The United States will impose 50 percent tariffs on copper imports starting Friday, as announced by President Donald Trump. 

The White House released a fact sheet on the tariffs Wednesday, saying Trump signed a proclamation to address the effects of copper imports on national security. 

According to the fact sheet, the 50 percent rate will apply to imports of semi-finished copper products such as copper pipes, wires, rods, sheets and tubes, and to copper-intensive derivative products such as pipe fittings, cables, connectors and electrical components.

The tariffs apply to the copper content of a product, while the non-copper content remains subject to reciprocal tariffs or other duties. 

The White House said copper input materials and copper scrap are not subject to the 50 percent tariffs or reciprocal tariffs.