AI's Copper Addiction: 50%+ Smelting in China Threatens Data Center Builds

Behind every neural network training run is a massive physical infrastructure of copper: power distribution, server interconnects, and liquid cooling systems. China's stranglehold on smelting (>50% global capacity) puts the hyperscale data center boom at risk. With the US Commerce Secretary set to recommend tariffs that could hike copper input costs by up to 30%, AI infrastructure projects may face budget overruns or timeline slips, just as demand from cloud providers accelerates.

The quiet yet escalating contest over copper between the United States and China has reached a pivotal juncture, with US Commerce Secretary Howard Lutnick poised to deliver a critical market assessment to the White House by June 30, 2026. This report will update the administration on the necessity of new tariffs on refined copper imports, building on Lutnick's previous recommendation to impose duties of 15% starting January 1, 2027, and escalating to 30% a year later. These proposed tariffs would layer on top of an existing 50% tariff on semi-finished copper products and intensive derivative items enacted in August 2025, part of a broader executive order signed by President Trump earlier that year to revive America's domestic copper industry. The central tension is stark: the US's aggressive push for supply chain security collides with an industry overwhelmingly concentrated in China, which the White House has repeatedly identified—without naming—as the foreign producer controlling over 50% of global smelting capacity and operating four of the world's five largest refining facilities.

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This report will update the administration on the necessity of new tariffs on refined copper imports, building on Lutnick's previous recommendation to impose duties of 15% starting January 1, 2027, and escalating to 30% a year later.

The strategic importance of copper has fundamentally transformed the metal from a cyclical commodity into a 21st-century geopolitical linchpin. Demand is being driven by three interlocking megatrends: artificial intelligence, the energy transition, and advanced weapons systems. AI alone is a ravenous copper consumer: data centers require massive amounts of the metal for power distribution, cooling systems, and servers. Each electric vehicle needs roughly four times the copper of a conventional car, and modern weapons from guided missiles to electronic warfare platforms are packed with copper-intensive electronics. This structural demand shift, combined with years of underinvestment in mining capacity, has created a market where supply disruption could cascade through the global economy. For the US, the national security implications are acute: over-reliance on a single foreign producer—one with which it has an increasingly adversarial relationship—for a material essential to defense readiness is untenable.

The tariff strategy is a double-edged sword. By imposing duties, Washington aims to incentivize domestic production and reduce dependence on Chinese-controlled refining. However, the US has limited domestic smelting capacity and faces significant barriers to scaling up, including environmental permitting hurdles and a shortage of skilled labor. Tariffs could raise costs for downstream manufacturers—automakers, electronics producers, defense contractors—and potentially slow the energy transition. The prior 50% tariff on semi-finished products offers a preview: while it may have sparked some investment announcements, it has not yet materially reshaped the supply chain. The proposed escalating tariff of 15% to 30% is intended to provide a predictable timeline for industry to adjust, but critics argue it could simply shift imports to other Asian refining hubs, such as South Korea or Japan, or incentivize China to relocate smelting capacity to third countries.