Brazil's primary aluminum output in January-May reached 331,900t, up 2.6% year-on-year, according to data from industry association Abal.
Primary aluminum output in May rose 1.6% from the same month last year to 68,300t, the 13th consecutive monthly increase.
For full-year 2016, output totaled 792,700t.
Abal is comprised by CBA, part of local conglomerate Votorantim, as well as Alcoa, BHP, Albras and Novelis.
Ranked ninth among the world's largest aluminum producers, Brazil has slipped several places over the past few years in the global upstream segment. However, it is still a major player with an integrated chain that includes bauxite mining, alumina refining and primary aluminum production.