Unwrought nickel covers primary forms — cathodes, pellets, briquettes, ingots, and similar shapes that have not been worked beyond casting or basic forming. Once the metal has been rolled into sheet, drawn into wire, or otherwise mechanically worked, it moves to the headings covering bars, rods, plates, or other wrought forms.

Yes. Unalloyed nickel (750210) and nickel alloys (750220) carry separate tariff lines with potentially different duty rates and trade-remedy exposure. Importers should confirm the alloy content of the material against the applicable specification, as misclassification between the two subheadings is a common audit finding.