G90 Hot-Dip Galvanized Lockforming Quality
Heavy G90 zinc-coated galvanized sheet >600 mm wide, grade LF for HVAC lock-seam ductwork. HTS 7210.49.00 other zinc-plated nonalloy steel flat products. High coating for forming without cracking.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If heavier zinc coating >275 g/m²
Specific heavy electrolytic zinc plating weights detail under 7210.42 statistical breaks.
If bent into tube/pipe
Formed lockseam pipe classifies as welded tube under 7307, not flat sheet.
If hoop/strip form <600 mm
Galvanized hoops/strips narrower than 600 mm go to 7215 other flat products.
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Import Tips & Compliance
• Lockforming grade certs essential; standard commercial steel fails formability tests
• G90 declaration (0.90 oz/ft²) critical—under/over risks yield point misclassification
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