7229.20.00 - Of silico-manganese steel

This category specifically covers wire made from silico-manganese steel. Silico-manganese steel is a type of alloy steel characterized by the presence of silicon and manganese as key alloying elements, which impart specific properties like increased strength, hardness, and elasticity. Therefore, any steel wire meeting these material composition requirements, regardless of its form or intended use, will fall under this classification.

This designation distinguishes it from its sibling category, 7229.90, which encompasses "Other" wire of alloy steel not specifically classified elsewhere within the 7229 heading. Consequently, if a wire is of alloy steel but does not meet the precise composition criteria for silico-manganese steel, it would be directed to the "Other" subcategory.

Within this silico-manganese steel wire classification, two subcategories exist to further refine the classification based on specific physical characteristics and material composition. The first subcategory pertains to round wire meeting precise diameter, carbon, manganese, and silicon content thresholds, specifically designed for electric arc welding. The second subcategory, 7229.20.00.90, acts as a residual classification for all other silico-manganese steel wires that do not fit the detailed specifications of the first subcategory.