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HSChapter 73
U.S. imports of welded square & rectangular cross-section iron or steel tubes & pipes (HS 730661) totaled $49.8M in April 2026, traded with 31 countries.
Importers of Welded Square & Rectangular Cross-Section Iron or Steel Tubes & Pipes paid $24.4M in duties in April 2026 — an effective duty rate of 49% on $49.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Welded Square & Rectangular Cross-Section Iron or Steel Tubes & Pipes imports of $49.8M in April 2026 ran 14% above the year-to-date monthly average of $43.5M.
Last updated: April 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.
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.
Monthly import values over time
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CANADA | $27.2M | $2.3M | -$24.9M |
| MEXICO | $10.7M | $6.6M | -$4.1M |
| TAIWAN | $3.0M | -- | -$3.0M |
| VIETNAM | $2.5M | $40K | -$2.5M |
| KOREA, SOUTH | $1.7M | $24K | -$1.7M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7306611000 | OTH TUB,PIP,NESOI,WLD,SQ/REC CS,TH>=4MM,IR/NNALLOY | $28.3M | 50.06% | $14.2M |
| 7306615000 | OTH TUB,PIP,NESOI,WLD,SQ/REC CS,TH<4MM,IRN/NNALLOY | $14.3M | 48.95% | $6.9M |
| 7306613000 | OTH TUBE,PIPE,NESOI,WELD,SQR/REC CS,THK>=4MM,ALLOY | $3.4M | 48.86% | $1.6M |
| 7306617030 | OTH TUB,PIP,NESOI,WELD,SQ/REC CS,THK<4MM,STAINLESS | $3.2M | 46.04% | $1.5M |
| 7306617060 | OTH TUB,PIP,NESOI,WELD,SQ/REC CS,TH<4MM,ALY NT STN | $529K | 40.00% | $212K |
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 TUBE,PIPE,NESOI,WELD,SQR/REC CS,THK>=4MM,ALLOY
OTH TUB,PIP,NESOI,WELD,SQ/REC CS,THK<4MM,STAINLESS
OTH TUB,PIP,NESOI,WELD,SQ/REC CS,TH<4MM,ALY NT STN
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7306612500 | OTH PIPE TB HP,WLD,SQUARE CS,IRN OR NONALLY STEEL | $7.9M |
| 7306616500 | OTH PIPES TB HP, WLD, SQUARE CS, ALLOY STEEL | $1.7M |
OTH PIPE TB HP,WLD,SQUARE CS,IRN OR NONALLY STEEL
3.6M kg
OTH PIPES TB HP, WLD, SQUARE CS, ALLOY STEEL
640.5K kg
ARTICLES OF IRON OR STEEL NESOI
HS 732690
STRUCTURES AND PARTS NESOI OF IRON OR STEEL
HS 730890
THREADED SCREWS AND BOLTS NESOI OF IRON OR STEEL
HS 731815
COOKING APPLIANCES ETC FOR GAS FUEL, IRON OR STEEL
HS 732111
NUTS OF IRON OR STEEL
HS 731816
TABLE, KITCHEN ETC ARTICLES & PTS, STAINLESS STEEL
HS 732393
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $10.4M | $1.4M | -$9.0M |
| California | $4.8M | $1.7M | -$3.1M |
| Michigan | $4.5M | $326K | -$4.2M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| DETROIT, MI | $20.9M | $594K | -$20.3M |
| LAREDO, TX | $9.1M | $3.7M | -$5.4M |
| LOS ANGELES, CA | $3.8M | -- | -$3.8M |