2620.99.20.00 - Containing mainly tungsten 🖩

This HTS subcategory, 2620.99.20.00, specifically covers slag, ash, and residues (excluding those from the manufacture of iron or steel) that predominantly contain tungsten compounds. These materials are derived from various industrial processes and are classified here when tungsten is the primary metallic constituent. This designation is crucial for accurately determining import duties and regulatory requirements for these specialized industrial by-products.

The primary distinction of this category lies in its focus on tungsten as the main metallic element. It differentiates from sibling categories such as 2620.99.10.00, which covers materials containing mainly vanadium, and 2620.99.30.00, which pertains to residues with over 10 percent nickel. While other sibling categories address specific compositions or purposes, 2620.99.20.00 is defined by the principal presence of tungsten, regardless of whether further recovery of other metals like copper, lead, or zinc is intended, as long as tungsten remains the predominant component.

As a leaf node within the HTS structure, this category represents the most specific classification for these tungsten-rich residues. There are no further subcategories; therefore, the classification hinges entirely on the presence of tungsten as the main metallic content, distinguishing it from other slag, ash, and residue classifications within heading 2620. For practical purposes, classification professionals should confirm the predominant metallic content through assay results or other verifiable documentation.