Product classification
HS code for Aluminum hollow bar: 7604.21
Aluminium, alloys, hollow profiles.
Classification of aluminum hollow bar under HS 7604.21
Aluminum hollow bars, specifically those made from aluminum alloys, are classified under HS code 7604.21. This subheading is part of heading 7604, which covers aluminum bars, rods, and profiles. The classification is determined by the product's cross-sectional shape and its material composition. A \"hollow profile\" is defined in the Chapter 76 notes as a product that has a cross-section other than that of tubes or pipes, or which does not meet the strict definition of tubes/pipes (which require a uniform wall thickness and a single closed void). Aluminum hollow bars are often used in machining and structural applications where the strength-to-weight ratio of an alloy is required. The classification under 7604.21 specifically denotes that the product is an alloyed aluminum hollow profile. This distinction is critical because non-alloyed aluminum profiles fall under a different subheading (7604.10). The manufacturing process, usually extrusion, results in a product that is more complex than a simple bar but does not quite meet the technical definition of a pipe used for fluid transport.
- Covers
- Extruded aluminum alloy hollow profiles
- Square aluminum hollow sections
- Rectangular aluminum hollow bars
- Custom-shaped alloyed hollow extrusions
- Architectural hollow profiles
- Also under 7604.21
- Hydro Building Systems profiles
- Sapa Extrusion hollows
- Alumex Architectural Profiles
- Constellium Hollow Extrusions
Codes often confused with 7604.21
Common mistake. Aluminum hollow bars are frequently confused with HS code 7608.20, which covers aluminum alloy tubes and pipes. The distinction lies in the uniformity of the wall thickness and the cross-section; tubes (7608) must have a uniform wall thickness, whereas hollow profiles (7604) may have varying thicknesses or complex internal geometries. Misclassifying these as solid bars under 7604.29 is also common but incorrect if the item is hollow.
Top exporters and importers of HS 760421 (the code used for aluminum hollow bar), 2025
In 2025, the largest exporter of HS 760421 (the code used for aluminum hollow bar) in UN Comtrade data was China, with 22% of world exports; the largest importer in UN Comtrade data was Germany, with 14% 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 760421, not only aluminum hollow bar.
Top exporters 2025 · share of world exports
- 1 China $1.5B 22% of world exports
- 2 Germany $897M 13% of world exports
- 3 Türkiye $646M 9.3% of world exports
World total: $6.9B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $864M 14% of world imports
- 2 United States $592M 9.8% of world imports
- 3 France $339M 5.6% of world imports
World total: $6.1B 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 aluminum hollow bar
Brazil classifies aluminum hollow bar under NCM 7604.21.00: HS 7604.21 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 falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Questions about aluminum hollow bar
What is the HS code for Aluminum hollow bar?
The HS code for Aluminum hollow bar is 760421 (Aluminium; alloys, hollow profiles). The HS code for alloyed aluminum hollow bars or profiles is 7604.21.
How do I classify Aluminum hollow bar for customs?
Aluminum hollow bar is classified under HS code 760421 — Aluminium; alloys, hollow profiles. This is a 6-digit subheading level code.
What is the difference between 7604 and 7608?
Heading 7604 is for profiles (including hollow ones with non-uniform walls), while 7608 is strictly for tubes and pipes with uniform wall thickness and a consistent cross-section.
Which countries are the top exporters of aluminum hollow bar (HS 760421)?
In 2025, the top exporters of HS 760421 (the code used for aluminum hollow bar) in UN Comtrade data were China ($1.5B, 22% of world exports), Germany ($897M) and Türkiye ($646M). World exports came to about $6.9B, 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 aluminum hollow bar (HS 760421)?
In 2025, the top importers of HS 760421 (the code used for aluminum hollow bar) in UN Comtrade data were Germany ($864M, 14% of world imports), the United States ($592M) and France ($339M). World imports came to about $6.1B, 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 Aluminum hollow bar the same in all countries?
The base HS code 760421 for Aluminum hollow bar 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 aluminum hollow bar in Brazil?
In Brazil, aluminum hollow bar (HS 760421) is classified under NCM 7604.21.00.