The US-imposed tax rate on imported aluminum products is 10% and for imported steel products is 25%, with no applicable time limit.
In February 2020, US President Donald Trump extended his tax imposition under Section 232 on the national security issue of the 1962 Expanded Trade Act for a number of secondary aluminum and steel products (products that were made from aluminum and steel) imported into the United States, arguing that foreign manufacturers have evaded tariffs pursuant to Section 232.

The extended import duty under Section 232 is applied to goods imported from aluminum (wires, aluminum cables, cases ...) including HS codes: 7614.10; 7614.90; 8708.10; 8708.29 and from steel (steel nails, staples, covers, etc.), including HS codes: 7317.00; 8708.10; 8708.29.
In addition, the United States also applies waivers to some countries. Specifically, for aluminum: Arghentina, Australia, Canada. For steel: Arghentina, Brazil, Canada, Mexico and South Korea.
Section 232 of the 1962 Trade Act allowed the United States Department of Commerce to investigate whether imports were affecting US national security.
Section 232 of the 1962 Trade Act allowed the United States Department of Commerce to investigate whether imports were affecting US national security.