7225.40.11 - Of tool steel

This HTS category, 7225.40.11, specifically classifies flat-rolled products of other alloy steel, with a width of 600 mm or more, that are not further worked than hot-rolled and not in coils. Crucially, these products must have a thickness of 4.75 mm or more and be composed of tool steel. Tool steel is characterized by its specific alloying elements and heat treatment properties, making it suitable for applications requiring high hardness, wear resistance, and toughness, such as cutting, forming, and shaping other materials.

This particular classification distinguishes itself from its sibling category, 7225.40.30 ("Other"), by its definitive material composition. While the sibling category encompasses other alloy steels not meeting the "tool steel" criteria, 7225.40.11 is narrowly defined by the presence of tool steel. This precise material definition is paramount for accurate tariff application, reflecting the distinct metallurgical properties and often different end-uses of tool steel compared to other alloy steels.

Within this category, two subcategories exist to further refine the classification: 7225.40.11.10 for "Of high-speed steel" and 7225.40.11.80 for "Other." High-speed steel is a specific type of tool steel known for its ability to retain hardness at elevated temperatures, making it ideal for high-speed machining operations. The "Other" subcategory accounts for tool steels that do not meet the specific criteria for high-speed steel, allowing for further detailed classification of various tool steel compositions.