Cold-rolled coil undergoes additional rolling at room temperature after hot-rolling, producing tighter thickness tolerances, a smoother surface, and improved mechanical properties. This additional processing places it in a separate classification heading from hot-rolled coil, and it is subject to distinct antidumping and countervailing duty order scopes — meaning the applicable trade remedies and duty rates can differ significantly even for the same country of origin.

Mill test certificates should confirm the production route (hot-rolled substrate, cold-reduction ratio, and final annealing or skin-pass treatment) without any coating or plating step. If the coil has been electrolytically or hot-dip coated, it reclassifies into a coated-steel heading, which carries different duty rates and may fall under separate trade-remedy orders.