Product classification
HS code for Seamless steel tubes: 7304.39
Iron or non-alloy steel (excluding cast iron), seamless, (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section.
Classification of seamless steel tubes under HS 7304.39
Seamless steel tubes classified under HS code 7304.39 are defined by their manufacturing process and material composition. This code specifically covers tubes, pipes, and hollow profiles made of iron or non-alloy steel. The classification is determined by General Interpretative Rule (GRI) 1, which looks at the heading 7304 for seamless articles of iron or steel. Subheading 7304.39 is reserved for products that have not undergone a cold-drawing or cold-rolling process, typically referred to as hot-finished or hot-rolled tubes. These products must have a circular cross-section to qualify. The absence of a longitudinal or spiral weld distinguishes these from products in headings 7305 or 7306. Non-alloy steel is defined in the Chapter 72 notes based on specific weight percentages of elements like manganese, silicon, and copper. Because these tubes are hot-finished, they generally possess thicker walls and a less precise surface finish compared to their cold-processed counterparts, making them suitable for high-pressure applications in structural, mechanical, and industrial piping systems where the precision of cold-finishing is not required.
- Covers
- Hot-rolled seamless carbon steel pipes
- Hot-finished non-alloy steel hollow profiles
- Seamless structural steel tubing (hot-finished)
- Heavy-wall seamless mechanical tubing
- Hot-finished boiler tubes of non-alloy steel
- Also under 7304.39
- Tenaris seamless pipes
- Vallourec hot-finished tubes
- ArcelorMittal structural hollow sections
- JFE Steel seamless non-alloy pipes
Codes often confused with 7304.39
Common mistake. This code is frequently confused with HS code 7304.31, which covers seamless tubes of iron or non-alloy steel that are cold-drawn or cold-rolled. The distinction lies entirely in the secondary manufacturing stage; cold-processed tubes have tighter tolerances and are classified under .31. Additionally, if the tube is made of stainless steel, it must be moved to subheadings 7304.41 or 7304.49. If the tube has a non-circular cross-section, such as square or rectangular, it may fall under 7304.90. Finally, if the outer diameter exceeds 406.4 mm and the tube is welded, it belongs in heading 7305.
Top exporters and importers of HS 730439 (the code used for seamless steel tubes), 2025
In 2025, the largest exporter of HS 730439 (the code used for seamless steel tubes) in UN Comtrade data was China, with 36% of world exports; the largest importer in UN Comtrade data was Germany, with 12% 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 730439, not only seamless steel tubes.
Top exporters 2025 · share of world exports
- 1 China $1.2B 36% of world exports
- 2 Germany $374M 11% of world exports
- 3 Italy $286M 8.4% of world exports
World total: $3.4B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $452M 12% of world imports
- 2 Italy $304M 8.3% of world imports
- 3 India $247M 6.7% of world imports
World total: $3.7B 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 seamless steel tubes
Brazil splits HS 7304.39 into 3 NCM codes. Pick the one that matches your product:
- 7304.39.10Hot-finished uncoated non-alloy tube, OD to 229 mm
- 7304.39.20Hot-finished coated non-alloy tube, OD to 229 mm
- 7304.39.90Other hot-finished seamless non-alloy tubes
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 seamless steel tubes
What is the HS code for Seamless steel tubes?
The HS code for Seamless steel tubes is 730439 (Iron or non-alloy steel (excluding cast iron); seamless, (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section). The HS code for hot-finished seamless tubes of iron or non-alloy steel with a circular cross-section is 7304.39.
How do I classify Seamless steel tubes for customs?
Seamless steel tubes is classified under HS code 730439 — Iron or non-alloy steel (excluding cast iron); seamless, (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section. This is a 6-digit subheading level code.
How does 7304.39 differ from 7304.31?
HS code 7304.31 is specifically for tubes that have been cold-drawn or cold-rolled to achieve precise dimensions, whereas 7304.39 is for hot-finished tubes.
Which countries are the top exporters of seamless steel tubes (HS 730439)?
In 2025, the top exporters of HS 730439 (the code used for seamless steel tubes) in UN Comtrade data were China ($1.2B, 36% of world exports), Germany ($374M) and Italy ($286M). World exports came to about $3.4B, 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 seamless steel tubes (HS 730439)?
In 2025, the top importers of HS 730439 (the code used for seamless steel tubes) in UN Comtrade data were Germany ($452M, 12% of world imports), Italy ($304M) and India ($247M). World imports came to about $3.7B, 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 Seamless steel tubes the same in all countries?
The base HS code 730439 for Seamless steel tubes 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 seamless steel tubes in Brazil?
Brazil splits HS 730439 into 3 NCM codes, so the right one for seamless steel tubes depends on the product's details: 7304.39.10 (Hot-finished uncoated non-alloy tube, OD to 229 mm), 7304.39.20 (Hot-finished coated non-alloy tube, OD to 229 mm), 7304.39.90 (Other hot-finished seamless non-alloy tubes).