Product classification
HS code for Treated hardwood railway sleepers: 4406.92
Wood, railway or tramway sleepers (cross-ties), impregnated, non-coniferous.
Classification of treated hardwood railway sleepers under HS 4406.92
Treated hardwood railway sleepers are classified under HS code 4406.92. This classification is part of Chapter 44 (Wood and articles of wood) and Heading 4406, which is dedicated to railway or tramway sleepers (cross-ties) of wood. The subheading 4406.92 specifically identifies sleepers made from non-coniferous (hardwood) species that have been impregnated. Impregnation refers to the process where preservatives, such as creosote or other chemical salts, are forced into the wood fibers, usually under pressure, to ensure durability against environmental elements and biological degradation. This classification follows GRI 1 and 6. The distinction between impregnated and not impregnated is critical; sleepers that are merely surface-treated or untreated fall under different subheadings. Hardwood is preferred for sleepers due to its density and strength, and the chemical treatment ensures a long service life in demanding track environments. The sleepers must be recognizable as such, typically having a rectangular cross-section and specific dimensions suited for rail support. This code excludes sleepers made of concrete or steel, which are classified in their respective material chapters.
- Covers
- Impregnated oak railway sleepers
- Creosote-treated tropical hardwood cross-ties
- Pressure-treated beech tramway sleepers
- Hardwood sleepers impregnated with copper-based preservatives
- Chemically treated hardwood switch ties
- Also under 4406.92
- Koppers treated timber sleepers
- Stella-Jones railway ties
- Lonza wood preservatives (used on sleepers)
- various national railway infrastructure projects
Codes often confused with 4406.92
Common mistake. A common misclassification occurs with HS code 4406.12, which is for non-coniferous sleepers that are not impregnated. If the wood has undergone pressure treatment or deep chemical penetration, 4406.92 is mandatory. Additionally, sleepers made from coniferous wood (softwood) are often confused with this code; those belong under 4406.91 if impregnated or 4406.11 if not. Importers must verify the wood species and the depth of treatment to ensure the correct subheading is applied.
Top exporters and importers of HS 440692 (the code used for treated hardwood railway sleepers), 2025
In 2025, the largest exporter of HS 440692 (the code used for treated hardwood railway sleepers) in UN Comtrade data was the United States, with 58% of world exports; the largest importer in UN Comtrade data was Canada, with 54% 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 440692, not only treated hardwood railway sleepers.
Top exporters 2025 · share of world exports
- 1 United States $122M 58% of world exports
- 2 Czechia $18M 8.7% of world exports
- 3 Germany $17M 8.0% of world exports
World total: $210M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Canada $104M 54% of world imports
- 2 Slovenia $10M 5.2% of world imports
- 3 Croatia $9.2M 4.7% of world imports
World total: $195M 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 code for treated hardwood railway sleepers
Brazil classifies treated hardwood railway sleepers under NCM 4406.92.00: HS 4406.92 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
EU Regulatory Requirements
This product category is subject to the EU Deforestation Regulation (EUDR). Importers must provide due diligence statements proving the product was not produced on deforested land after December 31, 2020.
This product is covered by the EU Timber Regulation (EUTR), requiring operators to exercise due diligence to minimize the risk of placing illegally harvested timber on the EU market.
Questions about treated hardwood railway sleepers
What is the HS code for Treated hardwood railway sleepers?
The HS code for Treated hardwood railway sleepers is 440692 (Wood; railway or tramway sleepers (cross-ties), impregnated, non-coniferous). The HS code for treated hardwood railway sleepers is 4406.92, covering impregnated non-coniferous sleepers.
How do I classify Treated hardwood railway sleepers for customs?
Treated hardwood railway sleepers is classified under HS code 440692 — Wood; railway or tramway sleepers (cross-ties), impregnated, non-coniferous. This is a 6-digit subheading level code.
What does impregnated mean in the context of HS code 4406.92?
Impregnated means the wood has been deeply treated with preservatives, usually via a vacuum-pressure process, rather than just receiving a surface coating.
Which countries are the top exporters of treated hardwood railway sleepers (HS 440692)?
In 2025, the top exporters of HS 440692 (the code used for treated hardwood railway sleepers) in UN Comtrade data were the United States ($122M, 58% of world exports), Czechia ($18M) and Germany ($17M). World exports came to about $210M, 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 treated hardwood railway sleepers (HS 440692)?
In 2025, the top importers of HS 440692 (the code used for treated hardwood railway sleepers) in UN Comtrade data were Canada ($104M, 54% of world imports), Slovenia ($10M) and Croatia ($9.2M). World imports came to about $195M, 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 Treated hardwood railway sleepers the same in all countries?
The base HS code 440692 for Treated hardwood railway sleepers 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 treated hardwood railway sleepers in Brazil?
In Brazil, treated hardwood railway sleepers (HS 440692) is classified under NCM 4406.92.00.