Alloy Steel Structural Hollow Section
Seamless thick-walled circular hollow section from alloy steel, 159 mm OD, 20 mm wall, for structural columns in heavy construction. HTS 7304.59.80.40 for seamless alloy tube specs.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If welded rectangular profile
Welded structural hollow sections use 7306 square/rectangular headings.
If machined mounting brackets
Fabricated structural assemblies become 7308 other structures.
If thinner wall <19 mm
Same size but thinner structural tubes have separate thickness breakout.
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Import Tips & Compliance
• Certify minimum yield strength (e.g
• 80 ksi) for structural approval
• Confirm circular profile; square/rectangular sections classify under 7306.61
• Specify building code compliance (AISC/ASTM) on commercial invoice
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