7403.22.00.00 - Copper-tin base alloys (bronze)

This HTS category, 7403.22.00.00, specifically covers unwrought copper alloys where tin is the principal alloying element, commonly known as bronze. These materials are typically in forms such as ingots, pigs, blocks, or cakes, and are not further worked beyond casting or initial smelting processes. The defining characteristic of this classification is the presence of copper as the base metal, with tin being the predominant alloying metal, conferring distinct properties to the alloy.

This classification is distinguished from its sibling categories by its specific elemental composition. While 7403.21.00.00 covers copper-zinc base alloys (brass), and 7403.29.01 encompasses all other copper alloys not specifically listed, 7403.22.00.00 isolates bronze alloys based on the primary role of tin. This distinction is crucial for accurate tariff assessment and ensures that bronzes are not misclassified with brass or other mixed copper alloys.

As a leaf node, this category does not have further subdivisions. Therefore, the focus for classification purposes remains on identifying the unwrought form of the material and confirming that it is a copper-tin base alloy. Practical classification will involve examining the chemical composition analysis and the physical form of the imported or exported commodity to ensure it aligns with the definition of bronze in an unwrought state.