Alcoa Australia to cut Portland aluminium smelter output to 75% capacity

The Australian unit of US aluminium producer Alcoa Corp said on Wednesday output at its Portland smelter in Victoria would be reduced to about 75% of its total capacity of 358 000 metric tonnes per year, citing instability and production challenges.

Australia's Alumina owns a 40% stake in Alcoa Australia, which holds a 55% stake in the Portland Aluminium joint venture.