7225.40.51.30 - Of ball-bearing steel

This HTS category, 7225.40.51.30, specifically classifies flat-rolled products of other alloy steel, hot-rolled and not in coils, with a width of 600 mm or more and a thickness of less than 4.75 mm, when these products are manufactured from ball-bearing steel. Ball-bearing steel is a specialized alloy steel characterized by its high hardness, wear resistance, and ability to withstand extreme pressures, making it suitable for the manufacture of bearings.

This classification is distinct from its sibling categories. While 7225.40.51.10 covers products made from high-speed steel, which is also an alloy steel but designed for cutting tools due to its ability to retain hardness at high temperatures, this category is reserved for alloy steels specifically intended for bearing applications. The "Other" sibling category (7225.40.51.60) would encompass any other alloy steels that do not meet the criteria for ball-bearing steel or high-speed steel within this specific sub-heading.

As a leaf node within the HTS, this category does not have further subdivisions. Therefore, the key classification criteria for goods falling under 7225.40.51.30 are the material composition (specifically being ball-bearing steel), the physical form (flat-rolled, hot-rolled, not in coils, width ≥ 600 mm, thickness < 4.75 mm), and its intended use in the production of bearings.