# Seah Air Defense Materials to build high-strength aluminum plant in Changnyeong-gun, South Korea

Seah Air Defense Materials announced on October 28, 2025, that it will build a new factory in Changnyeong-gun, Gyeongsangnam-do, South Korea, to produce 770 tons per year of high-strength aluminum materials for aviation. The first-phase investment is about 58.8 billion won, with total investment planned to reach 100 billion won by 2034. Commercial production is scheduled for the second half of 2027.

- Type: New facility
- Announced: 2025-10-28
- Where: Changnyeong-gun, Gyeongsangnam-do, South Korea
- Value: $42.0M (58.8B KRW)
- Starts operating: Q3 2027
- Status: announced
- Capacity: 770 tons per year
- Products: high-strength aluminum materials for aviation
- Sectors: [Aerospace Components](https://endata.com/sectors/aerospace-components.md)

## Companies

- [Seah Air Defense Materials](https://endata.com/companies/88105.md)
- [Boeing](https://endata.com/companies/685.md) (customer)
- [Israel Aerospace Industries](https://endata.com/companies/22308.md) (customer)
- [Embraer](https://endata.com/companies/23129.md) (customer)
- [SeAH Besteel](https://endata.com/companies/42484.md) (investor)

## Sources

- [mk.co.kr](https://www.mk.co.kr/en/business/11453456), 2025-10-28: "We will grow into a leading company in the global aviation industry material field by supplying advanced materials with various specifications."
- [etoday.co.kr](https://www.etoday.co.kr/news/view/2519191), 2025-10-28: "세아베스틸지주가 글로벌 항공기 소재 시장 공략을 위해 총 1000억 원 규모의 신규 투자를 단행한다."

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