HS code · 6-digit subheading
HS Code 7304.51 – Steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section
HS code 7304.51 is the 6-digit subheading for steel, alloy (not stainless steel), seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section. It is used for cold-drawn alloy steel pipes, cold-rolled alloy steel tubes, high-strength seamless alloy tubing, precision alloy hollow profiles and automotive-grade alloy pipes.
What HS 7304.51 covers
This category covers seamless tubes, pipes, and hollow profiles of circular cross-section made from alloy steel (excluding stainless steel), which have been cold-drawn or cold-rolled. These products are highly sought after in international trade for their enhanced mechanical properties, such as increased strength, hardness, and wear resistance, achieved through the specific alloying elements and the cold-working process. They are critical components in demanding applications across industries like automotive, aerospace, heavy machinery, and specialized engineering, where high performance and reliability are paramount. Major importers and exporters include technologically advanced industrial nations such as Germany, Japan, the United States, and South Korea, which have sophisticated manufacturing sectors and a strong demand for high-performance materials. The trade is influenced by global manufacturing trends, technological advancements requiring specialized materials, and the need for durable components in high-stress environments.
- Covers
- Cold-drawn alloy steel pipes
- Cold-rolled alloy steel tubes
- High-strength seamless alloy tubing
- Precision alloy hollow profiles
- Automotive-grade alloy pipes
- Aerospace alloy tubing
- Hydraulic cylinder tubes
- Examples
- Timken seamless alloy tubes
- Sumitomo Metal Industries cold-drawn alloy pipes
- Sandvik high-strength alloy tubing
- JFE Steel cold-rolled alloy sections
Codes often confused with 7304.51
Common mistake. This code is differentiated from 730459 (alloy steel, not cold-drawn/rolled) by the "cold-drawn or cold-rolled" processing. It also differs from 730441 (stainless steel, cold-drawn/rolled) by the specific alloy composition (not stainless).
Top exporters and importers of HS code 730451, 2025
In 2025, the largest exporter of HS code 730451 in UN Comtrade data was China, with 32% of world exports; the largest importer in UN Comtrade data was China, with 8.8% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $197M 32% of world exports
- 2 Germany $110M 18% of world exports
- 3 Romania $46M 7.5% of world exports
World total: $609M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $62M 8.8% of world imports
- 2 Germany $47M 6.7% of world imports
- 3 India $43M 6.1% of world imports
World total: $699M 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 7304.51 3
Brazil splits HS 7304.51 into 3 NCM codes, Mercosur's 8-digit tariff lines.
- 7304.51.1 Tubes of an external diameter of 229 mm or lessTubos de diâmetro exterior inferior ou igual a 229 mm Group
- 7304.51.11 Alloy capillary tubes, OD 3 mm, ID 0.2 mm maxTubos capilares de diâmetro exterior inferior ou igual a 3 mm e diâmetro interior inferior ou igual a 0,2 mm
- 7304.51.19 Cold-drawn/rolled alloy steel tubes, OD to 229 mmOutros
- 7304.51.90 Other cold-drawn/rolled alloy tubes and profilesOutros
All Brazil NCM codes in heading 73.04 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
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 HS 7304.51
What is HS code 730451?
HS code 730451 is a 6-digit subheading in the Harmonized System that covers: Steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section. This category covers seamless tubes, pipes, and hollow profiles of circular cross-section made from alloy steel (excluding stainless steel), which have been cold-drawn or cold-rolled. These products are highly sought after in international trade for their enhanced mechanical properties, such as increased strength, hardness, and wear resistance, achieved through the specific alloying elements and the cold-working process. They are critical components in demanding applications across industries like automotive, aerospace, heavy machinery, and specialized engineering, where high performance and reliability are paramount. Major importers and exporters include technologically advanced industrial nations such as Germany, Japan, the United States, and South Korea, which have sophisticated manufacturing sectors and a strong demand for high-performance materials. The trade is influenced by global manufacturing trends, technological advancements requiring specialized materials, and the need for durable components in high-stress environments.
What products fall under HS code 730451?
Cold-drawn alloy steel pipes, Cold-rolled alloy steel tubes, High-strength seamless alloy tubing, Precision alloy hollow profiles, Automotive-grade alloy pipes, Aerospace alloy tubing, Hydraulic cylinder tubes
What are common misclassifications for HS code 730451?
This code is differentiated from 730459 (alloy steel, not cold-drawn/rolled) by the "cold-drawn or cold-rolled" processing. It also differs from 730441 (stainless steel, cold-drawn/rolled) by the specific alloy composition (not stainless).
Which countries are the top exporters of goods under HS code 730451?
In 2025, the top exporters of HS code 730451 in UN Comtrade data were China ($197M, 32% of world exports), Germany ($110M) and Romania ($46M). World exports came to about $609M, 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 goods under HS code 730451?
In 2025, the top importers of HS code 730451 in UN Comtrade data were China ($62M, 8.8% of world imports), Germany ($47M) and India ($43M). World imports came to about $699M, 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.
How is HS code 730451 structured?
HS code 730451 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (04) identify the heading, and digits 5-6 (51) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 730451?
Brazil splits HS code 730451 into 3 NCM codes: 7304.51.11 (Alloy capillary tubes, OD 3 mm, ID 0.2 mm max), 7304.51.19 (Cold-drawn/rolled alloy steel tubes, OD to 229 mm), 7304.51.90 (Other cold-drawn/rolled alloy tubes and profiles). The first 6 digits of each match the HS code.