On June 6, Industry Minister Mélanie Joly spoke to steelworkers at ArcelorMittal Dofasco, a separate Hamilton plant, saying the federal government will work to prevent layoffs and stop steel dumping.

Steelmaker ArcelorMittal SA is closing its wire drawing mill in Ontario, affecting 153 employees when Canada’s steel industry is grappling with the impacts of US tariffs on the metal.

Reuters FILE PHOTO: Steel coils and a flag of Canada are seen in the factory at the ArcelorMittal Dofasco steel mill in Hamilton, Ontario, Canada March 12, 2025. REUTERS/Carlos Osorio/ File Photo ...

Steel coils and a flag of Canada are seen in the factory before Canada's Prime Minister-designate Mark Carney visits the ArcelorMittal Dofasco steel mill in Hamilton, Ontario, Canada March 12, 2025.