Alloy Steel Square Hollow Structural Section 100x100x6mm from China
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.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• 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