A519 Grade 4140 Mechanical Tubing from China
ASTM A519 Grade 4140 seamless mechanical tubing, 88 mm OD with 10.2 mm wall, for machinery shafts. Classified HTS 7304.59.80.20: seamless alloy steel, circular, correct OD/wall specs. Heat-treated for high tensile strength applications.
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
• ASTM A519 material cert proves mechanical tubing specs and seamless process
• Cold-drawn finish doesn't change classification from hot-finished tubes
• Shaft end-use keeps it as tube; not shaft until machined to final form