What is the U.S. tariff rate on steel pipe and tube?

USITC calculated duties imply an effective rate of 43.01% in Jun 2026 (calculated duties ÷ covered customs value, USITC DataWeb). The parseable Column 1 General line-rate range is 0%; individual lines are called “Free” only when the official General field is literally Free, and product, origin, preference and tariff mix can contribute to the observed-rate difference.

What are the statutory MFN line rates for steel pipe and tube?

The parseable Column 1 General line-rate range is 0% across the family's 78 eight-digit HTS lines in the 2026 Harmonized Tariff Schedule (headings 7304, 7305, 7306). “Free” means the official General field is literally Free for a line; it does not determine final entry liability.

Which countries supply the most steel pipe and tube to the U.S.?

Top retained sources in 2025: South Korea ($1.1B at 25.49%), Canada ($901.6M at 20.65%), Mexico ($652.4M at 23.22%). South Korea holds 16.2% of total family import customs value. Retained sources cover 74.3%; their HHI is 710, a lower bound whose floor falls in the diversified range without classifying the omitted tail.

How much steel pipe and tube does the U.S. import?

$6.9B of customs value in 2025, with $1.8B in USITC Calculated Duties — an effective calculated-duty rate of 25.63%.

Is the U.S. a net importer of steel pipe and tube?

Yes — a net importer in 2025: $6.9B imported vs $1.1B exported (exports are 15% of imports).

What is the customs unit value of steel pipe and tube?

$1.51/kg in 2025, derived as customs value ÷ reported quantity from USITC DataWeb. It is an aggregate across the family's product and origin mix, not a transaction price or supplier quote.

Tariff monitor · Metals & Mill Products

Steel Pipe and Tube: Statutory & Effective Tariff Rates

USITC Column 1 General rates for 78 steel pipe and tube HTS lines (parseable range 0%). Effective rate Jun 2026: 43.01%; monthly history since 2014.

The short answer

The observed effective calculated-duty rate on U.S. imports of steel pipe and tube was 43.01% in Jun 2026, up from 36.88% a year earlier — USITC Calculated Duties divided by covered customs value. The Column 1 General line-rate range is 0% across 78 HTS lines in the 2026 schedule; individual lines are called “Free” only when the official General field is literally Free, which still does not determine a shipment’s final duty. South Korea is the largest source, holding 16.2% of 2025 imports.

Statutory rates from the schedule

Seamless and welded steel pipe and tube, from process piping to mechanical tubing. This family covers HTS headings 7304, 7305, 7306: 78 eight-digit rate lines with a parseable Column 1 General range of 0% in the 2026 schedule. “Free” means the official General field is literally Free for that line; it does not determine final entry liability.
Chapter 99 references on individual lines (for example, 9903.90.09) identify provisions to review; applicability and any additional duty depend on the entry facts.

Observed calculated-duty data

Latest month on record (2026-06): 43.01% effective on $521.4M of imports, versus 36.88% in the same month a year earlier. The monthly archive holds 150 observations from 2014-01 through 2026-06.
In 2025, U.S. imports for consumption in this family totaled $6.9B in customs value, with $1.8B in USITC reported calculated duty on $6.9B of covered customs value: an effective calculated-duty rate of 25.63%. The aggregate reflects the recorded entry mix but does not attribute the result to a specific legal provision.
A year earlier the effective calculated-duty rate was 4.68%, so the observed rate rose 20.9 points.
Top source countries in 2025: South Korea ($1.1B at 25.49%), Canada ($901.6M at 20.65%), Mexico ($652.4M at 23.22%), Germany ($460.1M at 23.04%), Japan ($399.9M at 20.12%).
Reported freight and insurance equaled 9.62% of covered customs value in 2025 ($495.4M total); charge coverage was 74.3% of customs value, from USITC DataWeb. It is shown alongside the effective calculated-duty rate and is not part of the customs-value duty base.
Customs unit value: 1.5067 per kg in 2025, aggregate declared customs value divided by reported quantity across eligible single-unit lines (USITC DataWeb); not a transaction price.

Representative rate lines

7304.11.00: Of stainless steel · MFN Free
7304.19.10: Of iron or nonalloy steel · MFN Free
7304.19.50: Of other alloy steel · MFN Free
7304.22.00: Drill pipe of stainless steel · MFN Free
7304.23.30.00: Of iron or nonalloy steel · MFN Free
7304.23.60: Of alloy steel · MFN Free
7304.24.30: Threaded or coupled · MFN Free
7304.24.40: Other · MFN Free

Frequently asked questions

What is the U.S. tariff rate on steel pipe and tube? USITC calculated duties imply an effective rate of 43.01% in Jun 2026 (calculated duties ÷ covered customs value, USITC DataWeb). The parseable Column 1 General line-rate range is 0%; individual lines are called “Free” only when the official General field is literally Free, and product, origin, preference and tariff mix can contribute to the observed-rate difference.
What are the statutory MFN line rates for steel pipe and tube? The parseable Column 1 General line-rate range is 0% across the family's 78 eight-digit HTS lines in the 2026 Harmonized Tariff Schedule (headings 7304, 7305, 7306). “Free” means the official General field is literally Free for a line; it does not determine final entry liability.
Which countries supply the most steel pipe and tube to the U.S.? Top retained sources in 2025: South Korea ($1.1B at 25.49%), Canada ($901.6M at 20.65%), Mexico ($652.4M at 23.22%). South Korea holds 16.2% of total family import customs value. Retained sources cover 74.3%; their HHI is 710, a lower bound whose floor falls in the diversified range without classifying the omitted tail.
How much steel pipe and tube does the U.S. import? $6.9B of customs value in 2025, with $1.8B in USITC Calculated Duties — an effective calculated-duty rate of 25.63%.
Is the U.S. a net importer of steel pipe and tube? Yes — a net importer in 2025: $6.9B imported vs $1.1B exported (exports are 15% of imports).
What is the customs unit value of steel pipe and tube? $1.51/kg in 2025, derived as customs value ÷ reported quantity from USITC DataWeb. It is an aggregate across the family's product and origin mix, not a transaction price or supplier quote.

About this data

Reference statistics derived from USITC published data. Not a customs ruling. MFN-Free and Special-rate fields describe statutory line coverage only; final entry liability requires origin, date, eligibility, exclusions and other transaction facts. Calculated Duties are statistical estimates, not a cash-collections ledger. Confirm classification, origin, program eligibility, and final entry liability with a licensed customs broker.

Last reviewed 2026-08-31.