7202.93.40.00 - Containing by weight less than 0.02 percent of phosphorus or sulfur or less than 0.4 percent of silicon

This HTS classification, 7202.93.40.00, specifically covers ferroniobium alloys with defined chemical compositions. It pertains to ferroalloys of niobium that contain by weight less than 0.02 percent of phosphorus or sulfur, or alternatively, less than 0.4 percent of silicon. These precise chemical limitations are critical for distinguishing this specific grade of ferroniobium from other types.

At the same level within the "Other" ferroalloys category, HTS code 7202.93.80.00 represents "Other" ferroniobium. The distinction lies in the chemical composition; this code (7202.93.40.00) is for ferroniobium that meets the stringent lower limits for phosphorus, sulfur, or silicon, whereas 7202.93.80.00 would cover ferroniobium that does not meet these specific compositional requirements.

As this is a leaf node in the HTS structure, there are no further subcategories. Therefore, the classification is determined solely by the material (ferroniobium) and its precise chemical composition as outlined in the description. Importers and exporters should carefully analyze the metallurgical composition of their ferroniobium products to ensure accurate classification under this specific HTS code.