Pennsylvania metal powder producer 6K Additive secured a final $27.4 million loan from the Export-Import Bank of the United States on October 2, expanding a $50.8 million combined federal investment aimed at building the country’s first domestic source of certified refractory metal powders for defense. The deal landed eight days before a statutory clock most defense contractors have circled on their calendars: on January 1, 2027, federal law will bar tungsten sourced from China from a wide range of US defense applications, forcing procurement managers to replace supply chains they have relied on for decades.

6K Additive’s Burgettstown, Pennsylvania facility already ships nickel alloys, titanium, and refractory metal powders to aerospace and defense customers. The EXIM loan, approved under the agency’s Make More in America Initiative (MMIA) in coordination with the Department of War’s Defense Production Act Title III program, is the first EXIM deal of its kind coordinated with DPA Title III — and the largest MMIA loan ever authorized for advanced materials manufacturing. With the money now available for drawdown, 6K Additive plans to construct four new buildings at Burgettstown and acquire additional manufacturing equipment, pushing annual powder output from roughly 200 metric tonnes (220 short tons) today toward 1,000 metric tonnes (1,102 short tons) or more — a fivefold increase the company expects to reach by the end of this year.

Why Pentagon Buyers Have 90 Days to Find an Alternative

The urgency behind the expansion is written into US law. A provision tied to the NDAA and the REEShore Act of 2022 prohibits tungsten sourced from China and other designated countries from appearing in military equipment effective January 1, 2027. China dominates the global tungsten market — controlling approximately 80% of mined supply and refining chain for ammonium paratungstate (APT), powder, and carbide products.

Tungsten is not a material with substitutes. Its melting point of 3,422°C (6,192°F) — the highest of any metal — makes it irreplaceable in rocket nozzles, kinetic energy penetrators, and other defense components that must retain strength in extreme heat. Tungsten is used in armor-piercing projectiles and rocket nozzle components precisely because no other commercially available metal tolerates the thermal and mechanical demands of those applications. There is no off-the-shelf replacement that can be sourced domestically today. 6K Additive’s expansion, if it reaches initial production by year-end as planned, would arrive — just barely — before the ban takes effect.

How UniMelt Turns Scrap Into Aerospace-Grade Powder

The technology at the center of this expansion is 6K Additive’s proprietary UniMelt® microwave plasma system, which the company describes as the only production-scale microwave plasma process for metal powder spheroidization. The name stands for “Uniform Melt State Process,” a designation that traces to research at MIT’s Plasma Science and Fusion Center, and the physics behind it are directly relevant to why it matters for defense applications.

In conventional gas atomization — still the most widely used commercial powder production method — molten metal is blasted by high-pressure inert gas, fracturing into droplets that cool and solidify in flight. The process is fast and relatively low-cost, but it produces a range of particle shapes, creates satellites (fine particles that weld to larger ones during flight), and yields only 20–40% of powder in the fine, consistently spherical size range that precision additive manufacturing requires. For refractory metals like tungsten, which melt above 3,000°C (5,432°F), conventional gas atomization faces an additional constraint: it cannot efficiently reach the temperatures needed without contaminating the melt.

UniMelt operates differently. Microwave energy at roughly 6,000°C (10,832°F) — well above the melting points of tungsten, molybdenum, and the niobium-hafnium-titanium alloy C-103 — creates a uniform plasma zone. Irregular feedstock particles (angular powder, machined turnings, millings, even failed builds from additive manufacturing machines) are fed through this zone and emerge as nearly perfect spheres. Because every particle traverses the same thermal environment, rather than being injected from the side into a plasma plume as in older inductively coupled plasma systems, spheroidization approaches 100% yield per unit. The system also consumes approximately one-third the argon gas of conventional gas atomization, reducing operating costs and environmental footprint.

For defense procurement, two properties matter above all: traceability and morphology. DFARS (Defense Federal Acquisition Regulation Supplement) compliance requires that suppliers document full chain of custody for materials in critical defense components. Because UniMelt processes verified domestic feedstocks — scrap from US machining operations, used powder returned by manufacturers — 6K Additive can provide the documented domestic origin that defense contracts increasingly demand. And the consistent spherical morphology enables repeatable layer spreading in laser powder bed fusion printers, which is essential for qualifying parts to aerospace and defense standards.

Not Just Tungsten: Why C-103 Is the Hidden Supply Chain Risk

The procurement ban on Chinese tungsten is the headline constraint, but the deeper vulnerability in 6K Additive’s materials portfolio is C-103, the niobium alloy used in high-temperature aerospace and propulsion applications. C-103’s composition — 89% niobium, 10% hafnium, 1% titanium — earned it a place in the Apollo Lunar Module’s rocket descent engine nozzle and remains the material of choice for liquid rocket thruster nozzles where oxidation resistance and high-temperature performance are critical. A detailed accounting of C-103 applications in defense programs makes clear why its supply chain deserves as much attention as tungsten’s.

