Black silicon carbide F70 for SiC abrasives
Black Silicon Carbide F70 is a high-grade synthetic abrasive produced by smelting silica sand and petroleum coke at high temperature. It features high hardness, sharp cutting edges, good thermal conductivity and chemical inertness. Black SiC grit for SiC abrasives is made from A grade SiC blocks and it’s get high purity, high density and low dust.
F70 grain size has uniform particle distribution and low impurity content. It works well for grinding, cutting, blasting and surface finishing of cast iron, non-ferrous metals, stone, glass and ceramic materials. It can also be used as raw material for abrasive tools, refractory materials and anti-slip surface treatment.
Typical physical properties of Black silicon carbide F70 for SiC abrasives
| Hardness: | Mohs:9.2 |
| Melting Point: | dissociated at about 2300 °C |
| Maximum service temperature: | 1900℃ |
| Specific Gravity: | 3.2-3.45 g/cm3 |
| Bulk density(LPD): | 1.4-1.7 g/cm3 |
| Color: | Black |
| Particle shape: | Hexagonal |
| Modulus of Elasticity | 58-65×106 psi |
| Coefficient of Thermal Expansion | 3.9-4.5 x10-6/ ℃ |
| Thermal Conductivity | 60-200 W/MK |
Typical physical properties of Black silicon carbide F70 for SiC abrasives
| Content | Guarantee value | Typical value |
| SiC | ≥98% | 98.62% |
| Fe2O3 | ≤0.2% | 0.18% |
| F.C | ≤0.2% | 0.12% |
| Magnetic content | ≤0.02% | 0.011% |
Product Feature of Black silicon carbide F70 for SiC abrasives
- High purity, the purity of black silicon carbide is min 98%.
- Good abrasive grain shape made from barmac milling.
- Superior oxidation resistance and chemical stability: when heated to 1000 ℃ in the air, silicon carbide only oxidizes on the surface, forming a layer of silicon dioxide film, which can protect silicon carbide material from oxidation. When heated to above 1627 ℃, the oxidation resistance of silicon carbide will decline rapidly.
- High hardness: Mohs hardness of black silicon carbide is 9.2-9.3, slightly lower than that of green silicon carbide.
- The toughness of black silicon carbide is higher than that of green silicon carbide.
- The packing density is high, and the black silicon carbide particles produced by the shaping process are more rounded.
- It has high cleanliness and is washed twice after crushing, reducing the dust in the abrasive.
Application of Black silicon carbide F70 for SiC abrasives:
- Silicon carbide fiber disc.
- Whetstone, abrasive brick, abrasive rob, abrasive segment, silicon carbide abrasive stones.
- Resin-bonded silicon carbide abrasive grinding wheels.
- Vitrified bonded silicon carbide abrasive mounted-point, cup wheel, bowl wheel, etc.
- Sanding wheel and sanding sheet for ceramic tiles and granite, etc.
- Silicon carbide abrasive brushes.
- Other bonded abrasive tools.
Available Grit Sizes:
| Macro Grit Size | Average particle size（mm） | Basic particle size（mm） |
| F008 | 2.460 | 2.000-2.360 |
| F010 | 2.085 | 1.700-2.000 |
| F012 | 1.765 | 1.400-1.700 |
| F014 | 1.470 | 1.180-1.400 |
| F016 | 1.230 | 1.100-1.180 |
| F020 | 1.040 | 0.850-1.000 |
| F022 | 0.885 | 0.710-0.850 |
| F024 | 0.745 | 0.600-0.710 |
| F030 | 0.625 | 0.500-0.600 |
| F036 | 0.525 | 0.425-0.500 |
| F040 | 0.438 | 0.355-0.425 |
| F046 | 0.370 | 0.300-0.355 |
| F054 | 0.310 | 0.250-0.300 |
| F060 | 0.260 | 0.212-0.250 |
| F070 | 0.218 | 0.180-0.212 |
| F080 | 0.185 | 0.150-0.180 |
| F090 | 0.154 | 0.125-0.150 |
| F100 | 0.129 | 0.106-0.125 |
| F120 | 0.109 | 0.090-0.106 |
| F150 | 0.082 | 0.063-0.075 |
| F180 | 0.069 | 0.053-0.075 |
| F220 | 0.058 | 0.045-0.063 |
The bulk density of Black Silicon carbide 53C:
| F Grit Size | Bulk Density(LPD) in g/cm3 |
| F12 | 1.40-1.50 |
| F14 | 1.42-1.55 |
| F16 | 1.45-1.56 |
| F20 | 1.46-1.58 |
| F22 | 1.48-1.59 |
| F24 | 1.50-1.61 |
| F30 | 1.52-1.62 |
| F36 | 1.54-1.63 |
| F40 | 1.58-1.68 |
| F46 | 1.57-1.66 |
| F54 | 1.56-1.65 |
| F60 | 1.54-1.64 |
| F70 | 1.54-1.63 |
| F80 | 1.53-1.63 |
| F90 | 1.52-1.62 |
| F100 | 1.52-1.60 |
| F120 | 1.50-1.60 |
| F150 | 1.48-1.57 |
| F180 | 1.45-1.55 |
| F220 | 1.42-1.52 |
Product Qualification of Black silicon carbide F70 for SiC abrasives
ISO 9001:2015 Certificate
TUV certificate
Production of Black Silicon carbide:
Packing of Black silicon carbide F70 for SiC abrasives :
- 25 kgs/PVC Bag with plastic inner bag.
- 1MT /Jumbo Bag.
- 1.35MT/Jumbo Bag.
- 25 kgs/PVC Bag,40Bags/Jumbo Bag
- 1 Metric Ton/Jumbo Bag/Pallet
- 25 kgs/paper bag,1MT/Pallet
- Other customized packages are available
FAQ：
Q: Are you silicon carbide manufacturer?
A: We are silicon carbide manufacturer in China since 1999.
Q: What grade of silicon carbide do you have?
A: Expect metallurgical black silicon carbide, the silicon carbide from us is all of A-grade quality.
Q: How will you check silicon carbide quality before delivery?
A: We will check the chemical content and cleanness of the SiC grain and powder. And inspect the gradation, and bulk density of SiC grain and powder.
Q: Do you support third-party quality tests?
A: Yes, we are open to getting a third-party quality test before delivery.
Q: Are the silicon carbide material from you is reclaimed material?
A: No. We only produce A-grade silicon carbide produced from high-quality melted SiC blocks.
Q: Is there any restriction to export silicon carbide from China?
A: Yes, it needs to provide an export license to Chinese customs. We could provide it and make customs clearance in China.
Q: Are free samples available?
A: Yes, we provide free samples within 1 kg. Customers only need to bear the logistic cost.
Q: What is the lead time for each order?
A: It depends on the quantity required. Generally 5-10 days for FCL(20-25MT).
Q: What is your annual capacity?
A: Our capacity is 1800-2000MT per month, annually appr. 22000 MT.
