7178-T651 High-Toughness Alloy Plate
7178-T651 aluminum plate, 6.2 mm thick, rectangular for heavy-duty marine structures. Heat-treatable zinc alloy per statistical note 7, unclad, exactly fitting HTS 7606.12.30.91 thickness limit.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If measured thickness slightly over 6.3 mm
Precise thickness breakout separates thin sheet from thicker plate.
If cross-section ≤6 mm and called 'wire'
Chapter note limits 'wire' to ≤6 mm dimension in 7616.91.
If fabricated into ship structures
Marine vessel parts classified in Chapter 89 by vessel type.
Not sure which classification is right?
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Import Tips & Compliance
• Marine alloys need corrosion resistance specs to support industrial use
• Thickness gauging at multiple points; average determines HTS
• Declare as 'plate' not 'sheet' based on rigidity and intended stiffening role
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