What Is Tin? Critical Mineral Uses, Supply & Price Guide

• What is tin: a silvery post-transition metal, symbol Sn
• Roughly half of global tin consumption goes into solder
• China, Indonesia and Peru lead 2025 mine production
• USGS lists tin among its 2025 critical minerals
• No cost-effective substitute exists for solder-grade tin
• US refined tin imports cover about 77% of demand

What is tin? It is the metal that solders together almost every printed circuit board on the planet, and there is no substitute waiting in the wings. Tin (chemical symbol Sn, atomic number 50) has been used since the Bronze Age, but its modern relevance sits squarely in semiconductors, electric vehicles and defence electronics, which is why the United States Geological Survey lists tin as a critical mineral.

What Is Tin? Properties and Characteristics

Tin is a soft, malleable, silvery-white post-transition metal that sits in group 14 of the periodic table alongside carbon, silicon and lead. It melts at 231.9°C, the lowest melting point of any metal in its group, and resists corrosion in air and water thanks to a thin oxide layer that forms on the surface. Tin has ten stable isotopes, more than any other element, a quirk tied to its atomic number being a nuclear “magic number.” Below 13.2°C tin can slowly transform into a brittle, non-metallic form known as grey tin or “tin pest,” which is why commercial-grade tin is alloyed with small amounts of bismuth or antimony to keep it stable.

Commercially, tin is extracted almost entirely from cassiterite (SnO₂), a heavy, chemically resistant ore that concentrates in alluvial river deposits. That is one reason tin mining looks different from most other critical minerals: a large share of world supply still comes from artisanal and small-scale dredging rather than industrial open-pit or underground operations, particularly in Indonesia and the Democratic Republic of the Congo.

What Is Tin Used For?

Solder accounts for close to half of global tin consumption, the largest single end-use by far. Tin-lead and lead-free tin solders join components on every circuit board that goes into a smartphone, server, EV battery management system or missile guidance package, and no alternative alloy matches tin’s combination of low melting point, conductivity and joint strength at commercial scale. That is the core reason tin sits on critical minerals lists in the US, UK, Canada and Japan despite its relatively modest production tonnage next to metals like copper or aluminium.

The remaining demand splits across tinplate (steel food and beverage cans coated with a thin tin layer to stop corrosion), niobium-tin superconducting magnet wire used in fusion and MRI systems, brass and bronze alloys, PVC stabilisers, and indium tin oxide coatings used in touchscreens and solar panels. In the United States specifically, chemicals rather than solder are the largest single domestic end-use, reflecting an industry weighted toward specialty tin compounds rather than electronics assembly, which happens overwhelmingly in Asia.

Where Is Tin Produced?

China, Indonesia and Myanmar are the three largest mine producers, but together they account for roughly half of world output, not the two-thirds figure sometimes cited for tin supply concentration. China mined an estimated 71,000 tonnes of contained tin in 2025 and Indonesia around 61,000 tonnes, according to USGS estimates, with Peru, Brazil, the Democratic Republic of the Congo and Bolivia rounding out the next tier of suppliers at roughly 15,000 to 33,000 tonnes each. Refining and smelting capacity is more concentrated than mining itself, with China and Indonesia handling a disproportionate share of the world’s midstream processing.

Indonesia’s position is significant enough that it now runs a dedicated annual tin track at its critical minerals conference, alongside its larger nickel and cobalt programme, reflecting how much of the region’s downstream tin processing decisions get made there.

Tin Price and Market

Tin trades primarily on the London Metal Exchange, alongside secondary contract markets in Kuala Lumpur and Indonesia. USGS estimates put the 2025 average LME cash price at 1,500 cents per pound, up 10% on 2024, with the US New York dealer price averaging 1,600 cents per pound, a 13% annual increase. For live spot rates, historical price movement and a currency-converted breakdown, see the tin price tracker. Together, these figures answer what is tin worth today in sourceable terms rather than a single headline number.

Demand growth from AI server hardware, EV electronics and solar manufacturing has kept the market structurally tight, while a thin pipeline of new mining projects means supply has struggled to expand much beyond the roughly 290,000-tonne annual mine output USGS estimates for 2025. Recycled tin, largely recovered from old and new scrap, meets a meaningful share of demand in markets like the US where it accounts for close to a quarter of apparent consumption.

Tin Supply Chain Risks

Mining suspensions in Myanmar’s Wa State, periodic export licensing delays in Indonesia (covered in more depth on the Indonesia country hub), and civil unrest affecting Peruvian operations have each knocked meaningful volumes of tin production offline in recent years, and the concentration of supply in a handful of countries means any single disruption can move the global market quickly. Declining ore grades at some of China’s older alluvial deposits add a second structural pressure on top of that geographic concentration, pushing more of the incremental supply response toward higher-cost projects.

Western governments have responded with friendshoring pushes: the Minor Metals Trade Association tracks these policy shifts closely on behalf of the tin and broader minor metals trade, and initiatives such as the UK’s critical minerals strategy prioritise both diversified sourcing and higher electronic-waste recycling rates to reclaim tin domestically. In the US, a company has begun building a Virginia tin smelting and recycling facility backed by Defense Production Act funding, explicitly aimed at reducing reliance on Asian refining capacity for a metal Washington now formally treats as a supply chain vulnerability.

This article is for informational purposes only and does not constitute investment advice.