| 2603.00.00 | 20 | Lead content | Pb kg | | | |
| 2603.00.00 | 30 | Zinc content | Zn kg | | | |
| 2603.00.00 | 40 | Silver content | Ag g | | | |
| 2603.00.00 | 50 | Gold content | Au g | | | |
| 2604.00.00 | | Nickel ores and concentrates | | Free | | Free |
| 2604.00.00 | 40 | Nickel content | Ni kg | | | |
| 2604.00.00 | 80 | Other metal content | kg | | | |
| 2605.00.00 | 00 | Cobalt ores and concentrates | kg Co kg | Free | | Free |
| 2606.00.00 | | Aluminum ores and concentrates | | Free | | $1/t |
| 2607.00.00 | | Lead ores and concentrates | | 1.1¢/kg on lead content | Free (A*,AU,BH, CA,CL,E,IL,J,JO, MA,MX, P,SG) | 8.8¢/kg on copper content + 3.3¢/kg on lead content + 3.7¢/kg on zinc content |
| 2607.00.00 | 10 | Copper content | Cu kg | | | |
| 2607.00.00 | 20 | Lead content | Pb kg | | | |
| 2607.00.00 | 30 | Zinc content | Zn kg | | | |
| 2607.00.00 | 40 | Silver content | Ag g | | | |
| 2607.00.00 | 50 | Gold content | Au g | | | |
| 2608.00.00 | | Zinc ores and concentrates | | Free | | 8.8¢/kg on copper content + 3.3¢/kg on lead content + 3.7¢/kg on zinc content |
| 2608.00.00 | 10 | Copper content | Cu kg | | | |
| 2608.00.00 | 20 | Lead content | Pb kg | | | |
| 2608.00.00 | 30 | Zinc content | Zn kg | | | |
| 2608.00.00 | 40 | Silver content | Ag g | | | |
| 2608.00.00 | 50 | Gold content | Au g | | | |
| 2609.00.00 | 00 | Tin ores and concentrates | t Sn t | Free | | Free |
| 2610.00.00 | | Chromium ores and concentrates | | Free | | Free |
| 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 | | | |
Harmonized Tariff Schedule of the United States inquiry: 3920590000
