7306.40.10.10 - Containing more than 1.5 percent but less than 5 percent by weight of molybdenum

This HTS category, 7306.40.10.10, specifically classifies welded tubes, pipes, and hollow profiles of iron or steel that are of a circular cross-section, made of stainless steel, and have a wall thickness less than 1.65 mm. The defining characteristic for this particular subclassification is that these stainless steel items contain more than 0.5 percent by weight of nickel and, crucially, also contain between 1.5 percent and 5 percent, inclusive, by weight of molybdenum.

Distinguishing this category from its sibling, 7306.40.10.15 ("Other"), is the precise chemical composition. While both are welded, circular stainless steel tubes with thin walls and containing nickel, 7306.40.10.10 is further refined by the presence of molybdenum within a specific weight percentage range. The sibling category would encompass stainless steel tubes with nickel but either no molybdenum, or molybdenum outside of the 1.5% to 5% range, or potentially other stainless steel compositions not meeting the molybdenum criteria.

As this is a leaf node in the HTS structure, there are no further subcategories. Therefore, the classification is definitively determined by the combination of being a welded, circular stainless steel tube with a wall thickness under 1.65 mm, containing over 0.5% nickel, and specifically having between 1.5% and 5% molybdenum by weight. Importers and exporters should carefully verify the precise molybdenum content to ensure correct classification within this specific subhead.