Alloy Steel Square Hollow Structural Section 100x100x6mm
Welded square tube of alloy steel with 100mm x 100mm outer dimensions and 6mm wall thickness, used in structural frameworks for buildings and machinery. Classified under HTS 7306.61.30.00 as a welded, noncircular (square cross-section) tube of alloy steel with wall thickness over 4mm. Meets chapter definition for other tubes and hollow profiles.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If wall thickness under 4mm
Thinner walls shift to other square/rectangular welded alloy steel tubes in the same heading but different subheading.
If circular cross-section
Circular welded alloy tubes fall under different cross-section category in heading 7304.
If made of carbon steel instead of alloy
Material change from alloy to non-alloy steel moves to heading 7306.50 for other steel tubes.
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Import Tips & Compliance
• Verify alloy steel composition meets ASTM A500 Grade C or equivalent for classification; provide mill test certificates showing wall thickness ≥4mm
• Ensure weld seam inspection reports to avoid reclassification as seamless
• Common pitfall: insufficient documentation on noncircular cross-section
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