The president's proclamation imposes a 50 per cent tariff on semi-finished copper products and other products that copper is heavily used to manufacture. The move is essentially a boost to Chile and Peru,

The United States will impose a 50 per cent tariff on copper pipes and wiring, President Donald Trump said on Wednesday, but details of the levy fell short of the sweeping restrictions expected and left out copper input materials such as ores,

BEIJING/LONDON (Reuters) -Proposed limits on U.S. scrap copper exports which aim to reduce reliance on overseas production of the metal, are unlikely to have much impact, analysts say, with exports already below the planned cap.