Product classification
HS code for Ship turbines: 8406.10
Turbines, steam and other vapour turbines, for marine propulsion.
Classification of ship turbines under HS 8406.10
Marine propulsion turbines, specifically those powered by steam or other vapors, are classified under HS code 8406.10. This classification is based on the intended use of the machinery as a prime mover for vessels. Under the Harmonized System, Chapter 84 covers nuclear reactors, boilers, machinery, and mechanical appliances. Heading 8406 specifically addresses steam turbines and other vapor turbines. The subheading 8406.10 is distinct because it isolates turbines used for marine propulsion from those used in stationary applications like land-based power plants, ensuring that maritime engineering components are tracked accurately in international trade.
- Covers
- Marine steam turbines
- Vapor turbines for naval vessels
- High-pressure turbines for LNG carriers
- Low-pressure marine propulsion turbines
- Steam turbine units for cruise ships
- Also under 8406.10
- GE Marine steam turbines
- Siemens Energy marine turbines
- Mitsubishi Heavy Industries marine propulsion systems
- Kawasaki Heavy Industries marine turbines
Codes often confused with 8406.10
Common mistake. A common misclassification occurs when marine turbines are placed under HS code 8406.81 or 8406.82, which are reserved for other turbines (such as those used for electrical generation). Additionally, gas turbines are often confused with steam turbines; gas turbines for marine propulsion must be classified under HS code 8411.81 or 8411.82 depending on their power output, rather than 8406.10.
Top exporters and importers of HS 840610 (the code used for ship turbines), 2025
In 2025, the largest exporter of HS 840610 (the code used for ship turbines) in UN Comtrade data was the United States, with 69% of world exports; the largest importer in UN Comtrade data was Finland, with 45% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 840610, not only ship turbines.
Top exporters 2025 · share of world exports
- 1 United States $8.5M 69% of world exports
- 2 Singapore $851K 6.9% of world exports
- 3 Faroe Islands* ~$818K 6.6% of world exports · partner records ↗
World total: $12M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Finland $9.7M 45% of world imports
- 2 Singapore $4.4M 21% of world imports
- 3 Malaysia $1.9M 9.0% of world imports
World total: $21M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for ship turbines
Brazil classifies ship turbines under NCM 8406.10.00: HS 8406.10 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about ship turbines
What is the HS code for Ship turbines?
The HS code for Ship turbines is 840610 (Turbines; steam and other vapour turbines, for marine propulsion). The HS code for steam and other vapor turbines for marine propulsion is 8406.10.
How do I classify Ship turbines for customs?
Ship turbines is classified under HS code 840610 — Turbines; steam and other vapour turbines, for marine propulsion. This is a 6-digit subheading level code.
Are gas turbines for ships included in this code?
No, gas turbines are classified under heading 8411, as 8406 is strictly for steam and vapor-driven turbines.
Which countries are the top exporters of ship turbines (HS 840610)?
In 2025, the top exporters of HS 840610 (the code used for ship turbines) in UN Comtrade data were the United States ($8.5M, 69% of world exports), Singapore ($851K) and the Faroe Islands (about $818K). World exports came to about $12M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of ship turbines (HS 840610)?
In 2025, the top importers of HS 840610 (the code used for ship turbines) in UN Comtrade data were Finland ($9.7M, 45% of world imports), Singapore ($4.4M) and Malaysia ($1.9M). World imports came to about $21M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Ship turbines the same in all countries?
The base HS code 840610 for Ship turbines is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for ship turbines in Brazil?
In Brazil, ship turbines (HS 840610) is classified under NCM 8406.10.00.