Tungsten — The Hardest Metal

Tungsten in the DRC

Tungsten, extracted from wolframite and scheelite minerals, is produced in relatively small quantities in eastern DRC. As one of the 3TG conflict minerals, DRC tungsten is subject to the same due diligence and traceability requirements as tantalum and tin. China dominates global tungsten production at approximately 82%, and has imposed export controls that elevate the strategic importance of alternative sources including the DRC.

While tungsten is not a primary focus of the Lobito Corridor, its inclusion in the DRC's mineral portfolio and its designation under the December 2025 US-DRC Strategic Partnership agreement underscores the breadth of critical minerals flowing from corridor-connected regions.

Industrial Applications and Strategic Value

Tungsten's exceptional hardness, highest melting point of any metal (3,422°C), and density make it irreplaceable in cutting tools, drill bits, military armour-piercing ammunition, and high-temperature aerospace components. Cemented tungsten carbide — tungsten combined with cobalt binder — is the material that makes modern manufacturing possible: without tungsten carbide tools, precision machining of metals, drilling for oil and gas, and mining itself would be dramatically less efficient.

Military applications give tungsten strategic significance beyond its industrial role. Tungsten kinetic energy penetrators are used in tank ammunition and anti-armour weapons. Tungsten alloys are used in missile components and radiation shielding. These defence applications ensure tungsten is classified as a critical mineral by all major Western economies.

Chinese Dominance and Supply Risk

China produces approximately 80% of global tungsten and has periodically imposed export restrictions. This dominance creates supply chain vulnerabilities that are even more extreme than for cobalt or rare earths. Unlike lithium or cobalt, where alternative sources are being developed, non-Chinese tungsten production is limited and costly to expand.

DRC tungsten production, primarily from artisanal mining in eastern provinces, provides a small but strategically significant non-Chinese supply source. Like tin and tantalum, DRC tungsten is subject to conflict mineral regulations. The 3TG framework — tin, tantalum, tungsten, and gold — was designed partly in response to the DRC's conflict mineral dynamics.

Corridor Relevance

Tungsten is not a primary corridor commodity in volume terms, but the conflict mineral framework it shares with tin and tantalum shapes the regulatory environment for all DRC mineral exports. The corridor's potential to provide traceable, formalised export routes for DRC minerals benefits from the infrastructure investments originally motivated by copper and cobalt but applicable to smaller-volume strategic minerals including tungsten.

The growing recognition of critical mineral supply chain vulnerabilities — accelerated by Russia's invasion of Ukraine and Chinese export restrictions on germanium and gallium — has elevated the strategic importance of every non-Chinese mineral source, including DRC tungsten. This security dimension adds a layer of strategic value to corridor infrastructure that purely commercial analysis would miss.

Tungsten Supply Chain Vulnerabilities

The concentration of tungsten production in China — approximately 80% of global supply — represents the single most extreme supply chain vulnerability among the 3TG conflict minerals. Unlike cobalt (where DRC dominance is partially offset by other producers) or rare earths (where Australia and others provide meaningful supply), non-Chinese tungsten production is genuinely scarce and difficult to expand.

Major non-Chinese tungsten sources include Portugal (Europe's only significant producer), Spain, Rwanda, Vietnam, and Bolivia. Each faces constraints: European deposits are small and expensive; Vietnamese and Bolivian operations face governance challenges; Rwandan tungsten, like DRC tungsten, carries conflict mineral regulatory requirements.

This supply scarcity means that even small volumes of certified-conflict-free DRC tungsten carry disproportionate strategic value. Defence procurement officials in the US and EU actively seek non-Chinese tungsten sources for military applications where supply chain security is paramount. The corridor's ability to provide traceable DRC tungsten exports, verified through our evidence archive, addresses a genuine strategic need.

Tungsten Pricing and Economics

Tungsten concentrate (wolframite or scheelite) trades at approximately $300-350 per metric tonne unit (MTU) of WO3 content. Processed tungsten products — ammonium paratungstate (APT), tungsten powder, and cemented carbide — command progressively higher prices. The value multiplication from raw ore to finished tungsten carbide tools can exceed 100x, making tungsten processing an extraordinarily high-value-addition activity.

Chinese dominance in tungsten processing mirrors the pattern seen across critical minerals: African ore, Chinese processing, Western end-use. Breaking this pattern for tungsten requires not just diversified mining but diversified processing capacity — a challenge that applies across the critical minerals spectrum and that the corridor's value-addition vision seeks to address.

Tungsten in Manufacturing and Construction

Cemented tungsten carbide is essential to modern manufacturing. Cutting tools, drill bits, mining equipment, and construction machinery all rely on tungsten carbide's extreme hardness and wear resistance. Without tungsten carbide tools, the cost and time required for mining operations — including the copper and cobalt mining that drives the corridor — would increase dramatically.

This creates an interesting circular dependency: corridor mining operations consume tungsten carbide tools to extract copper and cobalt, while the corridor potentially facilitates DRC tungsten exports that feed tungsten carbide tool manufacturing. The interdependence of critical minerals in modern industrial supply chains means that disruption to any single mineral — including tungsten — cascades through multiple downstream industries.

Tungsten Recycling and Secondary Supply

Tungsten carbide scrap is a significant secondary source, providing approximately 25-30% of tungsten input to cemented carbide production. Recycling economics are favourable because tungsten carbide is used in large pieces (drill bits, machine tools) that can be collected and processed more easily than dispersed materials like tantalum in electronics.

However, recycling cannot meet demand growth. New primary tungsten supply is needed, and the limited options outside China give strategic value to every non-Chinese source, including DRC artisanal production. The corridor's governance infrastructure — traceability, community protection, environmental monitoring — could support the formalisation and verification of DRC tungsten supply chains, adding another commodity to the corridor's strategic portfolio.

Tungsten and Corridor Mining Operations

Every mining operation along the Lobito Corridor consumes tungsten carbide in its drilling, blasting, and processing equipment. Drill bits that bore into copper-bearing rock, excavator teeth that load ore, and crusher linings that reduce rock to processable sizes all contain tungsten carbide. The corridor's mining operations are thus both potential sources of tungsten (through artisanal mining in eastern DRC) and consumers of tungsten products (through industrial equipment).

This dual relationship illustrates the interconnectedness of critical mineral supply chains. Disruption to Chinese tungsten supply would increase costs for corridor mining operations through more expensive equipment and tooling. Conversely, development of non-Chinese tungsten supply — potentially facilitated by corridor traceability infrastructure — would benefit the mining operations that depend on tungsten carbide tools. This systemic interconnection reinforces the strategic case for comprehensive critical mineral supply chain security that the corridor and our monitoring platform support.

Our intelligence products track tungsten as part of the broader critical minerals landscape, providing context for investors and policymakers who need to understand the full web of mineral interdependencies that underpin the energy transition and the corridor's commercial viability. Individual mineral analysis, while essential, must be supplemented by supply chain systems thinking that recognises these interdependencies.

Related Pages

Related minerals: Tantalum · Tin · Gold (co-designated 3TG)

Countries: DR Congo · Zambia · Angola