Tin is a silvery-white post-transition metal with the atomic number 50 and the chemical symbol Sn (from the Latin stannum). It has been used by humans for over 5,000 years, initially as a component of bronze (an alloy of copper and tin) and later in a wide range of industrial applications. Tin is malleable, corrosion-resistant, and has a low melting point of 232 degrees Celsius, making it highly versatile in manufacturing [1].
Tin has not been mined or smelted in the United States since the early 1990s. The US is approximately 77% reliant on imports for refined tin, with primary sources including Indonesia, Malaysia, Peru, and Bolivia [1]. This import dependence, combined with tin's essential role in electronics manufacturing, has led to its inclusion on the 2025 US Critical Minerals List [2].
In the United States, tin consumption in 2025 was distributed across several categories: chemicals (25%), tinplate (16%), alloys (12%), solder (11%), babbitt, brass, bronze, and tinning (7%), bar tin (2%), and other uses (27%) [1].
Tin is an essential component of solder, the material used to create electrical connections on circuit boards and in semiconductor packaging. Following the global transition away from lead-based solders driven by environmental regulations such as the EU's Restriction of Hazardous Substances (RoHS) directive, tin-based solders now dominate the electronics industry. Every smartphone, computer, server, and semiconductor device contains tin solder joints. As semiconductor manufacturing expands under programs like the CHIPS and Science Act, domestic demand for tin is expected to increase [3].
Tin-coated steel (tinplate) is used extensively in food and beverage packaging. The thin tin layer provides corrosion resistance, maintaining food safety and shelf life. Tinplate remains the standard material for canned goods worldwide.
Tin compounds are used in a variety of chemical applications, including stabilizers for PVC plastics, catalysts in chemical manufacturing, and as biocidal agents in marine antifouling coatings. Organotin compounds are used in glass coatings to improve strength and conductivity.
Tin is a component of bearing metals (babbitt), bronze (copper-tin alloys), and pewter. These alloys are used in automotive, aerospace, and industrial equipment where low-friction, corrosion-resistant surfaces are required.
The United States has no active tin mines and has not smelted tin domestically since 1989. All primary tin consumed in the US is imported. In 2025, the estimated customs value of imported refined tin was $970 million [1].
Global tin mine production is concentrated in a small number of countries. China, Indonesia, Myanmar, and Peru collectively account for the majority of global output. Indonesia is the world's largest exporter of refined tin, while China is both the largest producer and consumer. The London Metal Exchange (LME) tin price averaged approximately $1,500 per pound in 2025 [1].
About 17,000 metric tons of tin was recycled from old and new scrap in the United States in 2025, but secondary production covers only a fraction of total consumption [1].
Tin was added to the US Critical Minerals List due to the country's near-total import dependence and tin's essential function in electronics and defense manufacturing. The 2025 Final List of Critical Minerals includes 60 mineral commodities; tin qualifies based on supply concentration risk and the potential economic impact of a supply disruption [2].
The expansion of domestic semiconductor fabrication under the CHIPS and Science Act has created additional strategic urgency. As of October 2024, the US Department of Commerce had announced preliminary agreements with 20 companies for 32 semiconductor manufacturing projects across 20 states, allocating nearly $34 billion in direct funding. These facilities will increase domestic demand for tin used in capacitors, solder, and semiconductor packaging [3].
The Volney Project in South Dakota's Black Hills, operated by Lion Rock Resources (TSXV: ROAR), confirmed tin (cassiterite) mineralization during Phase 1 drilling. For details, see Tin Exploration at the Volney Project.
For additional context on South Dakota's mining district, see: The Homestake Mining District: A Modern Exploration Guide.
Is tin the same as aluminum?
No. Tin (Sn) and aluminum (Al) are different elements with distinct properties. While both are used in packaging, tin has superior corrosion resistance and is the standard coating for steel food cans. Aluminum is lighter and is used in beverage cans and foil. The term "tin can" persists colloquially, but modern food cans are made of tin-coated steel.
Can tin be recycled?
Yes. Tin is highly recyclable. In the United States, tin is recovered from old scrap at detinning plants and secondary nonferrous metal processing facilities. In 2025, approximately 9,000 metric tons of tin was recovered from old scrap, with additional recovery from new manufacturing scrap [1].
Why does the US not mine tin?
The last US tin mine ceased operations in 1993, and the last domestic tin smelter closed in 1989. Historically, US tin production was small-scale, concentrated in pegmatite and placer deposits in Alaska and the Black Hills of South Dakota. Low grades, small deposit sizes, and competition from lower-cost producers in Southeast Asia and South America made domestic production uneconomic at prevailing prices. The Tinton district in South Dakota's Black Hills produced tin historically from pegmatite sources [4].
[1] U.S. Geological Survey, "Tin," Mineral Commodity Summaries 2026, February 2026. https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-tin.pdf?v=060206
[2] U.S. Department of the Interior, "Final 2025 List of Critical Minerals," Federal Register, November 7, 2025.
[3] U.S. Geological Survey, "Tantalum," Mineral Commodity Summaries, January 2025. (CHIPS Act context) https://pubs.usgs.gov/periodicals/mcs2025/mcs2025-tantalum.pdf?v=060206
[4] Smith, W.C. and Page, L.R. (1941), "Tin-Bearing Pegmatites of the Tinton District, Lawrence County, South Dakota." U.S. Geological Survey.
Disclaimer
This article is published by Lion Rock Resources Inc. (TSXV: ROAR, OTCQB: LRRIF, FSE: KGB) for educational purposes only. It does not constitute investment advice, a recommendation to purchase securities, or an offer of securities for sale. All data is sourced from publicly available government and institutional publications. There is no assurance that any government program, incentive, or policy will apply to or benefit the Company or the Volney Project.
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