| 2610.00.00 | 20 | Having a chromium content equivalent to not more than 40 percent chromic oxide (Cr2O3) | t Cr2O3 t | | | |
| 2610.00.00 | 40 | Having a chromium content equivalent to more than 40 percent but less than 46 percent chromic oxide (Cr2O3) | t Cr2O3 t | | | |
| 2610.00.00 | 60 | Having a chromium content equivalent to 46 percent or more chromic oxide (Cr2O3) | t Cr2O3 t | | | |
| 6902.10 | | Containing by weight, singly or together, more than 50 percent of the elements magnesium, calcium or chromium, expressed as MgO, CaO or Cr2O3: | | | | |
