Analysis
HTS 8406.10.90 covers turbines for marine propulsion: other under heading 8406 (steam turbines and other vapor turbines, and parts thereof).
Rates on the nearby lines range from duty-free to 6.7%. The costliest confusion would be with 8406.82.10 (of an output not exceeding 40 MW: steam turbines) at 6.7%, a difference of 6.7 points on the customs value.
There is no general-rate duty on this line, which puts it with roughly 61% of the 823 tariff lines in chapter 84 that are also free. Chapter 99 measures such as Section 301 or 232 can still apply on top, depending on where the goods come from.
Goods from countries without normal trade relations pay the column 2 rate of 27.5% instead of nothing, so origin decides between free entry and a 27.5% duty.
Census statistics map these goods to NAICS 333611 (Turbine and Turbine Generator Set Units Manufacturing), an industry of 199 US establishments employing 25,748 people, the industry a domestic producer of these goods reports under.
Every edition we compared, from Jan 2023 to Oct 2026 (Rev. 22), shows the same general rate of Free.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 8406.10.10 | Turbines for marine propulsion: steam turbines | 6.7% |
| 8406.81.10 | Of an output exceeding 40 MW: steam turbines | 6.7% |
| 8406.81.90 | Of an output exceeding 40 MW: other | Free |
| 8406.82.10 | Of an output not exceeding 40 MW: steam turbines | 6.7% |
| 8406.82.90 | Of an output not exceeding 40 MW: other | Free |
| 8406.90.20 | Rotors, finished for final assembly | 5% |
| 8406.90.30 | Rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery | 5% |
| 8406.90.40 | Blades, rotating or stationary | 5% |
| 8406.90.45 | Of steam turbines: other | 5% |
| 8406.90.50 | Rotors, finished for final assembly | Free |
| 8406.90.60 | Rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery | Free |
| 8406.90.70 | Blades, rotating or stationary | Free |
| 8406.90.75 | Other: other | Free |