Alloy Steel Heat Exchanger Tubing from Mexico
U-bent or straight tubes from Alloy 800H/825 for shell-and-tube heat exchangers in chemical processing. Classified 7306.90.5000 as other alloy steel tubes excluding boiler/precision types.
Duty Rate — Mexico → 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
9903.05.900%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 B407/B424 material certs with U-bend radius documentation required
• Specify finned or bare tube status for valuation accuracy
• CVD risk on Ni-bearing alloys; full chemical analysis needed