7306.61.50.00 - Of iron or nonalloy steel

This HTS category, 7306.61.50.00, specifically classifies welded tubes, pipes, and hollow profiles of iron or nonalloy steel that have a square or rectangular cross-section and a wall thickness of less than 4 mm. These are typically formed by shaping flat-rolled steel into the desired cross-section and then welding the seam. Examples include structural framing elements, conduit, and decorative profiles used in construction, furniture, and various manufacturing applications. The defining characteristics are the noncircular, specifically square or rectangular, shape, the welded construction method, the base metal being iron or nonalloy steel, and the critical wall thickness criterion.

It is important to distinguish this classification from its sibling category, 7306.61.70. While both cover welded tubes and pipes of square or rectangular cross-section with a wall thickness of less than 4 mm, the sibling category is reserved for those made of alloy steel. This distinction is based on the material composition, where the presence of specific alloying elements beyond those found in nonalloy steel triggers classification under the alloy steel category. Therefore, the absence of significant alloying elements is the key differentiator for goods falling under 7306.61.50.00.

As this is a leaf node within the HTS, there are no further subcategories that further subdivide these goods. Classification at this level is final, based on the established criteria of material (iron or nonalloy steel), construction (welded), cross-section (square or rectangular), and wall thickness (less than 4 mm). Any goods meeting all these specific requirements, and not meeting the criteria for alloy steel, will be classified here.