The distinguishing feature is the coiled form: 7213 covers hot-rolled bars and rods presented in irregularly wound coils, which is the standard mill form for wire rod. Straight lengths, whether hot-rolled or forged, fall under 7214 regardless of diameter.

Yes. Wire rod from several countries has been subject to antidumping and countervailing duty orders at various times. Importers should verify the current scope of any orders against the specific country of origin and product specification before shipment, as scope rulings can turn on carbon content and diameter.