5456-H321 Aluminum Alloy Shipbuilding Plate from China
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 — China → United States
78%
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
• 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