China GB/T 2480-1996 -- Silicon carbide -- Chemical composition -- For organic abrasives and sanding sheets.
| Code | Grit Size Range | Chemical Composition (%) | ||
| SiC (no less than) |
F·C (no more than) |
Fe2O3 (no more than) |
||
| C-B C-P |
12＃～90＃ P12～P100 |
98.00 | 0.25 | 0.70 |
| 100＃～150＃ P120～P150 |
97.50 | 0.35 | 0.90 | |
| 180＃～220＃ P180～P220 |
96.00 | 0.35 | 1.35 | |
| GC-B GC-P |
20＃～90＃ P12～P100 |
98.50 | 0.25 | 0.25 |
| 100＃～150＃ P120～P150 |
98.00 | 0.30 | 0.55 | |
| 180#～220＃ P180～P220 |
97.00 | 030 | 0.80 | |
| W63～W20 P240～P1000 |
96.50 | 0.35 | 0.80 | |
| W14～W10 P1200 |
94.50 | 0.45 | 0.80 | |
| W7～W5 | 93.00 | 0.60 | 0.80 | |
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