WASHINGTON—The Commerce Department has proposed a 24 percent global tariff on steel shipments coming into the U.S. and a 7.7 tariff on imported aluminum.

In April, President Donald Trump made good on a campaign promise and ordered the Commerce Department to conduct a “Section 232” review of steel imports. A provision of the Trade Expansion Act of 1962, Section 232 authorizes the gov-ernment to take action to limit imports of products if they threaten national security.

WASHINGTON—Producers in China and six other countries sold cold-rolled steel at unfairly low prices in the U.S. market and will be taxed as much as 266 percent on the price.