The Australian Workers' Union rejected the enterprise bargaining agreement from Alcoa Corp., and the strike will continue at the Australian operations.
Alcoa said Sept. 7 that the industrial action impacted alumina production at its Western Australian refineries by about 15,000 tonnes in August, out of the about 9 million tonnes of annual production.
The company said it has contingency plans to continue operations during the industrial action and invited the union to present an alternative proposal.
The union said 80% of its members rejected the new agreement, Reuters reported the same day.
"This decisive vote should provide Alcoa management with the impetus to come back to the table with job security assurances," Australian Workers' Union National Secretary Daniel Waltonof said.
About 1,500 workers went on strike Aug. 8 at Alcoa's operations in Western Australia, which include the Kwinana, Pinjarra and Wagerup refineries and the Darling Range project's Huntly and Willowdale bauxite mines.