Product classification
HS code for Cold-drawn alloy steel pipes: 7304.51
Steel, alloy (not stainless steel), seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section.
Classification of cold-drawn alloy steel pipes under HS 7304.51
Cold-drawn alloy steel pipes are classified under HS code 7304.51. This code is situated within Chapter 73, which covers articles of iron or steel. Heading 7304 is reserved for tubes, pipes, and hollow profiles that are seamless. The term "seamless" indicates that the product is manufactured without a welded seam, typically through a process of piercing a solid billet. Subheading 7304.51 specifically applies to products made of "other alloy steel," as defined in Note 1(f) to Chapter 72. This definition includes steel containing elements like chromium, manganese, or molybdenum in specific weight percentages that exceed the limits for non-alloy steel. The "cold-drawn" or "cold-rolled" designation means the pipe has undergone secondary processing at room temperature to achieve tighter tolerances, improved mechanical properties, and a smoother finish. This distinguishes it from hot-finished pipes. For a product to be classified here, it must meet three criteria: it must be seamless, it must be made of alloy steel (but not stainless steel), and it must be cold-processed. If the pipe is made of non-alloy steel, it moves to heading 7304.31. If it is stainless steel, it moves to 7304.41. The circular cross-section is also a requirement for this specific subheading. Importers must provide a Mill Test Report (MTR) to confirm the chemical composition and the manufacturing method to ensure compliance with customs regulations.
- Covers
- Seamless cold-drawn alloy steel tubes
- Cold-finished alloy steel hydraulic pipes
- Precision alloy steel tubes for automotive applications
- High-strength seamless alloy pipes (cold-reduced)
- Alloy steel boiler tubes (seamless and cold-drawn)
- Also under 7304.51
- 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 often confused with 7304.31, which is for non-alloy (carbon) steel pipes. It is also frequently mixed up with 7304.41, which is specifically for stainless steel. Another common error is using 7304.59, which covers alloy steel pipes that are hot-finished rather than cold-drawn. Finally, welded alloy pipes must be classified under 7306, not 7304.
Top exporters and importers of HS 730451 (the code used for cold-drawn alloy steel pipes), 2025
In 2025, the largest exporter of HS 730451 (the code used for cold-drawn alloy steel pipes) 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.
Figures cover everything classified under HS 730451, not only cold-drawn alloy steel pipes.
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 cold-drawn alloy steel pipes
Brazil splits HS 7304.51 into 3 NCM codes. Pick the one that matches your product:
- 7304.51.11Alloy capillary tubes, OD 3 mm, ID 0.2 mm max
- 7304.51.19Cold-drawn/rolled alloy steel tubes, OD to 229 mm
- 7304.51.90Other cold-drawn/rolled alloy tubes and profiles
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 cold-drawn alloy steel pipes
What is the HS code for Cold-drawn alloy steel pipes?
The HS code for Cold-drawn alloy steel pipes is 730451 (Steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section). The HS code for seamless, cold-drawn or cold-rolled alloy steel pipes of circular cross-section is 7304.51.
How do I classify Cold-drawn alloy steel pipes for customs?
Cold-drawn alloy steel pipes is classified under HS code 730451 — Steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section. This is a 6-digit subheading level code.
How do I distinguish between alloy steel and non-alloy steel for classification?
Classification depends on the chemical composition; alloy steel contains specific levels of elements like chromium (0.3%+), manganese (1.65%+), or molybdenum (0.08%+) as defined in Chapter 72 Note 1(f).
Which countries are the top exporters of cold-drawn alloy steel pipes (HS 730451)?
In 2025, the top exporters of HS 730451 (the code used for cold-drawn alloy steel pipes) 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 cold-drawn alloy steel pipes (HS 730451)?
In 2025, the top importers of HS 730451 (the code used for cold-drawn alloy steel pipes) 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.
Is the HS code for Cold-drawn alloy steel pipes the same in all countries?
The base HS code 730451 for Cold-drawn alloy steel pipes 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 cold-drawn alloy steel pipes in Brazil?
Brazil splits HS 730451 into 3 NCM codes, so the right one for cold-drawn alloy steel pipes depends on the product's details: 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).