5456-H321 Aluminum Alloy Shipbuilding Plate from Mexico
5456-H321 weldable alloy plate exceeding 6.3 mm for hull plating in marine vessels. HTS 7606.92.3025 covers this unclad alloy due to magnesium/chromium composition exceeding pure aluminum limits.
Duty Rate — Mexico → United States
13%
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
Import Tips
• Document temper and alloy for MFN duty rate application
• Measure thickness at thinnest point to confirm >6.3 mm
• Beware of reclassification if cut to custom sizes post-import