Chalco Aluminium Output Rose in 2025 as Primary Metal Prices Supported Revenue

Chalco Aluminium

Chalco aluminium output increased in 2025 as the Chinese state-owned producer raised both primary aluminium and alumina production. The company’s primary aluminium output, including aluminium alloy, rose by 6.2% on the year to 8.08mn t.

Primary aluminium sales also increased by 6.2% to 8.07mn t, showing that Chalco was able to convert higher output into stronger market deliveries. The result reflected China’s stable aluminium demand base and firmer metal prices during the year.

Chalco aluminium output growth came as China’s primary aluminium capacity approached Beijing’s 45mn t ceiling. The company said national capacity reached 44.83mn t by the end of 2025, leaving limited room for further domestic expansion.

Alumina Growth Faced Price Pressure From New Capacity

Chalco produced 17.35mn t of metallurgical alumina in 2025, up 2.9% from the previous year. Metallurgical alumina remains the key feedstock for primary aluminium production, making its pricing central to smelter economics.

The company’s fine alumina output also rose by 4.6% to 4.51mn t. However, metallurgical alumina sales increased by only 1.1% to 6.42mn t, reflecting weaker market conditions in the alumina segment.

China’s alumina capacity expanded sharply by 10.3mn t in 2025, while output rose by 8.3%. But aluminium demand growth was constrained by the national capacity cap, creating a mismatch between alumina supply growth and smelter demand.

As a result, alumina prices fell sharply and Chalco’s alumina revenue dropped by 16.8% from a year earlier. This shows how quickly upstream feedstock profitability can weaken when capacity expands faster than downstream demand.

Aluminium Prices Remained Stronger Despite Capacity Limits

Chalco aluminium output benefited from firmer aluminium prices in 2025. The company said aluminium prices increased alongside gold and copper, supporting a 6.8% year-on-year rise in aluminium revenue.

This contrast between alumina and aluminium is important. Alumina faced surplus pressure, while primary aluminium remained better supported by capacity discipline, geopolitical risks and demand from transportation and power electronics.

Chalco expects China’s domestic alumina market to remain in surplus as new domestic and overseas capacity continues to come online. At the same time, it expects aluminium prices to stay relatively high but more volatile.

The outlook reflects a structural divide in China’s aluminium chain. Alumina producers face oversupply risk, while smelters benefit from a tighter national capacity ceiling and stronger downstream demand.

The Metalnomist Commentary

Chalco’s 2025 results show that China’s aluminium value chain is no longer moving in one direction. Alumina is entering a surplus cycle, while primary aluminium remains supported by capacity limits and industrial demand. That split will shape margins across Chinese aluminium producers in 2026.