| 7304.59.20 | 60 | Having an outside diameter of 190.5 mm or more but not exceeding 285.8 mm | kg | | | |
| 7304.59.20 | 70 | Having an outside diameter exceeding 285.8 mm but not exceeding 406.4 mm | kg | | | |
| 7304.59.20 | 80 | Having an outside diameter exceeding 406.4 mm | kg | | | |
| 7304.59.60 | 00 | Of heat-resisting steel | kg | Free | | 36% |
| 7304.59.80 | 65 | Having a wall thickness of 12.7 mm or more but less than 19 mm | kg | | | |
| 7304.59.80 | 80 | Having an outside diameter exceeding 406.4 mm | kg | | | |
| 7304.59.80 | 35 | Having a wall thickness of 12.7 mm or more but less than 19 mm | kg | | | |
| 7304.59.80 | 10 | Having an outside diameter less than 38.1 mm | kg | | | |
| 7304.59.80 | 15 | Having a wall thickness less than 6.4 mm | kg | | | |
| 7304.59.80 | 20 | Having a wall thickness of 6.4 mm or more but not exceeding 12.7 mm | kg | | | |
| 7304.59.80 | 25 | Having a wall thickness exceeding 12.7 mm | kg | | | |
| 7304.59.80 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.59.80 | 45 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.59.80 | 50 | Having a wall thickness of 12.7 mm or more but less than 19 mm | kg | | | |
| 7304.59.80 | 60 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.90.10 | 00 | Of iron or nonalloy steel | kg | Free | | 1% |
| 7304.90.30 | 00 | Of alloy steel | kg | Free | | 8.5% |
| 7304.90.50 | 00 | Of iron or nonalloy steel | kg | Free | | 25% |
| 7304.90.70 | 00 | Of alloy steel | kg | Free | | 35% |
| 7305.11.10 | | Of iron or nonalloy steel | | Free | | 5.5% |
| 7305.11.10 | 30 | With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm | kg | | | |
| 7305.11.10 | 60 | With an external diameter exceeding 609.6 mm | kg | | | |
| 7305.11.50 | 00 | Of alloy steel | kg | Free | | 10% |
| 7305.12.10 | | Of iron or nonalloy steel | | Free | | 5.5% |
| 7305.12.10 | 30 | With an external diameter exceeding 406.4 mm but not exceeding 609.6 mm | kg | | | |
