7304.59.80.35/SA-335 Grade P11 Seamless Alloy Steel Pipe/China

SA-335 Grade P11 Seamless Alloy Steel Pipe from China

This seamless pipe made from chromium-molybdenum alloy steel (Grade P11) has an outside diameter of 152.4 mm and wall thickness of 15 mm, designed for high-temperature service in power plants and refineries. It falls under HTS 7304.59.80.35 due to its circular cross-section, alloy steel composition, OD between 114.3-190.5 mm, and specified wall thickness range. These pipes are produced via hot-finished or cold-drawn processes without welding.

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

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Import Tips

• Obtain mill test certificates (MTC) verifying chemical composition, mechanical properties, and seamless production to comply with ASTM A335 standards

• Ensure proper marking of grade, heat number, and dimensions per ASME B36.10M to avoid reclassification during customs exam

• Declare exact OD and wall thickness measurements; minor variances can shift to adjacent statistical suffixes