Description
Brown Fused Alumina Abrasive Grain BFA Aluminium Oxide for Different Applications
Brown fused alumina (A) is produced by fusion of bauxite in an electric arc furnace at high temperatures. The brownish coloured product shows high hardness as well as extreme toughness. The materials are used to grind metals of high-tensile strength such as steel, annealed malleable iron and hard bronze. It can also be used as high-class refractory. | Grain Usages and Types |
| Usage | For vitrified wheels | For organic wheels | For coated abrasives | For refractory materials |
| Type | A | A-B | A-P | A-R |
| Physical Characteristics |
| Item | Basic mineral | Crystal system | Crystal color | Mohs
hardness | Density |
| Brown aluminium oxide | α- Al2O3 | Hexagonal | Brown | 9 | ≥3.90g/cm3 |
| Item | Micro hardness | Electrical
resistivity | Grinding ability(compared with
diamond as one) | Linear expansion
coefficient(when 900ºC α•10-6k-1) |
| Brown aluminium oxide | HV1800-2200 | 1014-1016Ω•cm | 0.10 | 7.6 |
| Chemical Composition |
| GB/T 2478-2008 |
| Type | Grit | Chemical Composition(%, by weight) |
| Al2O3 | TiO2 | CaO | SiO2 | Fe2O3 |
| A | F4-F80 | 95.00-97.50 | 1.70-3.40 | ≤0.42 | ≤1.00 | ≤0.30 |
| F90-F150 | 94.50-97.00 |
| F180-F220 | 94.00-97.00 | 1.70-3.60 | ≤0.45 | ≤1.00 | ≤0.30 |
| F230-F800 | ≥93.50 | 1.70-3.80 | ≤0.45 | ≤1.20 | ≤0.30 |
| F1000-F1200 | ≥93.00 | ≤4.00 | ≤0.50 | ≤1.40 | ≤0.30 |
| A-B | F4-F80 | ≥94.00 | 1.50-3.80 | ≤0.45 | ≤1.20 | ≤0.30 |
| F90-F220 | ≥93.00 | 1.50-4.00 | ≤0.50 | ≤1.40 | ≤0.30 |
| F230-F800 | ≥92.5 | ≤4.20 | ≤0.60 | ≤1.60 | ≤0.30 |
| F1000-F1200 | ≥92.00 | ≤4.20 | ≤0.60 | ≤1.80 | ≤0.30 |
| A-P | P12-P80 | 95.00-97.50 | 1.70-3.40 | ≤0.42 | ≤1.00 | ≤0.30 |
| P100-P150 | 94.50-97.00 |
| P180-P220 | 94.00-97.00 | 1.70-3.60 | ≤0.45 | ≤1.00 | ≤0.30 |
| P240-P800 | ≥93.50 | 1.70-3.80 | ≤0.45 | ≤1.20 | ≤0.30 |
| P1000-P1200 | ≥93.00 | ≤4.00 | ≤0.50 | ≤1.40 | ≤0.30 |
| P1500-P2500 | ≥92.50 | ≤4.20 | ≤0.55 | ≤1.60 | ≤0.30 |
| A-R | 0-1mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 |
| 1-3mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 |
| 3-5mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 |
| 5-8mm | 94.00-97.50 | 1.50-3.80 | ≤0.45 | ≤1.40 | ≤0.30 |
Note: Special requirement on chemical composition can be satisfied through discussion. | Guarnteed bulk density range of coarse grains(A / A-B, g/cm3) |
| Grit | Grade |
| Roll Crushing | Ball Mill | BMK |
| F12 | 1.84±0.05 | 1.92±0.05 | 2.00±0.05 |
| F14 | 1.83±0.05 | 1.91±0.05 | 1.99±0.05 |
| F16 | 1.81±0.05 | 1.90±0.05 | 1.98±0.05 |
| F20 | 1.78±0.05 | 1.87±0.05 | 1.98±0.05 |
| F22 | 1.76±0.05 | 1.85±0.05 | 1.96±0.05 |
| F24 | 1.74±0.05 | 1.84±0.05 | 1.94±0.05 |
| F30 | 1.72±0.05 | 1.81±0.05 | 1.90±0.05 |
| F36 | 1.70±0.05 | 1.79±0.05 | 1.87±0.05 |
| F40 | 1.68±0.05 | 1.76±0.05 | 1.85±0.05 |
| F46 | 1.65±0.05 | 1.75±0.05 | 1.83±0.05 |
| F54 | 1.63±0.05 | 1.73±0.05 | 1.81±0.05 |
| F60 | 1.62±0.05 | 1.72±0.05 | 1.79±0.05 |
| F70 | 1.60±0.05 | 1.69±0.05 | 1.78±0.05 |
| F80 | 1.57±0.05 | 1.65±0.05 | 1.76±0.05 |
| F90 | 1.54±0.05 | 1.64±0.05 | 1.74±0.05 |
| F100 | 1.51±0.05 | 1.60±0.05 | 1.70±0.05 |
| F120 | 1.49±0.05 | 1.59±0.05 | 1.68±0.05 |
| F150 | 1.47±0.05 | 1.57±0.05 | 1.65±0.05 |
| F180 | 1.45±0.05 | 1.56±0.05 | 1.61±0.05 |
| F220 | 1.43±0.05 | 1.53±0.05 | 1.59±0.05 |
Note: Special requirement on bulk density can be satisfied through discussion. | Guarnteed bulk density range of coarse grains(A-P, g/cm3) |
| Grit | Grade |
| Roll Crushing | Ball Mill | BMK |
