ReElement Posco Magnet Production JV Targets Integrated US Rare Earth Supply Chain

ReElement, Posco

ReElement Posco magnet production plans will create a new US-based platform for rare earth separation, metallization and permanent magnet manufacturing. ReElement Technologies has formed a joint venture with South Korea’s Posco International to develop integrated rare earth and magnet capacity in the US.

ReElement Posco magnet production is strategically important because the US still lacks a complete domestic supply chain for rare earth magnets. Mining and separation alone are not enough. The country needs oxide refining, metal production, alloying and finished magnet manufacturing.

ReElement Posco magnet production will be backed by a planned $200mn investment. The partners are still finalising site selection, while ownership details have not been disclosed.

The joint venture aims to produce around 3,000 t/yr of separated rare earth oxides by 2028. Capacity is expected to expand to 6,000 t/yr by 2030.

Separation and Metallization Fill Key US Supply Gaps

The joint venture will develop feedstock sourcing, light and heavy rare earth metallization and permanent magnet manufacturing. This gives the project a wider scope than a conventional refining facility.

Separated rare earth oxides are an important step, but magnet supply chains require further conversion. Oxides must be turned into metals, then alloys, then finished magnets before they can serve automotive, defence, industrial and electronics customers.

Metallization remains one of the biggest bottlenecks outside China. Without it, separated oxides cannot easily become usable magnet inputs.

ReElement will contribute its separation and refining technologies to the joint venture. This gives the project a technology platform for producing refined rare earth products in the US.

The inclusion of both light and heavy rare earth metallization is also important. Heavy rare earths such as dysprosium and terbium are critical for high-performance magnets that must withstand heat and stress.

Posco Adds Automotive and Industrial Market Access

Posco International brings strong relationships in automotive and industrial markets. That customer access is important because rare earth projects need demand visibility, qualification pathways and long-term commercial outlets.

The partnership also adds South Korean industrial depth to the US rare earth strategy. South Korea is a major manufacturing economy with strong positions in automotive, batteries, steel, electronics and industrial materials.

For US magnet supply chains, the JV could help connect rare earth processing with downstream users that need qualified, reliable and non-China material. That is increasingly important as manufacturers seek supply security around electric motors, robotics, defence systems and industrial automation.

The 2028 and 2030 capacity targets show a staged approach. The first phase would establish oxide separation, while later expansion could support deeper integration into metal and magnet production.

Execution will be the key test. The project must secure feedstock, complete site selection, scale technology, qualify products and build customer confidence.

If successful, the ReElement-Posco venture could become a meaningful building block in the US effort to create a complete rare earth magnet supply chain.

The Metalnomist Commentary

The ReElement-Posco JV shows that rare earth strategy is moving from isolated projects toward integrated industrial partnerships. The decisive advantage will come from connecting feedstock, separation, metallization, magnets and qualified customers in one supply chain.