Nonalloy Steel Boiler Tube 30mm OD from China
High-temperature seamless carbon steel tube with 30mm OD designed for heat exchangers and boiler applications. Classified under HTS 7304.39.0020 due to its circular cross section, nonalloy steel composition, and OD less than 38.1mm, excluding cast iron and precision tubes. Meets ASTM A179 specifications for cold-drawn seamless tubing.
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
• Provide heat treatment records showing normalized or annealed condition required for boiler service
• Confirm minimum wall thickness meets pressure vessel code requirements (ASME BPVC)
• Avoid common pitfall of declaring as 'alloy steel' - requires documented max 1.65% Mn and 0.6% other elements