| 7304.29.20 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.31 | | Threaded or coupled | | Free | | 28% |
| 7304.29.31 | 10 | Having an outside diameter less than 215.9 mm: | | | | |
| 7304.29.31 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.31 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.31 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.41 | 10 | Having an outside diameter less than 215.9 mm: | | | | |
| 7304.29.41 | 10 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.41 | 30 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.41 | 50 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.29.50 | 45 | Having an outside diameter exceeding 114.3 mm but less than 215.9 mm | kg | | | |
| 7304.29.61 | 45 | Having an outside diameter exceeding 114.3 mm but less than 215.9 mm | kg | | | |
| 7304.31 | | Cold-drawn or cold-rolled (cold-reduced): | | | | |
| 7304.31.60 | 10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters | kg | | | |
| 7304.39.00 | 02 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters: | | | | |
| 7304.39.00 | 02 | Having an outside diameter less than 38.1 mm | kg | | | |
| 7304.39.00 | 04 | Having an outside diameter of 38.1 mm or more but less than 190.5 mm | kg | | | |
| 7304.39.00 | 62 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.39.00 | 68 | Having a wall thickness of 12.7 mm or more but less than 19 mm | kg | | | |
| 7304.39.00 | 76 | Having a wall thickness less than 19 mm | kg | | | |
| 7304.39.00 | 20 | Having an outside diameter less than 38.1 mm | kg | | | |
| 7304.39.00 | 24 | Having a wall thickness less than 6.4 mm | kg | | | |
| 7304.39.00 | 36 | Having an outside diameter exceeding 114.3 mm but less than 190.5 mm: | | | | |
| 7304.39.00 | 48 | Having a wall thickness less than 12.7 mm | kg | | | |
| 7304.39.00 | 52 | Having a wall thickness of 12.7 mm or more but less than 19 mm | kg | | | |
