Century Nordural Aluminium Restart Moves Ahead After Iceland Potline Outage

Century Nordural aluminium

Century Nordural aluminium restart has begun at the company’s Grundartangi smelter in Iceland after an electrical equipment failure halted production on the second potline in October. Century Aluminum said the first pots have been energised and the remaining pots will be restarted on an accelerated schedule.

The Century Nordural aluminium restart is expected to bring the second potline close to full production by the end of July. The restart follows repairs to failed transformers, which are scheduled to be replaced with new units later this year.

Century Nordural aluminium restart timing is important because the global aluminium market remains sensitive to smelter outages, power reliability and regional supply disruptions. Any faster-than-expected return of capacity can ease some pressure on primary aluminium availability.

Century had previously expected to restart the second potline by the end of April and return to near full production by the end of July. The early restart suggests the repair programme is progressing ahead of schedule.

Iceland Smelter Recovery Could Support 2026 Output

Nordural’s Grundartangi smelter produced 275,000t of aluminium in 2025. Century said in February that it expected the Icelandic operation to produce 215,000t in 2026, down by 21.8% from the previous year because of the potline outage.

The early restart may improve this year’s production outlook. However, the final impact will depend on how quickly Century can re-energise the remaining pots and stabilise operations.

Primary aluminium smelters are highly sensitive to power and electrical infrastructure reliability. A transformer failure can remove large volumes from supply because restarting pots requires careful sequencing and operational control.

The restart also matters for European aluminium users. Icelandic aluminium is part of the broader Atlantic supply base, and any disruption can influence regional availability, premiums and procurement planning.

Century’s ability to bring the potline back ahead of schedule helps reduce uncertainty. Still, the planned transformer replacement later this year means electrical resilience will remain a key operational focus.

Century Expands US and Iceland Aluminium Supply

Century’s Iceland restart comes shortly after the company began production from its Mt Holly expansion project in South Carolina. The Mt Holly project is expected to lift that smelter to 229,000 t/yr by the end of June.

The two developments strengthen Century’s position across both North American and Atlantic primary aluminium supply. Nordural restores disrupted Icelandic output, while Mt Holly adds domestic US production capacity.

This is strategically relevant as aluminium supply chains become more policy-sensitive. The US has moved to support domestic primary aluminium production through trade measures, while European buyers remain exposed to power costs, smelter outages and regional premium volatility.

Century is therefore improving supply availability from two directions. The company is recovering lost production in Iceland and expanding output in the US.

For the market, the restart provides near-term supply relief. For Century, it reduces the earnings impact of the October outage and supports a stronger production base heading into the second half of 2026.

The Metalnomist Commentary

Century’s Nordural restart shows how quickly aluminium supply risk can turn on electrical infrastructure reliability. In a tight primary aluminium market, restoring idled pots ahead of schedule can matter almost as much as adding new capacity.