HTS heading 8406 · Chapter 84
HTS 8406: Steam turbines and other vapor turbines, and parts…
HTS heading 8406 covers steam turbines and other vapor turbines, and parts thereof. It has 14 tariff lines with a duty rate; the general (MFN) rates are Free (7 lines), 5% (4 lines), 6.7% (3 lines).
Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.
Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.
Tariff lines and duty rates
| HTS code | Description | General | Special | Column 2 | Estimate |
|---|---|---|---|---|---|
| 8406.10 | Turbines for marine propulsion: | ||||
| 8406.10.10.00 | Steam turbines[No.] | 6.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | Estimate → |
| 8406.10.90.00 | Other[No.] | Free | 27.5% | Estimate → | |
| Other turbines: | |||||
| 8406.81 | Of an output exceeding 40 MW: | ||||
| 8406.81.10 | Steam turbines | 6.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 3.35% (JP) | 20% | |
| 8406.81.10.20 | Stationary steam turbines, condensing type[No.] | Estimate → | |||
| 8406.81.10.70 | Other[No.] | Estimate → | |||
| 8406.81.90.00 | Other[No.] | Free | 27.5% | Estimate → | |
| 8406.82 | Of an output not exceeding 40 MW: | ||||
| 8406.82.10 | Steam turbines | 6.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | |
| Stationary steam turbines, condensing type: | |||||
| 8406.82.10.10 | Not exceeding 7,460 kW[No.] | Estimate → | |||
| 8406.82.10.20 | Exceeding 7,460 kW[No.] | Estimate → | |||
| Other: | |||||
| 8406.82.10.50 | Not exceeding 7,460 kW[No.] | Estimate → | |||
| 8406.82.10.70 | Exceeding 7,460 kW[No.] | Estimate → | |||
| 8406.82.90.00 | Other[No.] | Free | 27.5% | Estimate → | |
| 8406.90 | Parts: | ||||
| Of steam turbines: | |||||
| 8406.90.20.00 | Rotors, finished for final assembly[No.] | 5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | Estimate → |
| 8406.90.30.00 | Rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery[No.] | 5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG) | 20% | Estimate → |
| 8406.90.40.00 | Blades, rotating or stationary[No.] | 5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG) | 20% | Estimate → |
| 8406.90.45 | Other | 5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG) | 20% | |
| 8406.90.45.40 | Rotors or spindles and rotor or spindle assemblies[No.] | Estimate → | |||
| 8406.90.45.80 | Other[kg] | Estimate → | |||
| Other: | |||||
| 8406.90.50.00 | Rotors, finished for final assembly[No.] | Free | 27.5% | Estimate → | |
| 8406.90.60.00 | Rotors, not further advanced than cleaned or machined for removal of fins, gates, sprues, and risers, or to permit location in finishing machinery[No.] | Free | 27.5% | Estimate → | |
| 8406.90.70.00 | Blades, rotating or stationary[No.] | Free | 27.5% | Estimate → | |
| 8406.90.75.00 | Other[kg] | Free | 27.5% | Estimate → |
22 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.
Example: base duty and fees on $10000
For HTS 8406.10.10.00 at the general rate of 6.7%, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (6.7%) | $670.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $717.14 |
Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.
Special program codes in this heading
- A, A*, A+
- Generalized System of Preferences (GSP)
- AU
- U.S.–Australia FTA
- BH
- U.S.–Bahrain FTA
- CL
- U.S.–Chile FTA
- CO
- U.S.–Colombia Trade Promotion Agreement
- D
- African Growth and Opportunity Act (AGOA)
- E, E*
- Caribbean Basin Economic Recovery Act
- IL
- U.S.–Israel FTA
- JO
- U.S.–Jordan FTA
- JP
- U.S.–Japan Trade Agreement
- KR
- U.S.–Korea FTA (KORUS)
- MA
- U.S.–Morocco FTA
- OM
- U.S.–Oman FTA
- P, P+
- CAFTA-DR
- PA
- U.S.–Panama Trade Promotion Agreement
- PE
- U.S.–Peru Trade Promotion Agreement
- S, S+
- USMCA (United States–Mexico–Canada Agreement)
- SG
- U.S.–Singapore FTA
A special rate applies only when the goods qualify under that program's rules of origin and the claim is made at entry.
Frequently asked questions
What is the duty rate for HTS 8406?
Heading 8406 has 14 rate lines. The general (MFN) duty rates are Free (7 lines), 5% (4 lines), 6.7% (3 lines). Products of free trade agreement partners may enter at the special rate, and Column 2 rates apply to countries without normal trade relations. Chapter 99 tariffs can be added on top: calculate the full amount.
Do Section 301, 232 or 201 tariffs apply to HTS 8406?
It depends on the 8- or 10-digit subheading, the country of origin, the entry date and, for Section 232, the metal content. These additional duties are listed in Chapter 99 of the HTS. The free duty calculator checks each program for a given code, origin and date and shows which apply and why.
What fees are added to an import under HTS 8406?
Formal entries pay the Merchandise Processing Fee of 0.3464% of value (minimum $34.58, maximum $670.86 in FY2027). Ocean shipments also pay the Harbor Maintenance Fee of 0.125% of value. See the import duty calculator for how they combine.