Dutch bank ABN Amro forecasts yellow metal prices under the Republican presidential candidate vs Hillary Clinton.
The US$55mn transaction is still subject to regulatory approvals.
The new cut and bend unit will join two other plants in a Santo Domingo metallurgical complex.
The International Copper Study Group said the global refined market for the first four months of the year had a production deficit of 129,000t.
The steel producer saw lower sales but higher exports.
The yellow metal rebounds after recent losses despite a stable US dollar and stock market strength.
A definitive anti-dumping duty has been applied to seamless, unalloyed carbon steel tubes from the Asian nation.