7604.29.30 - Having a round cross section

This category encompasses aluminum alloy bars and rods that possess a round cross-section. These are distinct from extruded aluminum profiles, which typically have more complex shapes. The classification of these round bars and rods is based on their composition and specific characteristics, particularly whether they are made from heat-treatable alloys.

While the sibling category 7604.29.50 covers "Other" bars and rods within this "Of aluminum alloys: Other" grouping, this specific code (7604.29.30) focuses exclusively on those with a round profile. The distinction is purely based on the geometric shape of the cross-section, differentiating it from other bar and rod forms that might fall under the broader "Other" sibling.

The subcategories within 7604.29.30 further refine the classification of these round aluminum alloy bars and rods based on their metallurgical properties. These subdivisions cater to specific types of heat-treatable alloys, including high-strength variants and general industrial heat-treatable alloys, as detailed in the relevant statistical notes to Chapter 76. This granular breakdown ensures accurate tariff application based on the technical specifications of the alloys.