The US has no domestic niobium mining. According to USGS Mineral Commodity Summaries 2026, US net import reliance for niobium stands at 100%, with Brazil supplying approximately 67% and Canada the remainder. This differs from tungsten (where the concern is Chinese control) but the strategic implication is similar: every hypersonic program or advanced propulsion effort that uses C-103 components depends entirely on imported raw material. 6K Additive’s ability to produce certified C-103 powder from domestic feedstocks — including recycling of existing C-103 scrap from US aerospace operations — creates a partial closed-loop that does not require importing new niobium for recycled material.

This circular model is not just environmentally appealing. Aviation maintenance depots shed upwards of 60,000 pounds of mixed metal scrap weekly. Converting that scrap back into certified powder rather than disposing of it reduces the volume of new raw material imports needed while meeting the traceability requirements of defense contracts. A $1.95 million Phase II contract the Defense Logistics Agency awarded 6K Additive in April 2026 specifically targets this scrap-to-powder conversion model for nickel, titanium, tungsten, and niobium.

What Makes This Federal Loan Structure Novel

The $27.4 million EXIM loan is designed to work alongside the $23.4 million Defense Production Act Title III grant that the Department of War awarded 6K Additive in 2023, giving the company a total combined federal commitment of $50.8 million for the Burgettstown expansion. The loan structure itself is worth understanding, because it represents a new template for defense-critical industrial investment.

EXIM traditionally functions as an export credit agency — underwriting loans and guarantees to help foreign buyers purchase American goods. The Make More in America Initiative, launched in April 2022, modified EXIM’s charter to also finance domestic manufacturing with an export-oriented nexus. The six-year loan carries a fixed interest rate tied to the Commercial Interest Reference Rate (CIRR), set five business days before the first drawdown — a rate that stood at 5.38% at signing, producing an estimated all-in annual borrowing cost of approximately 6.86% when EXIM’s 8.9% exposure fee and a 0.5% commitment fee on undrawn balances are included. Up to $25.2 million of the facility covers eligible project costs, and up to $2.2 million finances the exposure fee itself.

What makes this transaction distinctive — the “first deal of its kind” language in the official announcement — is the coordination between two agencies that have not previously worked together for this purpose: EXIM (civilian export credit) and the Department of War’s DPA Title III office. DPA Title III provides grant funding to create or expand domestic production capacity for defense materials; EXIM provides repayable debt financing to make the economics of export-oriented manufacturing viable. Together they cover both the equity and debt layers of a capital stack that a company 6K Additive’s size — still loss-making at the operating level despite rapid revenue growth — could not easily access through commercial lenders. The first EXIM-DPA coordination template, if it produces results at Burgettstown, may be applied to other critical material bottlenecks.

Commercial Demand Is Already Building

The federal financing does not exist in a policy vacuum. Commercial aerospace and defense customers have been placing orders at 6K Additive well ahead of the expansion’s completion, a signal that demand for certified domestic powder is real rather than merely anticipated.

In the first half of 2026, the company’s powder segment generated $9 million in revenue — a 77% increase from $5.1 million in the same period a year earlier. More than 90% of those sales came from repeat orders, and the backlog grew from $7 million in Q1 to $10.3 million in Q2. Nickel powder revenue specifically rose to $1.5 million from $600,000 a year earlier.

On September 30, a week before the EXIM loan was publicly confirmed, 6K Additive and ADDMAN Engineering, a Florida-based advanced manufacturer serving aerospace, defense, and energy customers, announced a 30-month Nickel 718 alloy supply agreement with a minimum value of $8.1 million and a maximum of $10.8 million. The agreement also establishes a revert buy-back program: ADDMAN sends its used Nickel 718 powder back to 6K Additive for reprocessing via UniMelt into new, certified powder. This closed-loop arrangement embeds 6K Additive into ADDMAN’s supply chain in both directions — as a supplier and as a downstream processor of scrap — a relationship structure that becomes more defensible over time as switching costs rise.

Siemens Energy long-term powder recycling agreement committed to sending used nickel alloy powder from its additive manufacturing operations to 6K for recycling, and an unnamed original equipment manufacturer with revenues exceeding $100 million placed a $1.1 million Nickel 718 order for high-precision laser powder bed fusion applications.

