Nestled in the mountains of eastern South Korea, the long-idled Sangdong tungsten mine is being brought back to life as a cornerstone of a new critical minerals strategy. By reviving one of the world’s largest known tungsten deposits, South Korea and its partners are positioning the site to become a pivotal non‑Chinese source of a metal that underpins modern weapons systems, semiconductors, and advanced manufacturing.
Almonty Industries is leading the restart, betting that Sangdong’s high-grade ore and strong backing from the United States can help redraw global supply chains that have been shaped for decades by China’s dominance of tungsten production.
From shuttered pit to strategic asset
Sangdong was once central to South Korea’s postwar industrial rise, but the mine closed in the 1990s after a flood of cheaper Chinese exports undercut its economics. Reporting on the region notes that Sangdong, a small town in Yeongwol County in South Korea’s Gangwon Province, built its identity around the tungsten operation before it was shuttered as China ramped up output and seized global market share. As one analysis put it, the mine had been a major source of South Korea’s income until China’s surge in production made continued operations uneconomic, a shift that helped entrench Beijing’s control of more than 80 percent of global supply.
The pendulum is now swinging back. Almonty Industries has acquired and redeveloped the site, with company materials describing the Sangdong tungsten mine in South Korea as a flagship project intended to restore the country’s role among leading tungsten producers on the planet. A detailed project update from SMM’s Tungsten Express, titled Almonty Updates Sangdong Tungsten Mine Plan, framed the restart as a direct response to China’s current greater than 80 percent supply dominance, underscoring how a once-dormant mine has been recast as a strategic asset in a more contested minerals landscape.
High-grade ore and a rapid ramp-up
Almonty’s bet on Sangdong rests on geology as much as geopolitics. Company and government descriptions highlight that the mine’s ore grades are roughly 3 to 3.5 times higher than the average reported for Chinese deposits, a differential that can translate into lower unit costs and more resilient margins through commodity cycles. Analysts following the project point to significant proven reserves at Sangdong, arguing that the combination of high-grade ore and scale gives the site a rare ability to support both commercial customers and government stockpiles over the long term.
The restart is no longer theoretical. Tungsten producer Almonty Industries Inc has announced that the first truckload of ore from Sangdong has been successfully delivered to the processing plant, marking the transition from development to commercial mining. A separate project update titled Sangdong Mine Nears Operational Milestone described how ore was first transported through the haulage system in mid‑December, signaling that the complex underground infrastructure is now functioning at scale.
Almonty has since characterized its broader business as entering a critical production ramp-up phase, in a release titled Almonty Industries Enters Critical Production Ramp-Up Phase, which referenced the date code 02.01 and emphasized that the company expects operating costs at Sangdong to be competitive with, or lower than, those of comparable global projects. Together, these milestones suggest that Sangdong is moving quickly from a dormant asset to a fully fledged producer capable of influencing global tungsten flows.
Why tungsten matters for U.S. power
Tungsten’s strategic value lies in its unique physical properties. With the highest melting point of any metal and exceptional density, it is indispensable in armor‑piercing munitions, penetrators, and kinetic energy weapons, as well as in aerospace components, cutting tools, and semiconductor manufacturing equipment. U.S. defense planners have long warned that dependence on a single dominant supplier for such a material represents a critical vulnerability, particularly when that supplier is a strategic competitor. Since 2018, tungsten has been formally designated and managed as a critical mineral by the United States, a status highlighted in Almonty’s own description of its South Korean projects, which notes that Since that year Washington has treated the metal as essential to economic and national security.
China’s overwhelming share of mining and processing has sharpened those concerns. A detailed analysis of Sangdong’s reopening explains that the mine’s closure in 1994 coincided with China ramping up tungsten production and capturing global market share, a shift that left South Korea and its allies reliant on Chinese exports for a material embedded in everything from machine tools to guidance systems. Another report on U.S. and South Korean efforts to reduce China’s grip on critical minerals notes that Once Sangdong was a major source of South Korea’s income, but that position eroded as China consolidated control of the tungsten market. By bringing Sangdong back online at scale, policymakers in Seoul and Washington are seeking to chip away at that dominance and create a more diversified base of supply.
Washington’s quiet courtship of Sangdong
The United States has not been a passive observer of Sangdong’s revival. Over the summer, U.S. government researchers traveled to the South Korean site to assess progress and evaluate how quickly it could contribute to a broader critical minerals strategy. Coverage of the visit described the group as part of a push to boost supply of a critical metal in the race with China, and emphasized that the mine is seen as a potential anchor for a non‑Chinese tungsten chain serving U.S. and allied industries. A separate analysis of the region’s mining revival framed Sangdong as central to South Korea’s quest for tungsten autonomy, noting that the town in Yeongwol County in South Korea’s Gangwon Province is now at the heart of a much larger geopolitical contest.
U.S. interest is not limited to raw ore. Almonty has outlined plans to become a leading U.S. integrated tungsten producer, describing a recent transaction in a release titled Almonty Advances Intent to Become The Leading U.S. Integrated producer as a transformative moment that extends the company’s footprint into the United States. In that statement, Written by Lewis Black, the company stressed that entering the United States would help secure supply for the United States and its allies, linking Sangdong’s output to downstream processing and finished products in North America. This integrated approach is designed to reduce exposure not only to Chinese mines but also to Chinese processing capacity, which remains a chokepoint for many critical minerals.
Defense supply chains and the race to diversify
The defense sector illustrates how quickly Sangdong’s restart could ripple through U.S. supply chains. A recent analysis titled Almonty Industries Gains Strategic Favor in the Defense Supply Chain described how Almonty Industries is emerging as a significant player in supplying tungsten for advanced weapons, including armor‑piercing ammunition and AI‑guided missile systems. By tying Sangdong’s high‑grade ore to U.S. processing and manufacturing, the company is positioning itself as a preferred partner for programs that cannot tolerate disruptions linked to geopolitical tensions with China.
Public messaging around the project has increasingly stressed its national security implications. A video segment on how the United States could soon turn to South Korea for a vital mineral framed tungsten as central for U.S. national security and noted that this is not the first time tungsten has been at the center of war, citing its role in machine durability and munitions. Social media outreach from Almonty has echoed that theme, with a clip titled U.S. turns to Almonty Industries and South Korea for a vital Tungsten. highlighting Critical minerals, National security, and Global supply chains as the core stakes. A separate broadcast report, accompanied by an aerial view of the Sangdong site, described how the mine in eastern South Korea, owned and operated by Almonty Industries, could soon supply the United States with critical tungsten and help offset China’s dominance.
Visual coverage has reinforced the sense of scale. One widely shared clip opened with the line Deep in the mountains of South Korea in a remote part of the country’s east is one of the world’s largest deposits of tungsten, Yes, underscoring both the remoteness and the strategic weight of the deposit. Another segment simply noted that Dec footage showed the Sangdong complex sprawling across a valley, with new processing facilities under construction. Together, these images and reports convey how a once‑quiet mining town is being pulled into the center of a global race to secure the metals that underpin modern power.