A £1.4bn Tungsten Deal That Shifts Trajectory, Not Destination

China mines 79% of the world’s tungsten. The United States mines none. That single fact is the strategic context behind every headline in the Hemerdon-Elmet announcement.

On 23 September 2026, Tungsten West and Elmet Technologies announced a binding eight-year, £1.4-billion offtake agreement linking the Hemerdon mine in Devon to a vertically integrated US tungsten manufacturer backed by $450 million in US Department of War capital and up to $2 billion in defence stockpile contracts. The UK National Wealth Fund had already committed up to £71 million to the mine’s restart, with an exclusive right to negotiate up to 50% of Hemerdon’s annual output. These are interlocking instruments of a coordinated UK-US effort to construct a non-Chinese tungsten value chain from mine to finished product.

This analysis examines whether the architecture of the deal is genuinely sufficient to shift the supply balance, where the gaps remain, and what investors tracking critical minerals policy should watch as Hemerdon moves toward its Q1 2027 production target.

What the Hemerdon-Elmet contract actually commits each party to

The headline number is £1.4 billion, and headline numbers in mining announcements deserve scrutiny before they earn belief. This one holds up better than most, because it rests on a genuinely binding volume obligation rather than an aspirational memorandum.

Under the agreement, Elmet expects to take more than 1,000 metric tonnes per year of tungsten concentrate, measured as WO₃ equivalent, from Hemerdon. Both parties have stated they aim to grow that volume over the life of the contract, which runs through 31 December 2034.

There is a second, more strategically loaded provision. At Tungsten West’s request, Elmet has agreed to make commercially reasonable efforts to process an additional 500 tonnes per annum of contained WO₃. That tranche exists specifically to accommodate UK Government strategic requirements and UK industry, and it is the clearest sign that this contract was written with sovereign demand in mind, not just commercial throughput.

The material itself does not move as raw concentrate to a customer and stop there. Hemerdon concentrate converts into ammonium paratungstate (APT), a refined intermediate that is the standard tradeable form of processed tungsten, before flowing on to further downstream products through Elmet’s allied refining network. From there it feeds Elmet’s US manufacturing operations and its pending German plant.

Here is what the commercial structure amounts to:

• Duration: eight years, through 31 December 2034
• Indicative nominal value: over £1.4 billion at prevailing prices and exchange rates
• Equivalent annual offtake value: more than $230 million at current APT tungsten prices
• Volume: more than 1,000 tonnes per year WO₃ equivalent, plus an optional 500-tonne strategic tranche
• Material pathway: concentrate to APT to downstream intermediates, feeding US and German manufacturing

“This is a major milestone in establishing Hemerdon as a strategically important tungsten source for Western nations,” said Jeffery Court, Chief Executive Officer of Tungsten West.

The £1.4-billion figure is nominal, calculated at today’s prices across eight years, not a fixed guaranteed sum. The durable strategic value sits in the committed volume and the APT conversion pathway. That is what you should weigh, not the headline.

The government capital architecture underwriting both sides of the deal

The most significant analytical finding in this story is not the offtake itself. It is how much of the commercial risk on both sides of that offtake has been absorbed by governments before a single tonne is sold.

This is not a market-driven bilateral trade between a miner and a manufacturer. It is a layered structure of state commitments spanning two governments, and the parallel construction is deliberate.

The UK National Wealth Fund position

On 25 August 2026, the UK National Wealth Fund (NWF) announced an investment of up to £71 million to fund the Hemerdon restart. The package splits into equity and debt.

On the equity side, the NWF is subscribing to 100 million new shares at £0.36 per share, a £36 million commitment that leaves it holding roughly 7.42% of Tungsten West’s enlarged share capital. On the debt side, it has committed £25 million in financing, with a further non-committed £10 million accordion facility available on top.

Crucially, the investment unlocks an exclusive negotiation period granting the UK Government the right to procure up to 50% of Hemerdon’s annual production. Read that carefully, because it is a negotiation right, not a concluded offtake. A separate agreement is still required to convert it into guaranteed purchases, and that distinction matters when you assess how much demand is actually locked in.

The US Department of War and National Defense Stockpile backing

The American side is larger in dollar terms and structured to create demand certainty rather than supply. Elmet has secured a committed investment of $450 million from the US Department of War to build out its vertically integrated tungsten supply chain.

Separately, Elmet holds a contract valued at up to $2 billion to supply tungsten to the US National Defense Stockpile. Together, these instruments fund Elmet’s vertical integration and, just as importantly, give it the purchasing power to sign a long-term mine offtake with confidence that end demand exists.

The two positions interlock. The NWF’s equity and negotiation rights create a financing floor for the mine, while the US capital creates a floor for Elmet’s purchasing power. Neither government position alone would make the offtake commercially viable; together they do.

“The agreement reflects the UK’s critical minerals strategy and advances international partnerships aimed at strengthening economic security,” said Blair McDougall, UK Reindustrialisation Minister.

The UK critical minerals strategy frames Hemerdon as one of several priority projects in a broader 2035 resource security programme, giving the NWF’s equity commitment and procurement rights a policy context that extends well beyond the Tungsten West balance sheet.

What this tells you as an investor is that Hemerdon’s restart is not a straightforward mining equity bet. It is a sovereign-backed industrial programme with committed demand on one side and government equity plus debt on the other, which materially changes how you should read its financial durability.

Why tungsten is structurally difficult to source outside China

To judge whether this deal solves the problem, you first need to understand why the problem is so hard. It starts with physics.

Tungsten has the highest melting point of any metal, extreme density, and exceptional hardness. Those properties make it genuinely difficult to substitute in the applications that matter most to defence and advanced industry.

