7215.50.00.90 - Containing by weight 0.6 percent or more of carbon

This HTS classification covers bars and rods of iron or nonalloy steel that have undergone cold-forming or cold-finishing processes and contain 0.6 percent or more of carbon by weight. These products are distinguished by their enhanced carbon content, which contributes to greater hardness and tensile strength compared to lower carbon steel varieties. The cold-forming or cold-finishing processes result in improved dimensional accuracy, surface finish, and mechanical properties, making them suitable for applications requiring higher performance characteristics.

The key differentiator for this category is the specific carbon threshold of 0.6 percent or more by weight. It is important to distinguish this from sibling categories that classify bars and rods with lower carbon content. For instance, "Containing by weight less than 0.25 percent of carbon" and "Containing by weight 0.25 percent or more but less than 0.6 percent of carbon" represent distinct categories with differing material properties and end-use potentials. This category specifically addresses the more robust steel grades.

As this classification is a leaf node, there are no further subcategories. Therefore, the classification hinges entirely on confirming the material composition (iron or nonalloy steel with 0.6% or more carbon) and the secondary processing (cold-formed or cold-finished). Examples of products falling under this classification might include high-strength threaded rods, precision-machined components for automotive or industrial machinery, and certain types of fasteners where superior strength and durability are paramount.