(TNS) — Cleveland-Cliffs said Thursday it will idle a tinplate production plant in Weirton, West Virginia, impacting about 900 employees.

The Cleveland-based company, which lost a takeover bid for Pittsburgh’s U.S. Steel last fall, said the shutdown was the “direct result” of an International Trade Commission decision last week to not impose anti-dumping duties on tin mill steel from Canada, China, Germany and South Korea.

Together with its United Steelworkers union, Cliffs had petitioned for the tariffs last year, arguing they would guard against unfair trading. The duties were initially approved by the Commerce Department, but overturned last Tuesday by the ITC, which found the imports do not injure domestic steelmakers.

Cliffs said in the announcement it is maintaining 2024 sales volume guidance of 16.5 million tons of overall steel products. But Lourenco Goncalves, Cliffs’ president and CEO, said the ITC decision makes it “impossible for us to viably produce tinplate,” a type of thin rolled steel coated in tin used in food cans and other products.

“We worked very closely with our partners at the USW on this solution to save Weirton, and together fought tirelessly for its survival,” he said in a statement.

“In what was our final effort to maintain tinplate production here in America, we proved that we are forced to operate on an uneven playing field, and that the deck was stacked in favor of the importers.”

The ITC decision drew swift derision from U.S. Sen. Joe Manchin of West Virginia, who said he would continue to fight for fair competition in the steel industry and protect American manufacturers. Sen. Sherrod Brown of Ohio also opposed the decision, which he said “makes it impossible for Ohio’s tin mill industry and other domestic manufacturers to compete.”

Cliffs said it was issuing a Worker Adjustment and Retraining Notification to the impacted workers, who would be provided severance packages and relocation opportunities to other Cliffs’ facilities.