Product classification
HS code for Seamless alloy steel tubes: 7304.59
Steel, alloy (not stainless steel), (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section.
Classification of seamless alloy steel tubes under HS 7304.59
The classification of seamless alloy steel tubes under HS code 7304.59 is governed by the material composition and the manufacturing process. Chapter 73 covers articles of iron or steel, and heading 7304 specifically addresses seamless tubes, pipes, and hollow profiles. To qualify for 7304.59, the product must be made of \"alloy steel\" as defined in Note 1(f) to Chapter 72, which requires specific percentages of elements like aluminum, chromium, cobalt, or nickel. Furthermore, the \"seamless\" designation means the tube is produced by piercing a solid billet, typically through hot-rolling or extrusion, without any longitudinal or spiral weld seam. The sub-heading 7304.59 is a residual category for alloy steel tubes that have not undergone cold-drawing or cold-rolling (cold-finishing). These hot-finished tubes are used in high-stress applications such as power generation, chemical processing, and mechanical engineering where the properties of alloy steel are necessary for heat or pressure resistance. The absence of a weld seam provides uniform strength around the circumference, which is critical for containing high-pressure fluids or gases. Importers must provide mill test certificates to prove the alloy content and the hot-finished nature of the tubes to satisfy customs requirements for this specific code.
- Covers
- Hot-rolled seamless alloy steel pipes
- Mechanical tubing (hot-finished alloy)
- High-pressure alloy steel tubes
- Structural alloy steel hollow profiles
- Boiler tubes of alloy steel (hot-finished)
- Also under 7304.59
- Tenaris seamless alloy pipes
- Vallourec hot-finished alloy tubes
- ArcelorMittal alloy structural sections
- JFE Steel alloy industrial pipes
Codes often confused with 7304.59
Common mistake. This code is often confused with 7304.51, which is for cold-drawn or cold-rolled alloy steel tubes. The difference lies in the finishing process; 7304.59 is for hot-finished products. It is also sometimes misclassified under 7304.39, which is for non-alloy steel tubes, or 7304.49, which is for stainless steel tubes.
Top exporters and importers of HS 730459 (the code used for seamless alloy steel tubes), 2025
In 2025, the largest exporter of HS 730459 (the code used for seamless alloy steel tubes) in UN Comtrade data was China, with 30% of world exports; the largest importer in UN Comtrade data was India, with 19% 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 730459, not only seamless alloy steel tubes.
Top exporters 2025 · share of world exports
- 1 China $473M 30% of world exports
- 2 Germany $161M 10% of world exports
- 3 Italy $160M 10% of world exports
World total: $1.6B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 India $394M 19% of world imports
- 2 United States $213M 10% of world imports
- 3 Saudi Arabia $153M 7.4% of world imports
World total: $2.1B 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 codes for seamless alloy steel tubes
Brazil splits HS 7304.59 into 2 NCM codes. Pick the one that matches your product:
- 7304.59.10Hot-finished alloy steel tubes, OD to 229 mm
- 7304.59.90Other hot-finished seamless alloy steel 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 alloy steel tubes
What is the HS code for Seamless alloy steel tubes?
The HS code for Seamless alloy steel tubes is 730459 (Steel, alloy (not stainless steel); (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section).
How do I classify Seamless alloy steel tubes for customs?
Seamless alloy steel tubes is classified under HS code 730459 — Steel, alloy (not stainless steel); (excluding cold-drawn or cold-rolled), tubes, pipes and hollow profiles of circular cross-section. This is a 6-digit subheading level code.
What is the HS code for 7304.59?
The HS code 7304.59 refers to seamless tubes, pipes, and hollow profiles of alloy steel (other than stainless), which are not cold-drawn or cold-rolled.
How is alloy steel defined for this code?
Alloy steel must contain elements like chromium, manganese, or nickel in quantities exceeding the limits set in Chapter 72, Note 1(f).
Which countries are the top exporters of seamless alloy steel tubes (HS 730459)?
In 2025, the top exporters of HS 730459 (the code used for seamless alloy steel tubes) in UN Comtrade data were China ($473M, 30% of world exports), Germany ($161M) and Italy ($160M). World exports came to about $1.6B, 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 alloy steel tubes (HS 730459)?
In 2025, the top importers of HS 730459 (the code used for seamless alloy steel tubes) in UN Comtrade data were India ($394M, 19% of world imports), the United States ($213M) and Saudi Arabia ($153M). World imports came to about $2.1B, 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 Seamless alloy steel tubes the same in all countries?
The base HS code 730459 for Seamless alloy 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 alloy steel tubes in Brazil?
Brazil splits HS 730459 into 2 NCM codes, so the right one for seamless alloy steel tubes depends on the product's details: 7304.59.10 (Hot-finished alloy steel tubes, OD to 229 mm), 7304.59.90 (Other hot-finished seamless alloy steel tubes).