7227.90.10.30 - Of ball-bearing steel

This HTS category, 7227.90.10.30, specifically classifies hot-rolled bars and rods, supplied in irregularly wound coils, made from "other alloy steel" that are *not* ball-bearing steel. The defining characteristic here is the material composition, excluding those specifically designed and treated for the demanding requirements of ball bearings. These items are generally intended for a wide range of industrial applications where the specific metallurgical properties of ball-bearing steel are not necessitated.

At this level of detail, this category is distinguished from its sibling, 7227.90.10.60, which covers all other types of alloy steel bars and rods that do not fit into this specific "of ball-bearing steel" exclusion. Therefore, when classifying, a crucial step is to determine if the alloy steel has been formulated and processed to meet the high standards of wear resistance, hardness, and dimensional stability required for ball bearings. If it does not meet these stringent criteria, it falls within this category.

As a leaf node, this classification does not have further subdivisions. The distinction is solely based on whether the alloy steel meets the specific definition and intended use of ball-bearing steel. Classification hinges on a thorough examination of the steel's composition and, where applicable, any manufacturing processes or specifications that indicate its suitability for ball bearings.