China Moves to Curb Aluminium Output Amid Energy-Use Crackdown

China's aluminium sector, which supplies close to 60 percent of the world's primary metal, is facing growing pressure to cut output as authorities tighten scrutiny of energy use and carbon emissions. The concern centers on a nationwide inspection of key industries that researcher Mysteel Global says could force smelters to trim production. Aluminium is one of the most power-hungry industries in the country, and regulators have signalled they want operators running within both capacity and emissions limits.

The first concrete sign of curbs came in Baise, in the southern region of Guangxi, where a smelter reduced its output of molten aluminium. No volume figures have been released, but the move was read by traders as an early indicator of a wider clampdown. On May 13, 2026, the Ministry of Industry and Information Technology confirmed that steel and oil refining would also be targeted under the same review, broadening the scope well beyond aluminium.

The timing matters. Chinese smelters have been running above their rated capacity for months to take advantage of a global supply squeeze. Since the conflict in the Middle East escalated in late February, the effective closure of the Strait of Hormuz has cut off a large share of Gulf aluminium reaching international buyers. That left China as the swing supplier, and domestic producers responded by pushing output to record levels. Total primary aluminium production reached 15.33 million tonnes in the first four months of 2026, up 3.5 percent on the same period a year earlier.

By late May the picture had shifted again. Inventories had swollen, and the government moved to rein in the overproduction it had previously tolerated. Smelters in Yunnan province, a major hydropower-based hub, were directed to cut electricity consumption by between 15 and 30 percent. A new round of central environmental inspections, launched in early May, covers Guangxi, Xinjiang and several other provinces that together account for much of the country's smelting base.

The market reaction has been sharp. Benchmark aluminium on the London Metal Exchange settled at 3,672.50 dollars a tonne, the highest level since March 2022 and a four-year peak. Two forces are reinforcing each other. Buyers who cannot easily source metal from the Gulf are leaning harder on Chinese supply, just as that supply is being threatened by the emissions review. Analysts describe this overlap as a compounding risk that lifts prices more than either factor would on its own.

China caps national aluminium capacity at 45 million tonnes a year, a ceiling introduced to limit oversupply and curb emissions from one of its most carbon-intensive sectors. Producers have learned to run slightly above nameplate capacity through efficiency gains, but the current inspections threaten to close that gap. Industry estimates suggest operating capacity could fall meaningfully if the curbs are enforced across the main producing provinces.

For downstream users in automotive, construction, packaging and aerospace, the combination of tight Gulf supply and the risk of Chinese cuts points to higher costs and tighter availability through the second half of 2026. Much now depends on how aggressively inspectors enforce the energy and emissions targets, and whether the Hormuz disruption eases. As of late May 2026 the situation remains active and unresolved, with smelters, traders and consumers watching each new directive closely.