7405.00 - Master alloys of copper:

This HTS classification, 7405.00, pertains to "Master alloys of copper." Master alloys are intermediate alloys primarily used in the production of other alloys or in foundry operations. They are typically produced by melting and alloying copper with other metallic elements in specific proportions. The primary purpose of master alloys is to introduce a significant concentration of one or more alloying elements into a base metal, facilitating more precise control and efficient incorporation during the subsequent alloying process. These materials are distinguished by their high copper content, serving as a concentrated source of the desired alloying elements for the final product.

As a category within Chapter 74, which covers copper and its articles, this classification distinguishes master alloys of copper from other copper-based products. For instance, it is separate from unwrought copper (Chapter 74.01-74.03) or copper powders (Chapter 7406), which are raw or semi-finished forms of copper, and from finished articles of copper (Chapter 74.15-74.19). The key differentiator for 7405.00 is its role as an ingredient designed for further alloying, rather than a finished product or a basic raw material for general use.

This category further subdivides based on the specific composition of the master alloy. The subcategories highlight the importance of the presence of certain elements, such as phosphorus, in determining the classification. Subheading 7405.00.10 specifically addresses master alloys containing between 5% and 15% phosphorus by weight, indicating a particular formulation for specialized applications. The residual subcategory, 7405.00.60, covers all other master alloys of copper not meeting the specific criteria of the preceding subheading. This differentiation allows for more granular tracking and statistical reporting based on the distinct characteristics and uses of various copper master alloys.