Terne plate is specifically a lead-tin alloy coating (typically 80–85% lead, 15–20% tin) applied to steel sheet, giving it superior solderability and corrosion resistance compared to pure lead coatings. For classification under this heading, both terne plate and other lead-coated steel are included, so the distinction is commercial rather than classificatory — but the mill certificate should specify the coating composition for downstream compliance documentation.

Yes. While CBP does not impose a separate admissibility hold on lead-coated steel as a raw material, downstream use in consumer products, construction, or automotive applications may trigger EPA lead-content regulations, state-level restrictions (such as California's Proposition 65), or RoHS-equivalent requirements for export markets. Importers should document the coating composition and advise customers of applicable end-use restrictions.