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Indonesia’s emergence as a major aluminium supply hub is one of the most closely watched stories in the market right now. New refineries and smelters are coming online, investment is accelerating, and the numbers being cited are significant. But the gap between announced capacity and what is actually operational is wide, and the structural constraints are real. This analysis cuts through the pipeline projections to give you a grounded picture of what is genuinely coming online, where it is going, and what could still get in the way.
What you get
Expert analysis
Original Fastmarkets research on Indonesia’s aluminium supply expansion
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14-page presentation
Published in March 2026 and presented at Fastmarkets Bauxite & Alumina 2026
10% off International Aluminium 2026
Exclusive discount code included in the report — September 15–17, Budapest
10% off International Critical Minerals & Metals Summit: Indonesia 2026
Exclusive discount code included in the report — September 27–30, Bali
What’s inside?✔ Full inventory of operational Indonesian alumina refineries and primary aluminium smelters, with current output and 2026 capacity targets✔ Indonesia’s alumina export flows in 2025, broken down by destination market✔ The 5 structural risks that could slow or derail the expansion✔ Fastmarkets’ base case forecast for Indonesian primary aluminium output to 2030✔ Exclusive 10% discount code for Fastmarkets International Aluminium 2026 and for International Critical Minerals and Metals Summit: Indonesia 2026
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