7225.40.51 - Of tool steel

This category encompasses flat-rolled products of other alloy steel, with a width of 600 mm or more, that have undergone hot-rolling but are not in coils, and possess a thickness of less than 4.75 mm, specifically designated as "of tool steel." These are specialized steel products formulated with a precise combination of alloying elements to achieve superior hardness, wear resistance, and toughness, making them suitable for the manufacture of cutting tools, dies, and other high-performance applications.

Distinguished from its sibling category, 7225.40.70.00 ("Other"), this classification is reserved for those hot-rolled, non-coiled flat-rolled products of other alloy steel that meet the specific criteria of being "of tool steel." This implies a focus on their intended end-use and material composition, rather than general alloy steel products at this thickness and form.

Within this classification, further subdivisions exist to account for the specific types of tool steel. Subcategories include "Of high-speed steel" (7225.40.51.10), characterized by its ability to retain hardness at elevated temperatures, "Of ball-bearing steel" (7225.40.51.30), known for its exceptional hardness and fatigue resistance under high loads, and "Other" (7225.40.51.60) for tool steels not falling into the preceding specialized categories.