HS code · 6-digit subheading
HS Code 8406.90 – Turbines; parts of steam and other vapour turbines
HS code 8406.90 is the 6-digit subheading for turbines, parts of steam and other vapour turbines. It is used for turbine blades, rotors, diaphragms, casings and bearings (for turbines).
What HS 8406.90 covers
This HS code covers all parts of steam and other vapor turbines, encompassing components for both marine propulsion (840610) and non-marine applications (840681, 840682). This category is vital for the manufacturing, assembly, maintenance, and repair of these complex power-generating machines. The international trade involves a vast array of precision-engineered components, often made from specialized alloys to withstand extreme conditions. Importers include turbine manufacturers, power plant operators, shipyards, and MRO service providers globally, who rely on a robust supply chain for critical spares and upgrades. Exporters are typically advanced manufacturing nations with expertise in metallurgy and precision machining.
- Covers
- Turbine blades
- Rotors
- Diaphragms
- Casings
- Bearings (for turbines)
- Seals (for turbines)
- Control valves (for turbines)
- Turbine shafts
- Nozzle blocks
- Labyrinth seals
- Examples
- Siemens Energy turbine blades
- GE Power rotor assemblies
- Mitsubishi Heavy Industries turbine casings
- SKF turbine bearings
Codes often confused with 8406.90
Common mistake. Can be confused with parts of gas turbines (841190) or general machinery parts (8487) if not clearly identified as specific to steam or other vapor turbines. The material and design are often unique to steam applications.
Top exporters and importers of HS code 840690, 2025
In 2025, the largest exporter of HS code 840690 in UN Comtrade data was Germany, with 16% of world exports; the largest importer in UN Comtrade data was China, with 12% 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 Germany $496M 16% of world exports
- 2 Japan $455M 15% of world exports
- 3 China $370M 12% of world exports
World total: $3.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $344M 12% of world imports
- 2 United States $292M 9.9% of world imports
- 3 Saudi Arabia $268M 9.1% of world imports
World total: $3.0B 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 that did not report are estimated from what other countries recorded trading with them. 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 codes for 8406.90 5
Brazil splits HS 8406.90 into 5 NCM codes, Mercosur's 8-digit tariff lines.
- 8406.90.1 RotorsRotores Group
- 8406.90.11 Rotors for multi-stage reaction steam turbinesDe turbinas a reação, de múltiplos estágios
- 8406.90.19 Other steam turbine rotorsOutras
- 8406.90.2 BladesPalhetas Group
- 8406.90.21 Fixed stator blades for steam turbinesFixas (de estator)
- 8406.90.29 Other steam turbine bladesOutras
- 8406.90.90 Other steam turbine partsOutras
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 8406.90
What is HS code 840690?
HS code 840690 is a 6-digit subheading in the Harmonized System that covers: Turbines; parts of steam and other vapour turbines. This HS code covers all parts of steam and other vapor turbines, encompassing components for both marine propulsion (840610) and non-marine applications (840681, 840682). This category is vital for the manufacturing, assembly, maintenance, and repair of these complex power-generating machines. The international trade involves a vast array of precision-engineered components, often made from specialized alloys to withstand extreme conditions. Importers include turbine manufacturers, power plant operators, shipyards, and MRO service providers globally, who rely on a robust supply chain for critical spares and upgrades. Exporters are typically advanced manufacturing nations with expertise in metallurgy and precision machining.
What products fall under HS code 840690?
Turbine blades, rotors, diaphragms, casings, bearings (for turbines), seals (for turbines), control valves (for turbines), turbine shafts, nozzle blocks, labyrinth seals
What are common misclassifications for HS code 840690?
Can be confused with parts of gas turbines (841190) or general machinery parts (8487) if not clearly identified as specific to steam or other vapor turbines. The material and design are often unique to steam applications.
Which countries are the top exporters of goods under HS code 840690?
In 2025, the top exporters of HS code 840690 in UN Comtrade data were Germany ($496M, 16% of world exports), Japan ($455M) and China ($370M). World exports came to about $3.0B, 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 840690?
In 2025, the top importers of HS code 840690 in UN Comtrade data were China ($344M, 12% of world imports), the United States ($292M) and Saudi Arabia ($268M). World imports came to about $3.0B, 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 840690 structured?
HS code 840690 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 (90) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 840690?
Brazil splits HS code 840690 into 5 NCM codes: 8406.90.11 (Rotors for multi-stage reaction steam turbines), 8406.90.19 (Other steam turbine rotors), 8406.90.21 (Fixed stator blades for steam turbines), 8406.90.29 (Other steam turbine blades), 8406.90.90 (Other steam turbine parts). The first 6 digits of each match the HS code.