7226.11.90.30 - Of thickness not exceeding 0.25 mm

This HTS category, 7226.11.90.30, specifically classifies grain-oriented flat-rolled products of other alloy steel, less than 600 mm in width, and less than 300 mm in width, when their thickness does not exceed 0.25 mm. These are specialized steel products engineered for applications where magnetic properties are paramount, such as in the cores of transformers and other electrical equipment. The "grain-oriented" designation signifies that the steel's magnetic properties are enhanced due to a preferred orientation of the crystal structure within the material, allowing for highly efficient magnetic flux paths.

The distinction between this category and its sibling, 7226.11.90.60 ("Other"), lies in the precise thickness specification. While both fall under the broader umbrella of grain-oriented silicon electrical steel with widths under 300 mm, category 7226.11.90.30 is strictly for those with a thickness of 0.25 mm or less. This narrow thickness range is critical for optimizing electrical performance and minimizing eddy current losses in high-frequency applications.

As this node represents a leaf in the HTS classification tree, there are no further subcategories. The classification is definitive based on the material (other alloy steel, silicon electrical steel), form (flat-rolled products), width (< 600 mm and < 300 mm), magnetic property orientation (grain-oriented), and critically, the thickness not exceeding 0.25 mm. Importers and exporters must meticulously verify these physical characteristics to ensure accurate classification under this specific tariff code.