Product classification
HS code for Treated coniferous railway sleepers: 4406.91
Wood, railway or tramway sleepers (cross-ties), impregnated, coniferous.
Classification of treated coniferous railway sleepers under HS 4406.91
Treated coniferous railway sleepers, also known as cross-ties, are classified under HS code 4406.91. Heading 4406 is dedicated to railway or tramway sleepers of wood. The classification is split between sleepers that are "not impregnated" and those that are "impregnated." Subheading 4406.91 specifically covers impregnated sleepers made from coniferous wood species like pine, fir, or spruce. "Impregnated" in this context means the wood has been deeply treated with preservatives, such as creosote or other chemical salts, usually under high pressure, to ensure longevity and resistance to rot and insects in harsh outdoor environments. This classification is determined by the intended use of the product (railway infrastructure) and the specific botanical origin of the wood combined with the chemical treatment it has undergone.
- Covers
- Creosote-impregnated pine railway sleepers
- Pressure-treated spruce cross-ties for tramways
- Impregnated coniferous wood blocks for track support
- Treated Douglas fir railway sleepers
- Chemically preserved coniferous ties for rail switches
- Also under 4406.91
- Koppers (wood treatment)
- Stella-Jones (treated wood products)
- various railway infrastructure suppliers
Codes often confused with 4406.91
Common mistake. The most frequent misclassification occurs with HS code 4406.11, which is for coniferous railway sleepers that are NOT impregnated. If the wood has only been surface-treated or not treated at all, it belongs in 4406.11. Another error is classifying these under 4407 (sawn wood). While sleepers are sawn, heading 4406 is more specific to their function and takes precedence over the general sawn wood heading. Additionally, sleepers made of non-coniferous wood (hardwoods like oak) are classified under 4406.92 if impregnated. Steel railway sleepers are entirely excluded from Chapter 44 and are classified under 7302.
Top exporters and importers of HS 440691 (the code used for treated coniferous railway sleepers), 2025
In 2025, the largest exporter of HS 440691 (the code used for treated coniferous railway sleepers) in UN Comtrade data was the United States, with 29% of world exports; the largest importer in UN Comtrade data was the Netherlands, with 60% of world imports. Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 36% of its exports here ($2.0M, CEPII BACI), so it may rank higher.
Figures cover everything classified under HS 440691, not only treated coniferous railway sleepers.
Top exporters 2025 · share of world exports
- 1 United States $6.5M 29% of world exports
- 2 Russia* ~$5.6M 25% of world exports · partner records ↗
- 3 Netherlands $2.2M 9.6% of world exports
Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 36% of its exports here ($2.0M, CEPII BACI), so it may rank higher.
World total: $22M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Netherlands $32M 60% of world imports
- 2 Kazakhstan $5.0M 9.6% of world imports
- 3 Germany $5.0M 9.4% of world imports
World total: $53M 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 treated coniferous railway sleepers
Brazil classifies treated coniferous railway sleepers under NCM 4406.91.00: HS 4406.91 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 coniferous railway sleepers
What is the HS code for Treated coniferous railway sleepers?
The HS code for Treated coniferous railway sleepers is 440691 (Wood; railway or tramway sleepers (cross-ties), impregnated, coniferous). The HS code for impregnated (treated) coniferous railway or tramway sleepers is 4406.91.
How do I classify Treated coniferous railway sleepers for customs?
Treated coniferous railway sleepers is classified under HS code 440691 — Wood; railway or tramway sleepers (cross-ties), impregnated, coniferous. This is a 6-digit subheading level code.
What is the difference between impregnated and non-impregnated sleepers?
Impregnated sleepers (4406.91) have undergone a deep-pressure treatment with preservatives like creosote to prevent decay. Non-impregnated sleepers (4406.11) have not received this deep chemical treatment, though they may have had superficial applications.
Which countries are the top exporters of treated coniferous railway sleepers (HS 440691)?
In 2025, the top exporters of HS 440691 (the code used for treated coniferous railway sleepers) in UN Comtrade data were the United States ($6.5M, 29% of world exports), Russia (about $5.6M) and the Netherlands ($2.2M). World exports came to about $22M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Russia did not report 2025 data, and its estimate from partner records misses its trade with other countries that did not report: in 2024 that was 36% of its exports here ($2.0M, CEPII BACI), so it may rank higher.
Which countries are the top importers of treated coniferous railway sleepers (HS 440691)?
In 2025, the top importers of HS 440691 (the code used for treated coniferous railway sleepers) in UN Comtrade data were the Netherlands ($32M, 60% of world imports), Kazakhstan ($5.0M) and Germany ($5.0M). World imports came to about $53M, 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 coniferous railway sleepers the same in all countries?
The base HS code 440691 for Treated coniferous 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 coniferous railway sleepers in Brazil?
In Brazil, treated coniferous railway sleepers (HS 440691) is classified under NCM 4406.91.00.