7211.23 - Containing by weight less than 0.25 percent of carbon:

This HTS category, 7211.23, encompasses flat-rolled products of iron or non-alloy steel that measure less than 600 mm in width and have undergone cold-rolling (cold-reduction). Crucially, these products are characterized by their low carbon content, containing less than 0.25 percent by weight. This distinction is paramount for proper classification, separating them from steels with higher carbon levels.

Within the scope of cold-rolled flat-rolled products of iron or non-alloy steel, this specific heading differentiates itself from its sibling category, 7211.29 ("Other"). While 7211.29 would cover cold-rolled products with carbon content of 0.25 percent or greater, 7211.23 exclusively pertains to those with a carbon content below this threshold. This precise carbon content determination is a key differentiator for accurate tariff application.

The subdivisions within 7211.23 further refine the classification based on the dimensions of the rolled product. Specifically, there are subcategories designed to distinguish between products of a width of less than 300 mm and "Other" products, which would encompass those with a width between 300 mm and 600 mm but still meeting the low carbon criteria and cold-rolled state. This granular approach ensures that specific product dimensions are taken into account for detailed trade reporting and duty assessment.