Key Takeaways:
Tin, indium and hafnium face a structural supply-demand squeeze as AI hardware expansion creates new consumption channels that existing mine output cannot easily fill.
Tin climbed to $34,200 per tonne on the LME, up 18% year-to-date, as the metal's role in AI server PCB manufacturing drives demand growth that global supply — stagnant at about 29 million tonnes annually for a decade — is struggling to match, according to a June 20 report from Soochow Securities.
"Global AI capital expenditure is entering a nonlinear acceleration phase, with capital deployment expanding from single-chip products to servers, high-speed networks, power infrastructure and cooling facilities, bringing demand dividends to upstream basic raw materials," Liu Yiting, an analyst at Soochow Securities, said.
The report projects PCB-related tin consumption will rise to 212,000 tonnes by 2030 from 163,000 tonnes in 2026, a net increase of 49,000 tonnes over four years. AI server PCBs use 28-46 layers versus 8-24 for traditional servers, with HDI board tin consumption at 40.19 grams per square meter — more than three times the 12.84 grams for multilayer boards. Global PCB shipments are forecast to reach 663 million square meters by 2030, per Prismark data.
Supply constraints run deeper than demand growth. Global tin reserves stand at about 600 million tonnes with a static reserve-to-production ratio of 20.7 years — below copper, nickel and cobalt. China's tin mine output has fallen to 71,000 tonnes from 110,000 tonnes over the past decade, a compound annual decline of 4.3%. Indonesia, which accounts for 21% of global output, faces policy instability from mining permit changes, illegal mining crackdowns and royalty adjustments. Myanmar's Wa State, once supplying 17% of global tin, saw output drop to 12,000 tonnes after resource depletion and a mining ban; even after a second-half 2025 restart, shipments to China reached only about 1,300 tonnes per month by April 2026, below the pre-ban level of 2,200 tonnes.
Indium's AI channel runs through optical communications. Phosphide indium (InP) substrates are the core material for laser chips in high-speed optical modules, as data center interconnects shift from 800G to 1.6T and 3.2T speeds. Soochow estimates AI data center InP demand will reach 600,000 4-inch wafer equivalents in 2025, consuming 19.3 tonnes of indium, and surge to 13 million wafers by 2030, requiring 419 tonnes — a 22-fold increase. Global refined indium consumption was 2,316 tonnes in 2025, per the report.
Indium supply faces a structural bottleneck: 81.2% of global reserves are associated with lead-zinc polymetallic deposits, meaning higher indium prices cannot trigger standalone indium mine development. Zinc smelter capacity utilization has fallen to five-year lows as treatment charges decline, constraining primary indium output. China imposed export controls on InP, trimethyl indium and triethyl indium in February 2025. Domestic refined indium inventories on the Zhonglianjin platform fell to 273.8 tonnes by Jan. 28, 2026, from 488.8 tonnes in early 2025. Chinese refined indium stood at 4.70 million yuan per tonne as of June 11, 2026, up 58% year-to-date.
Hafnium's semiconductor channel is the smallest but fastest-growing. Hafnium-based high-k dielectric materials replaced silicon dioxide at Intel's 45nm node, reducing NMOS gate leakage by 25 times and PMOS leakage by more than 1,000 times. As the industry moves from FinFET to GAA architectures at 3nm and 2nm nodes, high-k dielectric demand continues rising. Soochow projects global hafnium demand will reach 142 tonnes by 2030 from 100 tonnes in 2024, with the semiconductor segment growing to 64 tonnes from 40 tonnes.
Hafnium supply is a byproduct of nuclear-grade zirconium sponge production, with global capacity above 10,000 tonnes per year but actual output of 6,000-7,000 tonnes, yielding about 100 tonnes of hafnium. Zirconium-hafnium separation is technically difficult — hafnium accounts for only 1%-3% of the zirconium-hafnium mix — and involves toxic solvents and high-concentration acids. Two US producers could theoretically double hafnium output, but each would generate an additional 2,000 tonnes of de-hafniated zirconium annually with no guaranteed buyers. Russia's invasion of Ukraine in 2022 cut off Russian sponge hafnium supply, pushing international prices to $4,500-$5,000 per kilogram from $1,200-$1,400. China's 4N-grade hafnium oxide reached 9.50 million yuan per tonne by June 16, 2026, up 111% from 4.50 million yuan in early 2022.
The three metals share a common structural feature: demand growth from AI hardware is colliding with supply systems that cannot respond quickly through price signals alone. Tin faces reserve depletion and policy risk across Indonesia, Myanmar and South America. Indium is captive to zinc smelter economics and Chinese export controls. Hafnium depends on nuclear-grade zirconium demand and technically complex separation. The next catalyst for all three will be the Big Four cloud capex cycle — Microsoft, Google, Amazon and Meta are expected to spend a combined $725 billion in 2026, according to Soochow.
This article is for informational purposes only and does not constitute investment advice.