| P12 | 1.80±0.05 | 1.88±0.05 | 1.96±0.05 |
| P16 | 1.78±0.05 | 1.85±0.05 | 1.94±0.05 |
| P20 | 1.76±0.05 | 1.83±0.05 | 1.93±0.05 |
| P24 | 1.73±0.05 | 1.81±0.05 | 1.92±0.05 |
| P30 | 1.70±0.05 | 1.79±0.05 | 1.90±0.05 |
| P36 | 1.68±0.05 | 1.76±0.05 | 1.88±0.05 |
| P40 | 1.65±0.05 | 1.73±0.05 | 1.86±0.05 |
| P50 | 1.62±0.05 | 1.71±0.05 | 1.83±0.05 |
| P60 | 1.59±0.05 | 1.67±0.05 | 1.81±0.05 |
| P80 | 1.57±0.05 | 1.64±0.05 | 1.77±0.05 |
| P100 | 1.55±0.05 | 1.62±0.05 | 1.73±0.05 |
| P120 | 1.52±0.05 | 1.59±0.05 | 1.70±0.05 |
| P150 | 1.49±0.05 | 1.55±0.05 | 1.66±0.05 |
| P180 | 1.47±0.05 | 1.52±0.05 | 1.62±0.05 |
| P220 | 1.45±0.05 | 1.50±0.05 | 1.58±0.05 |
Note: Special requirement on bulk density can be satisfied through discussion.Packaging & Shipping of BFA:1. 25KG P.P BAG+ 1MT JUMBO BAG
2. 25KG P.P BAG+ 1MT PALLET
3. 25KG PAPER BAG+ 1MT PALLET
4. According to customers' requirements
5. Free samples or Sample orders usually shipped by Express like FedEx/TNT...
Our Advantages: 1.With many years of export experiences and well-deserved reputation, we provide clients with stable product quality and professional technical advice.
2.OEM, ODM services and our own brand (KUMTHAI) can be provided according to customers' requirements.
3. Management System Certification: ISO 9001, ISO 9000, ISO 14001, ISO 14000
4. Products with different grades and sizes can meet different market users' demand for different product quality and prices.
5. We guarantee that our products are good quality with competitive prices, and delivery in time.
6. Technical research and development strength: The company's employees have the relevant discipline background of abrasive grains and superhard materials, and know more about abrasives and grinding. They would like to provide better services for customers to meet their different needs. What's more, the company invites senior research experts from Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd. and Henan University of Technology as product consultants, which can help to achieve in-depth product technical cooperation with customers and better matching demands, combined with China's industrial advantages.
Our Services: 1. Your inquiries will be replied in 24 working hours;
2. Free samples offered in certain quantity and delivered within 10 days;
3. PL, INV, MSDS and C.O. or other information you need can be provided at the top speed;
4. Any questions about products and technology will be answered sincerely and professionally.
5. Related products sourcing services.
FAQ: Q1: Can you offer free samples?
A: Yes, free samples can be offered in certain quantity, but big samples and special products with charge.
Q2: Can I have a sample order for your products?
A: Yes, we welcome sample orders to test and check the quality.
Q3: What is your delivery time?
A: Sample order: Usually within 7 working days
Mass order: Within 25 days after 30% deposit received for conventional products. Negotiation for special products.
Q4: What is your payment terms?
A: T/T, D/P, L/C and so on.
Q5: Do you offer customized products according to customer's requirements?
A: Yes, OEM, ODM services and our own brand (KUMTHAI) are provided according to customers' requirements.
Q6: Are all your products on the website?
A: Not all the products on the websites. For some related products or the sizes that are not included on the website, please make an inquiry separately to our emails or any social media.
Related Abrasive Products: White Fused Alumina
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