T11 Alloy Heat Exchanger Tube OD 31.75mm from China
Seamless ASTM A335 Grade T11 alloy steel tube, OD 31.75 mm, optimized for condensers and feedwater heaters in refining furnaces. Low alloy content provides creep resistance under thermal stress. Under 7304.59.20.40 for small OD and heat exchanger suitability.
Duty Rate — China → United States
75%
Rate breakdown
9903.82.0250%Except as provided for in headings 9903.82.14, 9903.85.67 and 9903.85.68, articles of aluminum, of steel or of copper and derivative aluminum or steel articles, as provided for in subdivisions (c)(i)–(v) of U.S. note 16 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
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
Import Tips
• Include hydrostatic test certificates proving pressure integrity for boiler applications
• Avoid bulk packaging misclassification; specify individual tube lengths on invoices