Product classification
HS code for Welded steel square tube: 7306.61
Iron or steel (excluding cast iron), tubes, pipes and hollow profiles (not seamless), welded, of square or rectangular cross-section, n.e.c. in chapter 73.
Classification of welded steel square tube under HS 7306.61
Welded steel square tubes are classified under HS code 7306.61 because they represent articles of iron or steel that are formed into a hollow profile and joined by a welding process. Unlike seamless tubes, these products feature a visible or internal weld seam resulting from the joining of steel strips or plates. The 7306 heading specifically covers tubes and pipes that are not seamless and do not meet the specific diameter requirements of heading 7305 (which covers tubes with a diameter exceeding 406.4 mm). The subheading 7306.61 is reserved for those with a square or rectangular cross-section, distinguishing them from circular or other non-standard shapes. This classification is determined by the manufacturing method (welding) and the geometric profile (square or rectangular), ensuring they are distinguished from structural shapes that are not hollow.
- Covers
- Structural square hollow sections (SHS)
- Rectangular hollow sections (RHS) for furniture
- Welded steel box sections for construction
- Galvanized square welded tubing
- Cold-formed welded square pipes
- Also under 7306.61
- ArcelorMittal structural tubing
- Tata Steel RHS
- Nippon Steel SHS
- SSAB structural profiles
Codes often confused with 7306.61
Common mistake. These products are frequently confused with HS code 7304.90, which covers seamless tubes. The primary distinction is the presence of a weld seam; if the tube is manufactured without a seam, it must be moved to 7304. Additionally, if the tube has a circular cross-section, it falls under 7306.30 or 7306.50 depending on the alloy. Another common error is using 7305.11, which is only for large-diameter pipes exceeding 406.4 mm used for oil or gas pipelines.
Top exporters and importers of HS 730661 (the code used for welded steel square tube), 2025
In 2025, the largest exporter of HS 730661 (the code used for welded steel square tube) in UN Comtrade data was Italy, with 19% of world exports; the largest importer in UN Comtrade data was Germany, with 9.2% 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 730661, not only welded steel square tube.
Top exporters 2025 · share of world exports
- 1 Italy $1.4B 19% of world exports
- 2 China $1.3B 18% of world exports
- 3 Türkiye $544M 7.8% of world exports
World total: $7.0B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $635M 9.2% of world imports
- 2 United States $555M 8.0% of world imports
- 3 France $397M 5.7% of world imports
World total: $6.9B 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 welded steel square tube
Brazil classifies welded steel square tube under NCM 7306.61.00: HS 7306.61 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 welded steel square tube
What is the HS code for Welded steel square tube?
The HS code for Welded steel square tube is 730661 (Iron or steel (excluding cast iron); tubes, pipes and hollow profiles (not seamless), welded, of square or rectangular cross-section, n.e.c. in chapter 73). The primary HS code for welded steel square or rectangular tubes is 7306.61.
How do I classify Welded steel square tube for customs?
Welded steel square tube is classified under HS code 730661 — Iron or steel (excluding cast iron); tubes, pipes and hollow profiles (not seamless), welded, of square or rectangular cross-section, n.e.c. in chapter 73. This is a 6-digit subheading level code.
Does this code include stainless steel square tubes?
No, stainless steel welded tubes of square or rectangular cross-section are typically classified under 7306.61 as well, but some jurisdictions may require 7306.40 if they are circular; however, for square profiles, 7306.61 remains the standard for most iron and steel alloys.
Which countries are the top exporters of welded steel square tube (HS 730661)?
In 2025, the top exporters of HS 730661 (the code used for welded steel square tube) in UN Comtrade data were Italy ($1.4B, 19% of world exports), China ($1.3B) and Türkiye ($544M). World exports came to about $7.0B, 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 welded steel square tube (HS 730661)?
In 2025, the top importers of HS 730661 (the code used for welded steel square tube) in UN Comtrade data were Germany ($635M, 9.2% of world imports), the United States ($555M) and France ($397M). World imports 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.
Is the HS code for Welded steel square tube the same in all countries?
The base HS code 730661 for Welded steel square tube 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 welded steel square tube in Brazil?
In Brazil, welded steel square tube (HS 730661) is classified under NCM 7306.61.00.