Norsk Hydro Faces Up to $110M Q4 Cost Impact from Gas Supply Disruptions at Alunorte Refinery

Published: Oct 08, 2026 11:31 (GMT+8)
[SMM Aluminum Express News] Norsk Hydro expects up to US$110 million Q4 cost impact from gas supply disruptions at Brazil's Alunorte alumina refinery. Norsk Hydro announced on October 5 that its 6.3 million mt/year Alunorte refinery continues to purchase natural gas at spot-market prices following disruptions to contracted deliveries from supplier CELBA in August. The company estimates a US$90–110 million cost impact in Q4 2026, following an estimated US$75–100 million impact in Q3 from higher gas costs and reduced alumina production. Alunorte temporarily reduced production to 50% in August, resulting in an estimated 100,000–120,000 mt of lost alumina output, before beginning to ramp up following a temporary gas terminal access agreement. Hydro does not currently expect further gas supply interruptions, although a long-term solution remains unresolved. The disruption therefore presents a continuing production-cost risk rather than a confirmed new reduction in alumina output, with potential implications for global alumina supply if gas availability deteriorates again.

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