# SeAH Aerospace & Defense to build high-strength aluminum plant in Changnyeong, South Korea

SeAH Aerospace & Defense Materials will build a new high-strength aluminum plant in Changnyeong, Gyeongnam Province, with phase 1 investment of KRW 58.8 billion and annual capacity of 770 tons. Commercial production is set to begin in the second half of 2027.

- Type: New facility
- Announced: 2025-10-28
- Where: Changnyeong, Gyeongnam Province, South Korea
- Value: $44.0M (58.8B KRW)
- Starts operating: Q3 2027
- Status: announced
- Capacity: 770 tons per year
- Products: high-strength aluminum for aircraft fuselage and wing structures
- Sectors: [Aerospace Components](https://endata.com/sectors/aerospace-components.md), [Steel and Metal Products](https://endata.com/sectors/steel-metal-products.md)

## Companies

- [SeAH Aerospace & Defense Materials](https://endata.com/companies/88101.md)
- [SeAH Besteel](https://endata.com/companies/42484.md) (investor)
- [SeAH Besteel](https://endata.com/companies/42484.md) (partner)

## Sources

- [seah.co.kr](https://www.seah.co.kr/eng/pr/detail-page?idx=429), 2025-10-28: "On October 28, the company revealed that its subsidiary, SeAH Aerospace & Defense Materials, Ltd., will build a new high-strength aluminum plant in Changnyeong, Gyeongnam Province, with an annual production capacity of 770 tons."
- [seah.co.kr](https://www.seah.co.kr/eng/pr/blog/seah-aerospace-materials-aluminum-plant), 2025-11-01: "SeAH is formally shifting its future growth engine toward the aerospace and defense materials sector."
- [idomin.com](https://www.idomin.com/news/articleView.html?idxno=951435), 2025-12-01: "This is an opportunity for SeAH Aerospace & Defense Materials to leap forward as a center of the aviation and defense materials industry."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.