7409.39.10 - Of a thickness of 5 mm or more

This classification pertains to plates, sheets, and strip made from copper-tin base alloys, commonly known as bronze. Specifically, it covers articles within this material group that have a thickness of 5 millimeters or more. These are substantial pieces of bronze, designed for applications requiring rigidity, strength, and corrosion resistance.

It is crucial to distinguish this category from its sibling, "Of a thickness of less than 5 mm." The defining characteristic for classification here is the physical dimension of thickness. Items falling under this code are significantly thicker than those classified under the sibling category, impacting their intended use and physical properties.

Within this classification, further distinctions are made to refine the categorization based on specific bronze compositions. The subcategories provided, "Of phosphor bronze" and "Other," allow for a more granular classification. Phosphor bronze, a specific type of copper-tin alloy with added phosphorus, possesses enhanced mechanical properties. The "Other" subcategory captures all remaining copper-tin base alloy plates, sheets, and strip of 5 mm or greater thickness that do not specifically qualify as phosphor bronze.