7604.10 - Of aluminum, not alloyed:

This category encompasses aluminum bars, rods, and profiles that are composed of pure aluminum, meaning they are not alloyed with other metals. These products are characterized by their specific cross-sectional shapes and lengths, and their primary constituent is aluminum with a minimal percentage of alloying elements, typically not exceeding the limits defined for "pure aluminum" within metallurgical standards. The distinction from alloyed forms is crucial for accurate classification, focusing on the absence of intentional alloying additions to enhance properties like strength or corrosion resistance.

Within the broader classification of aluminum bars, rods, and profiles, this section specifically excludes items where aluminum is intentionally mixed with other metals to create alloys. The distinction between pure aluminum and aluminum alloys is based on the composition and intended use, with pure aluminum products often favored for applications where electrical conductivity or lighter weight are paramount, and the mechanical properties of alloys are not required.

The subcategories under this heading further refine the classification based on the product's form factor. "Profiles" refer to extruded or rolled shapes with a constant cross-section, often used in construction or manufacturing. "Bars and rods" are typically solid, cylindrical or square cross-sections, distinguished by their diameter or width, serving purposes from decorative elements to structural components.