Tandom · Duty calculator
Add country and invoice value for the full duty stack — base + 301 + 232 + AD/CVD + fees.
HTS 7306.90.50.00 is the U.S. Harmonized Tariff Schedule classification for Other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel, of alloy steel. It's a 10-digit statistical line in Chapter 73: Articles of iron or steel, Section XV: Base Metals and Articles of Base Metal, used by U.S. Customs and Border Protection to determine the duty rate at entry. 15 Chapter 99 tariff modifications currently stack on top of the base rate.
New to HTS codes? Read our guide on how HTS classification works →
Chapter 99 overlays that stack on the base rate
| Code | Authority | Rate |
|---|---|---|
| 9903.80.01 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.80.27 | section_232 | Free |
| 9903.80.61 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.80.87 | section_232 | Free |
| 9903.81.47 | section_232 | Free |
| 9903.81.83 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.81.85 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.81.87 | section_232 | The duty provided in the applicable subheading + 50%. |
| 9903.81.88 | section_232 | The duty provided in the applicable subheading + 50%. |
| 9903.81.94 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.81.95 | section_232 | The duty provided in the applicable subheading + 25% |
| 9903.82.02 | section_232 | 50% |
| 9903.82.04 | section_232 | 25% |
| 9903.82.18 | section_232 | no change |
| 9903.91.01 | section_301 | The duty provided in the applicable subheading + 25% |
Past CBP decisions classifying real products under this HTS code. Useful precedent when classifying a similar product — each ruling shows how CBP interpreted the code for a specific case.
The tariff classification and country of origin of pipe-in-pipe assemblies. Correction to Ruling Number N328388.
The tariff classification and country of origin of pipe-in-pipe assemblies
The tariff classification of double walled and insulated stove pipes from Canada
The tariff classification of stainless steel gas vent system components from Canada.
Source: CBP CROSS (view all rulings on rulings.cbp.gov →)
HTS 7306.90.50.00 is the U.S. Harmonized Tariff Schedule classification for Other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel, of alloy steel. It belongs to Chapter 73 of the HTSUS.
The general (Column 1) duty rate for HTS 7306.90.50.00 is Free. This is the most-favored-nation (MFN) rate that applies to imports from World Trade Organization member countries.
The Column 2 rate for HTS 7306.90.50.00 is 10%. This rate applies to imports from countries that do not have normal trade relations with the United States (currently Cuba and North Korea).
Yes — HTS 7306.90.50.00 is covered by section_232 provision 9903.80.01 (The duty provided in the applicable subheading + 25%). 14 additional overlays also touch this code. Open the code page for the full overlay stack with effective dates and country scopes.
No active AD/CVD orders currently flag HTS 7306.90.50.00 in Tandom's catalog. Tandom monitors Federal Register notices daily; a flag will appear here within 24h of any new order's publication.
Section and chapter notes that govern this code
Throughout this schedule, the expression 'base metals' means: iron and steel, copper, nickel, aluminum, lead, zinc, tin, tungsten (wolfram), molybdenum, tantalum, magnesium, cobalt, bismuth, cadmium, titanium, zirconium, antimony, manganese, beryllium, chromium, germanium, vanadium, gallium, hafnium, indium, niobium (columbium), rhenium, and thallium.
Classification of alloys: (a) Alloys of base metals with each other are to be classified as alloys of the metal which predominates by weight over each of the other metals; (b) Alloys of base metals of this section with elements not falling within this section are to be classified as alloys of base metals of this section if the total weight of such metals equals or exceeds the total weight of the other elements present; (c) Sintered mixtures of metal powders, heterogeneous intimate mixtures obtained by melting (other than cermets), and intermetallic compounds are classified as alloys.
(a) 'Iron and nonalloy steel' covers iron and steel containing by weight 2% or less of carbon and, except for certain specific steels, less than designated percentages of chromium, manganese, nickel, and other alloy elements. (b) 'Stainless steel' covers alloy steels containing by weight 1.2% or less of carbon and 10.5% or more of chromium, with or without other elements. (c) 'Other alloy steel' covers steels not meeting the definition of stainless steel containing specific minimum percentages of alloy elements.
In this chapter, the word 'welded' encompasses products obtained by any process of welding, including electric resistance welding, whether or not subsequently cold-drawn or cold-rolled (cold-reduced).
Tandom guides relevant to this code
Drop the Tandom Duty Calculator API into a TMS, broker software, or in-house ERP. Code samples, the response shape, and ACE reporting order, in 2026.
Open resource
Where trade compliance APIs fit in a broker's filing pipeline: HTS classification, duty calculation, AD/CVD scope match, and post-summary corrections.
Open resource
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource
A working guide to the inputs, the layers, and the math behind a US entry summary in 2026. Written for brokers, forwarders, and importer compliance teams.
Open resource
What changed April 6, 2026, what stayed the same, and how to file a steel, aluminum, or copper line in ACE without leaving duty exposure on the table.
Open resource
How to subscribe to CBP Cargo Systems Messaging Service and triage the messages that change broker filing behavior, without losing the ones that matter.
Open resource