| HTS Number | Description | Unit of Quantity | General Rate of Duty | Details | 
| 7306 4050.15 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn | kg |  | More | 
| 7306 4050.40 | Containing more than 0.5 percent but less than 24 percent by weight of nickel | kg |  | More | 
| 7306 4050.42 | Containing less than 15 percent by weight of chromium | kg |  | More | 
| 7306 4050.44 | Other | kg |  | More | 
| 7306 4050.62 | Containing more than 1.5 percent but less than 5 percent by weight of molybdenum | kg |  | More | 
| 7306 4050.64 | Other | kg |  | More | 
| 7306 4050.80 | Other | kg |  | More | 
| 7306 4050.85 | Containing more than 0.5 percent but less than 24 percent by weight of nickel | kg |  | More | 
| 7306 4050.90 | Other | kg |  | More | 
| 7306 50 | Other, welded, of circular cross section, of other alloy steel: |  |  |  | 
| 7306 5010.00 | Having a wall thickness of less than 1.65 mm | kg | Free | More | 
| 7306 5030.00 | Tapered pipes and tubes of steel principally used as parts of illuminating articles | kg | Free | More | 
| 7306 5050 | Other |  | Free |  | 
| 7306 5050.10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn | kg |  | More | 
| 7306 5050.30 | Other, cold-drawn or cold-rolled (cold- reduced) | kg |  | More | 
| 7306 5050.50 | With an outside diameter not exceeding 114.3 mm | kg |  | More | 
| 7306 5050.70 | With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm | kg |  | More | 
| 7306 61 | Of square or rectangular cross section: |  |  |  | 
| 7306 6110.00 | Of iron or nonalloy steel | kg | Free | More | 
| 7306 6130.00 | Of alloy steel | kg | Free | More |