7304.51 Steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section
A full HS code. These six digits are what goes on a customs declaration, and they mean the same thing in every country that uses the Harmonized System.
Section XV, Base Metals — iron, steel, copper, aluminium, other base metals and articles thereof.
- 73 Chapter Iron or steel articles
- 04 Heading Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel
- 51 Subheading Steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section
Chapter 73 covers iron or steel articles: pipes, tubes, structural components, fasteners, tanks and household steel goods, downstream of the primary steel forms in chapter 72. Classification tip: Like chapter 72, finished steel articles (pipe, tube, fasteners) are frequent anti-dumping targets: check the current trade-remedy list for the specific product and origin country before quoting a landed cost.
All of chapter 73Other codes under 73.04
The wording above is the Harmonized System nomenclature as published by the World Customs Organization, HS 2022 edition. It is a classification reference, not a tariff: it carries no duty rates, and it stops at six digits — the importing country adds its own beyond that.
Classification is decided by the General Rules of Interpretation and the section and chapter notes, and it is the importing country’s customs authority that makes it binding.
Shipping goods under 7304.51? A customs hold shows up as a milestone that stops moving — follow the container or the air waybill from departure to delivery.
Track a shipment7304.51 FAQ
7304.51 covers steel, alloy (not stainless steel); seamless, cold-drawn or cold-rolled (cold-reduced), tubes, pipes and hollow profiles of circular cross-section. It sits under heading 73.04 (tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel) in chapter 73, Section XV of the Harmonized System.
It is the international part of it. Six digits are the same in every country that applies the Harmonized System; the importing country then extends them to eight or ten for its own tariff and statistics. Declare 7304.51 plus whatever national digits the destination’s tariff schedule adds to it.
The General Rules of Interpretation, read together with the notes to Section XV and to chapter 73. A description that reads right is not enough on its own — the notes routinely pull goods out of the chapter they obviously belong to and put them somewhere else. Where duty or licensing turns on the answer, ask the importing country’s customs authority for a binding ruling.
A wrong or missing code is one of the common reasons customs holds a container, and a hold shows up as a milestone that stops moving. Watch for it in the container tracking app, on the air waybill in the air cargo tracker, or through the tracking API.