Alloy Steel Hydraulic Cylinder Tube from China
Seamless tube made of alloy steel, such as 4140 grade, with wall thickness under 4 mm, used in manufacturing hydraulic and pneumatic cylinders. It falls under HTS 7304.90.70.00 as a seamless hollow profile of alloy steel with thin walls. These tubes are precision-honed inside for piston rod sealing.
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
• Verify alloy steel composition via mill test certificate (MTC) to confirm classification under 7304, avoiding reclassification to carbon steel headings
• Ensure wall thickness documentation <4 mm; ultrasound gauging reports prevent disputes at customs