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HSChapter 84
U.S. imports of parts for steam and other vapor turbines (HS 840690) totaled $11.1M in April 2026, traded with 28 countries.
Importers of Parts for Steam and Other Vapor Turbines paid $2.3M in duties in April 2026 — an effective duty rate of 22% on $10.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Parts for Steam and Other Vapor Turbines imports of $11.1M in April 2026 ran 44% below the year-to-date monthly average of $19.9M.
Last updated: April 2026 dataGermany and Japan dominate US imports of steam and vapor turbine parts, reflecting the global OEM footprint of major turbine manufacturers headquartered in those countries. The US tariff schedule is unusually granular here, with separate lines for finished rotors ready for final assembly (8406902000), rotors not further advanced than permitted for finish machining (8406903000), rotating and stationary blades (8406904000), rotor and spindle assemblies (8406904540), and residual steam turbine parts (8406904580), plus parallel lines for vapor turbine components. Blade and rotor classification is a frequent audit focus because these high-value forgings can be misclassified as general industrial castings if not properly documented.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A rotor classified under 8406902000 has completed all machining operations and is ready to be installed into a turbine with no further material removal. A rotor under 8406903000 is a rough or semi-finished forging or casting that still requires precision machining before assembly. The distinction matters because the two lines may carry different duty rates, and CBP may request machining records or OEM acceptance test certificates to confirm the stage of manufacture.
Each article in a mixed shipment must be classified separately. Turbine blades specifically designed for steam turbines are classified under 8406904000 (rotating or stationary blades), while general fasteners — even if used in the same overhaul — are classified under their own headings (e.g., heading 7318 for steel bolts). Bundling dissimilar articles under a single turbine-parts line is a common compliance error that can trigger CBP penalty proceedings.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| UNITED KINGDOM | $25K | $3.3M | +$3.3M |
| JAPAN | $2.4M | $505K | -$1.9M |
| CANADA | $170K | $2.5M | +$2.3M |
| ITALY | $2.3M | $26K | -$2.3M |
| MEXICO | $1.4M | $344K | -$1.1M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 8406904000 | BLADES, ROTATING OR STATIONARY,PRTS OF STEAM TURBI | $4.5M | 33.90% | $1.5M |
| 8406904580 | PARTS OF STEAM TURBINES, NESOI | $4.3M | 15.36% | $574K |
| 8406907500 | PARTS OF VAPOR TURBINES, NESOI | $814K | 8.59% | $65K |
| 8406904540 | ROTORS,SPINDLES,OR THEIR ASSEMBLIES FOR STEAM TURB | $469K | 15.00% | $70K |
| 8406902000 | ROTORS,FINISHED FOR FINAL ASSEMBLY,PRT OF STEA TUR | $367K | 15.00% | $55K |
| 8406905000 | ROTORS,FINSHD FOR FINAL ASSEMLY,PRTS OF VAPOR TURB | $353K | 9.20% | $23K |
| 8406907000 | BLADES,ROTATING OR STATIONARY,PRTS OF VAPOR TURBIN | $285K | 0.00% | -- |
| 8406903000 | ROTORS,NOT FURTHER ADVANCED OR TO PERMIT FINIS MAC | $0 | -- | -- |
BLADES, ROTATING OR STATIONARY,PRTS OF STEAM TURBI
PARTS OF STEAM TURBINES, NESOI
PARTS OF VAPOR TURBINES, NESOI
ROTORS,SPINDLES,OR THEIR ASSEMBLIES FOR STEAM TURB
ROTORS,FINISHED FOR FINAL ASSEMBLY,PRT OF STEA TUR
ROTORS,FINSHD FOR FINAL ASSEMLY,PRTS OF VAPOR TURB
BLADES,ROTATING OR STATIONARY,PRTS OF VAPOR TURBIN
ROTORS,NOT FURTHER ADVANCED OR TO PERMIT FINIS MAC
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8406900040 | PARTS FOR STEAM TURBINES | $10.3M |
| 8406900080 | PARTS FOR OTHER THAN STEAM VAPOR TURBINES | $4.1M |
PARTS FOR STEAM TURBINES
27.8K kg
PARTS FOR OTHER THAN STEAM VAPOR TURBINES
17.7K kg
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| State | Imports | Exports | Balance |
|---|---|---|---|
| Pennsylvania | $277K | $6.3M | +$6.0M |
| Georgia | $1.2M | $2.2M | +$986K |
| Florida | $750K | $2.0M | +$1.2M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| JFK INTERNATIONAL AIRPORT, NY | $1.5M | $4.0M | +$2.5M |
| ATLANTA, GA | $1.5M | $1.4M | -$7K |
| CLEVELAND, OH | $329K | $1.9M | +$1.6M |