7505.21 - Of nickel, not alloyed:

This category, HTS 7505.21, specifically covers wire made from nickel that is not alloyed. This means the wire must be composed primarily of pure nickel, with minimal or no other metallic elements intentionally added to alter its properties. Products classified here are typically used in applications where the inherent characteristics of pure nickel, such as its corrosion resistance and high melting point, are paramount.

It is crucial to distinguish this category from its sibling, HTS 7505.22, which covers wire made from nickel alloys. While both fall under the broader classification of nickel wire, the key differentiator for 7505.21 is the absence of alloying elements, whereas 7505.22 encompasses wire where nickel is mixed with other metals to create specific performance characteristics.

Within HTS 7505.21, further subdivisions exist to refine the classification based on the manufacturing process. The subcategories, 7505.21.10.00 (Cold-formed) and 7505.21.50.00 (Not cold-formed), differentiate between wire that has undergone deformation at or near room temperature and those that have not. This distinction is important for understanding the physical properties and potential end-uses of the wire.