IperionX: The Parallel Titanium Play

6K Additive is not the only company receiving layered federal support to build out domestic metal powder capacity for defense. IperionX, which operates a Virginia Titanium Manufacturing Campus, is pursuing an analogous strategy for titanium — the other metal in 6K Additive’s portfolio that appears at scale in hypersonic and aerospace applications.

Under a $47.1 million award from the Pentagon’s Industrial Base Analysis and Sustainment (IBAS) program, IperionX received $12.5 million to equip its Virginia Titanium Manufacturing Campus with titanium deoxygenation, sintering, powder metallurgy consolidation, and near-net-shape component manufacturing systems — targeting more than 1,000 metric tonnes (1,102 short tons) of annual capacity. IperionX also holds a separate Small Business Innovation Research contract worth up to $99 million for titanium parts.

The two companies — 6K Additive for refractory metals and nickel alloys, IperionX for titanium — represent a federal strategy to build redundancy across the specific metals that advanced defense programs require, rather than concentrating investment in a single material. Neither company has yet reached the production volumes that large defense programs would demand at full scale, but both are now funded to try.

What Comes Next at Burgettstown

With the EXIM loan proceeds available immediately for reimbursement of equipment and infrastructure already purchased, 6K Additive expects to achieve initial production from the expanded facility by the end of 2026 — before the January 1, 2027 tungsten ban takes effect. The company’s CEO, Frank Roberts, has described the expansion as designed to serve defense and industrial demand over the next three to five years, with the EXIM loan providing the capital to hire engineers and technical operators the expanded facility will require.

Pennsylvania Congressman Guy Reschenthaler, whose 14th district includes Burgettstown, visited the facility and praised both the project’s contribution to Pennsylvania jobs and its role in strengthening domestic defense supply chains — language that reflects the dual political and industrial significance of a plant that simultaneously creates jobs in southwestern Pennsylvania and addresses a defense supply chain gap that has no domestic equivalent today.

Whether 6K Additive can ramp to 1,000 metric tonnes annually and certify its powders to the quality standards required for full defense production programs remains to be demonstrated. But the federal government has now provided $50.8 million in combined grant and debt financing on the conclusion that the risk of not funding it is greater than the risk of the investment itself.

Frequently Asked Questions

What is UniMelt and how is it different from conventional metal powder production?

UniMelt is 6K Additive’s proprietary microwave plasma system, developed from research at MIT’s Plasma Science and Fusion Center. Unlike conventional gas atomization — which blasts molten metal with high-pressure inert gas and produces irregular, satellite-contaminated particles with 20–40% useful yield — UniMelt creates a uniform 6,000°C (10,832°F) plasma zone that all particles traverse at the same temperature. The result is near-100% spheroidization yield, no satellite contamination, and the ability to process recycled feedstocks including scrap, used AM powder, and failed builds. UniMelt also uses approximately one-third the argon gas of gas atomization and can process refractory metals like tungsten and niobium alloys that challenge conventional processes.

Why does the US need domestic metal powder production for defense applications?

US law will bar tungsten sourced from China from defense procurement effective January 1, 2027, and China currently controls approximately 80% of global tungsten supply. The US also has zero domestic niobium production, importing 100% from Brazil and Canada; niobium is the primary constituent of C-103, the alloy used in rocket nozzles and hypersonic propulsion components. Without a domestic certified powder source, defense contractors face a choice between foreign supply chains subject to geopolitical disruption or program delays waiting for alternatives to qualify. 6K Additive’s expansion is one of the few initiatives timed to be operational before the statutory deadline.

What is the Defense Production Act Title III and why does it matter for this deal?

The Defense Production Act of 1950 authorizes the US government to fund or direct domestic production of materials critical to national defense. Title III specifically allows grants to create, expand, or restore industrial capacity for defense-essential materials — without requiring the receiving company to win a specific defense contract. Combined with the EXIM Make More in America Initiative (a loan program), the two instruments stack non-dilutive grant funding with below-market repayable debt, providing a capital structure that helps early-stage manufacturers scale to defense-relevant volumes before commercial market revenues are sufficient to support conventional financing.

How will the expansion affect the commercial additive manufacturing industry outside of defense?

A fivefold increase in certified, spherical nickel, titanium, and refractory metal powder from a domestic source addresses a bottleneck that has constrained production-scale metal AM across aerospace, energy, and industrial sectors — not only defense. The ADDMAN supply agreement (up to $10.8 million over 30 months for Nickel 718) and the Siemens Energy nickel powder recycling partnership signal that commercial aerospace and energy customers are already treating 6K Additive as a production supplier rather than a prototype-quantity source. Broader domestic supply availability could reduce lead times and improve supply chain traceability for any AM shop working in regulated sectors.