material, and it is a dark gray crystal body made α-Al2O3 and ferropicotite as main ore in the electric arc furnace by smelting the bauxite. Black Corundum is characterized by low Al2O3 and a certain amount of Fe2O3 (10% more or less) content, so it has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. It is mainly suitable for free grinding, such as coarse grinding before electroplating products, mainly for polishing and sandblasting of stainless steel, fabricated metal products, optical glass, bamboo products, and it is also new abrasive for manufacturing resin grinding wheel, cut-off wheels and emery cloth. The black corundum of RunLong Enterprise concentrated basic tablets, with the characteristics of strong cutting power, high toughness, high flexibility, good abrasion resistance and high working efficiency, which is the best product for grinding and polishing, sandblasting stainless steel products.
Black Corundum F60 Grit Basic Indicators:
| Molecular Formula | Al2O3 |
| Appearance | Black Powder |
| CAS No. | 1302-74-5 |
| HS Code | 28181090 |
Black Corundum F60 Grit Chemical Composition:
| Aluminum Oxide(Al2O3) | 77.0%min |
| Iron Oxide(Fe2O3) | 5.0%min |
| Titanium Oxide(TiO2) | 1.5-3.5% |
| Silicon Oxide(SiO2) | 11.0%min |
Black Corundum F60 Grit Physical Properties:
| Item | Indicators |
| Color | Black |
| Crystal | Trigonal system |
| Hardness (Mohs) | ≥ 9.0 |
| Melting point (°C) | 2050 |
| The maximum temperature (°C) | 1850 |
| True Density (g/cm3) | ≥ 3. 50 |
| Linear expansion coefficient (0-1600 °C) | 7-9 |
Black Corundum F60 Grit Particle Size Distribution(PSD)
| F060 | +425um | 0 | +300um | ≤30% | +250um | ≥40% | 250+212um | ≥65% | -180um | ≤3% |
All data based upon RunLong Enterprise’s standard test methods. We could supply grit size according to FEPA, JIS, ANSI, GB & P Standard.
Recommendations By Seller:
Product Specification / Models
For Refractory
0-0.1mm 0-0.2mm 0-0.5mm 0-1mm 0.5-1mm 1-3mm 3-5mm 5-8mm 100mesh 200mesh 325mesh
Other specs are available upon request.
For Bonded & Coated Abrasives
Bonded abrasives: F24 F30 F36 F40 F46 F54 F60 F80 F100 F120 F150 F180 F220 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200
Coated abrasives: P24 P30 P36 P40 P50 P60 P80 P100 P120 P150 P180 P220 P240 P280 P320 P360 P400 P500 P600 P800 P1000 P1200 P1500 P2000 P2500 P3000
Other specs are available upon request.
For Sandblasting & Grinding
F24 F30 F36 F40 F46 F54 F60 F80 F100 F120 F150 F180 F220 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200
Other specs are available upon request.
Sandblasting size: 46, 60, 80mesh(Big size could recycle more times. Or according to the customer’s request.
For further technical data sheet, please do not hesitate to contact us.
Black Corundum Application Area:
● For free grinding, such as glass industry
● For non-slip of airport and road, chemical factory board paving
● For produce ceramic grinding wheel, resinoid grinding wheel, grinding stone,
● For free grinding, such as coarse grinding before electroplating products.
● For polishing and sandblasting of stainless steel, fabricated metal products.
● For investment casting technics of stainless steel and aluminum casting in coating.
● For sand paper, sand cloth, sand belt, Polish wax, abrasive paste, coating etc…
● For abrasion and high temperature resistant in steel metallurgy, various industrial stoves
● For various material workpieces to decontaminate, prevent corrosion, remove oxide skin.
Packing and storage
Packing: Double coated plastic woven / paper bag, net weight 25kg.
Big bag packing, net weight 1000kg / 1250kg per clients’ request.
Storage: Dry, ventilated, moisture proof.
Delivery
1. The sample will be send by International expresses FEDEX/DHL/UPS/TNT.
2. Full container Load(FCL): By vessel Or International Railway Transportation
3. Less Than Container Load(LCL): By vessel or By air
Payment
1. Payment: T/T, Western Union, LC, Paypal.
2. MOQ: Usually 1Tons
3. Quality Warranty: 1 years
After Sales Service:
1).We are very glad that customer give us some suggestion for price and products.
2).If any question, please let us know it by E-mail or Telephone at the first time. We can deal with them for you in time.
