Alcoa wants exemption from aluminum duties

Alcoa Corp, the giant US aluminum manufacturer, has asked the US Commerce Department to exclude some of its Canadian aluminum imports from tariffs.

Alcoa said there are no US aluminum producers that can meet its specifications for rolling slabs used at the company's plant in Warrick, Indiana, to produce aluminum for can manufacturers.

Alcoa filed five requests asking for waivers from the administration's 10 percent tariff on imports of the lightweight metal.