Where tungsten does the work that few other materials can:

• Armour-piercing munitions and kinetic energy penetrators
• Cutting tools and wear-resistant industrial parts
• High-temperature turbine and furnace components
• Radiation shielding and specialist nuclear and fusion materials

In each case, the alternatives carry trade-offs. Depleted uranium, tantalum and advanced composites can substitute in some defence roles, but at the cost of regulatory, environmental, performance or price penalties. In cutting tools, high-speed steels and ceramics tend to underperform tungsten carbide or cost more for the same result.

So the material is close to irreplaceable. The supply concentration is where the vulnerability becomes acute.

The tungsten supply crisis has been building for years as China’s trade restrictions and export controls progressively tightened the material available to Western manufacturers, creating the structural vulnerability that agreements like Hemerdon-Elmet are designed to address.

According to US Geological Survey Mineral Commodity Summaries published in February 2026, China mined 67,000 of the world’s 85,000 tonnes of tungsten in 2025, roughly 79% of global output. The United States recorded zero domestic mine production.

The USGS Mineral Commodity Summaries 2026 confirms that tungsten has not been mined commercially in the United States since 2015, and that China ranked first in the world in tungsten resources and reserves, providing the baseline production data against which Western supply chain efforts like Hemerdon-Elmet must be measured.

A single country mining nearly four-fifths of global supply would be concerning on its own. The picture worsens downstream, because China’s dominance extends well beyond mining into refining and APT production. Specific percentage figures for China’s share of global refining capacity are not confirmed in current sources, but it is widely described as controlling the majority of downstream processing.

That is the constraint to hold in mind. Controlling mine supply alone does not resolve the processing gap, and a country holding this much of both mining and refining wields structural leverage that no single mine restart can offset.

What the deal leaves unresolved, and where the gaps in the Western supply chain remain

The analysts who regard Hemerdon-Elmet as a major step also regard it as necessary but not sufficient. Both judgements are correct, and the space between them is where the risk lives.

The gaps fall into three categories:

1. Project execution risk at Hemerdon itself
2. Limited Western midstream processing capacity
3. The precedent set by other critical minerals

Project-level execution risks at Hemerdon

Hemerdon carries operational baggage. Under earlier operators it ran into operational and financial difficulties, including through 2018, which analysts cite as evidence that tungsten and tin projects with complex ore bodies and processing flowsheets can struggle at commercial scale.

The restart targets full-scale production by the end of Q1 2027, and that timeline depends on successful commissioning and ramp-up. Project economics remain exposed to tungsten price cycles, power and reagent costs, and the performance of upgraded processing circuits.

And the UK Government’s 50% procurement right, as noted earlier, is a negotiation entitlement rather than a concluded purchase contract. Until that separate agreement is signed, a meaningful slice of assumed demand remains conditional.

The Western processing-capacity gap

The deeper structural problem is midstream. Western APT refining and powder metallurgical capacity is limited, and much of the world’s APT is still produced in China.

Anchoring mine supply in friendly jurisdictions does not automatically fix that bottleneck. Building new or expanded APT plants and powder facilities carries high capital costs, strict environmental permitting and specialist expertise requirements, all of which stretch timelines.

The precedents are sobering. When China restricted rare-earth exports, Japan’s JOGMEC backed Lynas’s Mount Weld mine and Malaysian separation plant, establishing significant non-Chinese supply, yet China still dominates rare-earth processing today. Similar patterns played out in lithium and cobalt, where secured feedstock offtakes did not translate into supply-chain independence because processing stayed concentrated elsewhere.

The structural difficulty of building rare-earth processing outside China offers the clearest available precedent for tungsten, because the capital requirements, permitting timelines, and technical expertise barriers that slowed rare-earth diversification are directly analogous to the APT refining challenge the Western tungsten chain now faces.

The analyst consensus is precise on this point: bilateral offtakes are core building blocks that must be complemented by parallel investment in refining, recycling, stockpiles and demand-side adjustment.

The takeaway for investors and policymakers is that Hemerdon-Elmet changes the trajectory of Western tungsten supply without yet changing its destination. Elmet’s allied refining network is a genuine positive, but it depends on sustained government and customer commitment across multiple jurisdictions to hold.

Whether Hemerdon-Elmet marks a turning point or a starting point for Western tungsten

Assembled in full, the architecture is genuinely historic in scale for the tungsten sector. Hemerdon concentrate, Elmet’s APT conversion and US-German manufacturing, NWF equity and debt, US Department of War capital, and the pending UK Government offtake form a coordinated strategy rather than a single transaction.

Combined capital mobilised across the programme: £71 million in NWF financing, £1.4 billion in nominal offtake value, $450 million in US Department of War investment, and up to $2 billion in US stockpile contracts.

Whether that capital delivers structural durability or merely government-dependent fragility depends on three variables:

• Hemerdon’s operational performance through its Q1 2027 ramp-up
• Whether the UK Government concludes its own offtake, and at what scale
• Whether Western APT refining capacity expands beyond Elmet’s current allied network

Multiple ex-China tungsten projects are anticipated to add capacity by 2030, but a persistent supply gap is projected without accelerated, coordinated action across mining, refining, stockpiling and recycling.

The verdict is not settled by the announcement. If you track critical minerals investment, watch the UK offtake conclusion and Western refining build-out closely, because those two outcomes will decide whether this deal is the seed of a value chain or the ceiling of one.

For investors tracking how far coordinated action can realistically move the needle, our full explainer on tungsten supply chain diversification maps the strategic scenarios available to Western governments, including the stockpile, recycling, and allied-nation coordination pathways that sit beyond bilateral offtakes.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results. Financial projections and forward-looking statements are speculative and subject to change based on market conditions, company performance and various risk factors.