Our silicon carbide abrasive grains are manufactured according to the standards as follows:
1. FEPA--for bonded abrasive tools F8-F2000
2. FEPA--for coated abrasive tools P12-P2500
3. JIS abrasive grain size: # 8--# 8000
| Physical Characteristics | |
| Item | Black Silicon Carbide |
| Basic mineral | ∝-SiC |
| Crystal color | Black |
| True Density | >3.12g/cm3 |
| Bulk density | 1.45-1.56g/cm3 |
| Mohs hardness | 9.15 |
| Knoop Hardness | 3100－3280kg/mm2 |
Chemical composition (%) (GB/T2480-1996)
| Grit | SiC | F.C. | Fe2O3 |
| F12~F90 | ≥ 98.50 | < 0.20 | ≤ 0.60 |
| F100~F150 | ≥ 98.00 | < 0.30 | ≤ 0.80 |
| F180~F220 | ≥ 97.00 | < 0.30 | ≤ 1.20 |
| F230~F400 | ≥ 96.00 | < 0.40 | ≤ 1.20 |
| F500~F800 | ≥ 95.00 | < 0.40 | ≤ 1.20 |
| F1000~F1200 | ≥ 93.00 | < 0.50 | ≤ 1.20 |
| P12~P90 | ≥ 98.50 | < 0.20 | ≤ 0.60 |
| P100~P150 | ≥ 98.00 | < 0.30 | ≤ 0.80 |
| P180~P220 | ≥ 97.00 | < 0.36 | ≤ 1.20 |
| P230~P500 | ≥ 96.00 | < 0.40 | ≤ 1.20 |
| P600~P1500 | ≥ 95.00 | < 0.40 | ≤ 1.20 |
| P2000~P2500 | ≥ 93.00 | < 0.50 | ≤ 1.20 |
Note: Special requirements on chemical composition can be satisfied through discussion.