| 7304.23.30 | 00 | Of iron or nonalloy steel | kg | Free | | 25% |
| 7304.23.60 | | Of alloy steel | | Free | | 35% |
| 7304.23.60 | 30 | Having a wall thickness not exceeding 9.5 mm | kg | | | |
| 7304.23.60 | 45 | Having a wall thickness exceeding 9.5 mm | kg | | | |
| 7304.23.60 | 60 | Having an outside diameter exceeding 168.3 mm | kg | | | |
| 7304.24.30 | | Threaded or coupled | | Free | | 28% |
| 7304.24.30 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.24.30 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.24.30 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.24.30 | 80 | Having an outside diameter exceeding 406.4 mm | kg | | | |
| 7304.24.40 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.24.40 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.24.40 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.24.40 | 80 | Having an outside diameter exceeding 406.4 mm | kg | | | |
| 7304.24.60 | 15 | Having a wall thickness not exceeding 9.5 mm | kg | | | |
| 7304.24.60 | 30 | Having a wall thickness exceeding 9.5 mm | kg | | | |
| 7304.24.60 | 45 | Having an outside diameter exceeding 114.3 mm but less than 215.9 mm | kg | | | |
| 7304.24.60 | 60 | Having an outside diameter of 215.9 mm or more but not exceeding 406.4 mm | kg | | | |
| 7304.24.60 | 75 | Having an outside diameter exceeding 406.4 mm | kg | | | |
| 7304.29.10 | | Threaded or coupled | | Free | | 20% |
| 7304.29.10 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.10 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.10 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.10 | 80 | Having an outside diameter exceed 406.4 mm | kg | | | |
| 7304.29.20 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
