HS code · 6-digit subheading

HS Code 8406.10 – Turbines; steam and other vapour turbines, for marine propulsion

HS code 8406.10 is the 6-digit subheading for turbines, steam and other vapour turbines, for marine propulsion. It is used for marine steam turbines, naval propulsion turbines, LNG carrier steam turbines, cruise ship steam turbines and nuclear submarine turbines.

What HS 8406.10 covers

This HS code specifically covers steam and other vapor turbines designed for marine propulsion. These highly specialized and robust turbines are critical components for powering large vessels, including naval ships, LNG carriers, and some cruise liners, where high power output and reliability are paramount. The international trade in these turbines is a niche but high-value market, dominated by a few global manufacturers and purchased by major shipbuilding nations. Importers are typically shipyards and naval contractors, while exporters are advanced industrial economies with strong heavy engineering and defense industries. Key considerations include stringent performance requirements, compact design, and resistance to harsh marine environments.

Covers
  • Marine steam turbines
  • Naval propulsion turbines
  • LNG carrier steam turbines
  • Cruise ship steam turbines
  • Nuclear submarine turbines
  • Steam turbine propulsion units
Examples
  • 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. Distinct from land-based power generation turbines (840681, 840682) due to specific design requirements for marine environments, propulsion, and often compact size. The 'for marine propulsion' is the key differentiator.

8406.81Turbines; steam and other vapour turbines, (for other than marine propulsion), of an output exceeding 40MW8406.82Turbines; steam and other vapour turbines, (for other than marine propulsion), of an output not exceeding 40MW

Top exporters and importers of HS code 840610, 2025

In 2025, the largest exporter of HS code 840610 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.

Top exporters 2025 · share of world exports

  1. 1 United States $8.5M
  2. 2 Singapore $851K
  3. 3 Faroe Islands* ~$818K

World total: $12M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Finland $9.7M
  2. 2 Singapore $4.4M
  3. 3 Malaysia $1.9M

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 8406.10

Brazil does not split HS 8406.10: its NCM code is 8406.10.00.

  1. 8406.10.00 Steam turbines for marine propulsionTurbinas para propulsão de embarcações

All Brazil NCM codes in heading 84.06 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 8406.10

What is HS code 840610?

HS code 840610 is a 6-digit subheading in the Harmonized System that covers: Turbines; steam and other vapour turbines, for marine propulsion. This HS code specifically covers steam and other vapor turbines designed for marine propulsion. These highly specialized and robust turbines are critical components for powering large vessels, including naval ships, LNG carriers, and some cruise liners, where high power output and reliability are paramount. The international trade in these turbines is a niche but high-value market, dominated by a few global manufacturers and purchased by major shipbuilding nations. Importers are typically shipyards and naval contractors, while exporters are advanced industrial economies with strong heavy engineering and defense industries. Key considerations include stringent performance requirements, compact design, and resistance to harsh marine environments.

What products fall under HS code 840610?

Marine steam turbines, naval propulsion turbines, LNG carrier steam turbines, cruise ship steam turbines, nuclear submarine turbines, steam turbine propulsion units

What are common misclassifications for HS code 840610?

Distinct from land-based power generation turbines (840681, 840682) due to specific design requirements for marine environments, propulsion, and often compact size. The 'for marine propulsion' is the key differentiator.

Which countries are the top exporters of goods under HS code 840610?

In 2025, the top exporters of HS code 840610 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 goods under HS code 840610?

In 2025, the top importers of HS code 840610 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.

How is HS code 840610 structured?

HS code 840610 is a 6-digit subheading under the Harmonized System. The first 2 digits (84) identify the chapter, digits 3-4 (06) identify the heading, and digits 5-6 (10) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 840610?

In Brazil, HS code 840610 is NCM 8406.10.00. The last two digits are 00 because Brazil does not split this HS code further.