7304.39.00.04/ASTM A179 Carbon Steel Boiler Tube/Japan

ASTM A179 Carbon Steel Boiler Tube from Japan

Seamless carbon steel tube designed for use in heat exchangers and boilers, with an outside diameter of 50 mm, meeting ASTM A179 specifications for low-carbon steel suitable for bending and flanging. It falls under HTS 7304.39.0004 due to its seamless construction, circular cross-section between 38.1 mm and 190.5 mm OD, and explicit suitability for boilers and heat exchangers. These tubes are critical for high-pressure steam and water applications in industrial settings.

Duty Rate — Japan → United States

50%

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

9903.03.060%Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter

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Import Tips

• Obtain mill test certificates verifying seamless construction, chemical composition, and mechanical properties per ASTM standards to ensure compliance

• Confirm outside diameter measurement between 38.1-190.5 mm with precise caliper documentation to match statistical suffix

• Include end-use certification proving suitability for boilers or heat exchangers, as general steel tubes classify elsewhere