7305.31.60.90 - Other

This classification covers welded tubes and pipes of iron or steel, with a circular cross-section exceeding 406.4 mm in external diameter. Specifically, this category applies to longitudinally welded pipes and tubes that are not classified as being made of stainless steel. The distinguishing factor here is the material composition, focusing on alloy steels that are not primarily characterized by their chromium and nickel content, as is the case with stainless steel.

The crucial determinant for this subcategory is the presence of alloying elements beyond those found in ordinary carbon steel, but which do not qualify the material for classification as stainless steel under HTS code 7305.31.60.10. These alloy steels may contain elements such as manganese, silicon, molybdenum, vanadium, or chromium in quantities that impart specific mechanical properties, such as increased strength, hardness, or wear resistance, but without achieving the corrosion resistance characteristic of stainless steel.

As this is a leaf node in the HTS classification system, there are no further subcategories. Therefore, the classification of a product under 7305.31.60.90 hinges entirely on its specific material composition meeting the criteria for alloy steel, excluding stainless steel, and its physical characteristics matching the broader description of longitudinally welded, circular cross-section tubes and pipes of iron or steel with an external diameter exceeding 406.4 mm.