7306.90.10.00 - Of iron or nonalloy steel

This HTS category, 7306.90.10.00, encompasses "other" tubes, pipes, and hollow profiles of iron or steel that are not specifically classified elsewhere within the 7306 heading and are explicitly made of iron or nonalloy steel. This classification applies to a broad range of these metallic conduits that do not fall under more specific subheadings. Examples may include welded, riveted, or otherwise similarly closed tubular products with open seams, provided their material composition is solely iron or nonalloy steel.

It is crucial to distinguish this category from its sibling, 7306.90.50.00, which covers identical types of tubes, pipes, and hollow profiles but are manufactured from alloy steel. The primary differentiating factor for classification under 7306.90.10.00 is the absence of alloying elements beyond those typically found in standard iron or nonalloy steel, as defined by relevant metallurgical standards.

As a leaf node, this classification does not have further subdivisions. Therefore, the focus for correct classification rests on accurately identifying the material as iron or nonalloy steel and ensuring the product is indeed a tube, pipe, or hollow profile not otherwise specified within the broader 7306 heading. Customs professionals should consult material specifications and manufacturing processes to confirm the absence of significant alloying elements that would warrant classification under the "alloy steel" sibling category.