ASTM A519 4140 Seamless Mechanical Tubing from China
4140 chrome-moly seamless mechanical tubing, 100mm OD x 16mm wall, for machinery shafts and axles. Falls under HTS 7304.59.80.25 as other seamless alloy steel tubes with wall thickness exceeding 12.7mm and OD 38.1-114.3mm. Offers excellent strength for heavy equipment components.
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
• Specify mechanical tubing vs pressure tubing in commercial invoice to prevent boiler tube assumptions
• Document surface condition (hot finished vs cold drawn) as it affects alternative classifications