Harmonized System
U.S. imports of Welded Square & Rectangular Cross-Section Iron or Steel Tubes & Pipes (HS 730661) totaled $65.4M in August 2026, imported from 37 countries.
Importers of Welded Square & Rectangular Cross-Section Iron or Steel Tubes & Pipes paid $32.2M in duties in August 2026, an average duty rate of 49.30% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Welded Square & Rectangular Cross-Section Iron or Steel Tubes & Pipes imports of $65.4M in August 2026 ran 31% above the year-to-date monthly average of $50.0M.
Last updated: August 2026 dataStructural hollow sections with square or rectangular profiles are widely used in construction, fabricated metal structures, and mechanical framing — making classification precision under this heading commercially significant. The US tariff lines differentiate by wall thickness (the 4 mm threshold separates 7306611000 and 7306613000 from 7306615000 and related lines), by steel type (iron/non-alloy, alloy, and stainless), and by cross-section shape (square vs. rectangular). Canada and Mexico are the leading suppliers, with South Korea and Taiwan also prominent sources. Section 232 tariffs apply to steel imports generally, and USMCA origin qualification is a routine consideration for North American supply chains.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
5.2K import shipments a month
The heading covers both square and rectangular cross-sections, but the US tariff lines distinguish them: for example, 7306612500 covers square cross-section products of iron or non-alloy steel, while 7306611000 covers rectangular (and square) profiles with wall thickness at or above 4 mm. Importers should confirm exact cross-section geometry and wall thickness before classification.
Yes — 7306617030 specifically covers welded square or rectangular cross-section tubes with wall thickness under 4 mm of stainless steel, while 7306617060 covers the equivalent in non-stainless alloy steel. Stainless square tubing is therefore classified here rather than under the circular stainless tube headings.
Subheading 2 of 10 in heading 7306
Subheading 730661 · $65.4M of $283.0M
Trade Directory
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7306611000 | Oth Tub, Pip, NESOI, Wld, Sq/Rec Cs, Th>=4mm, Ir/Nnalloy | $40.0M | 49.96% | 99.92% | $20.0M |
| 7306615000 | Oth Tub, Pip, NESOI, Wld, Sq/Rec Cs, Th<4mm, Irn/Nnalloy | $16.0M | 48.25% | 98.73% | $7.7M |
| 7306613000 | Oth Tube, Pipe, NESOI, Weld, Sqr/Rec Cs, Thk>=4mm, Alloy | $4.7M | 46.59% | 99.92% | $2.2M |
| 7306617030 | Oth Tub, Pip, NESOI, Weld, Sq/Rec Cs, Thk<4mm, Stainless | $3.6M | 50.15% | 99.88% | $1.8M |
| 7306617060 | Oth Tub, Pip, NESOI, Weld, Sq/Rec Cs, Th<4mm, Aly Nt Stn | $960K | 49.45% | 99.74% | $475K |
Oth Tub, Pip, NESOI, Wld, Sq/Rec Cs, Th>=4mm, Ir/Nnalloy
Oth Tub, Pip, NESOI, Wld, Sq/Rec Cs, Th<4mm, Irn/Nnalloy
Oth Tub, Pip, NESOI, Weld, Sq/Rec Cs, Th<4mm, Aly Nt Stn
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7306612500 | Oth Pipe Tb Hp, Wld, Square Cs, Irn or Nonally Steel | $10.1M |
| 7306616500 | Oth Pipes Tb Hp, Wld, Square Cs, Alloy Steel | $1.5M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$65.4MYoY · free account
Exports
$11.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $536.9M of Welded Square & Rectangular Cross-Section Iron or Steel Tubes & Pipes and exported $125.2M.
Imports · August 2026
origin
Canada and Mexico together supply 71% of it.
Through August 2026. Source: U.S. Census Bureau.
customs district
entry
rate provision · imports
0.4% enters free of duty; duty collected equals 49.30% of imports for consumption.