Seamless Steel Structural Hollow Section 16-inch OD 20mm Wall from China
Circular seamless hollow structural section (HSS) of nonalloy steel, 16-inch (406.4 mm but exceeding in variants) OD and 20 mm wall for building columns. HTS 7304.39.0080 applies to these large, thick-walled seamless profiles of circular cross-section. Used in high-rise construction.
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
• Certify to ASTM A500 or A1085 for structural use; non-certified may face engineering rejection
• Measure wall precisely post-manufacture; thinning during production can drop below 19mm
• Declare as 'hollow profiles' if marketed for structures to align with notes