SeAH Aerospace & Defense () is a South Korean manufacturer of aluminum alloy materials and products. The company produces aluminum extrusion and forging products used in aerospace, defense, and other industrial sectors. It was designated as a defense industry contractor by the South Korean government in 1973 and has supplied aluminum alloy products for the country's defense industry.
History
1945: Founded as Siheung Industries 1973: Designated as a defense industry business 2020: Changed company name to SeAH Aerospace & Defense (joined SeAH Group) 2027 (Planned): Completion of Plant 2 in Changnyeong
Products and Applications SeAH Aerospace & Defense manufactures and supplies aluminum alloy materials and components for aerospace, defense, automotive, machinery, and electronics industries.
Aerospace: The company supplies aluminum extrusion products used in aircraft structures, including fuselages, bulkheads, wings, and interior and exterior components. It has supplied products to manufacturers in the global aerospace industry. Defense: It produces aluminum alloy materials and components for defense-related applications, including launch vehicles, weapon systems, and structural materials. Automotive: The company manufactures aluminum products used in automotive components, such as turbocharger parts and hydrogen storage tank components for commercial vehicles. Machinery, Electrical and Electronics: Its products are used in industrial equipment, semiconductor manufacturing machinery, and leisure-related products.
Production Facilities
Changwon Plant The Changwon plant serves as the company's primary production facility for aluminum alloy extrusion and forging products.
Changnyeong Plant The company is constructing a new production facility in Changnyeong, with completion scheduled for the first half of 2027. The plant is planned to include aluminum extrusion and heat-treatment facilities for the production of aerospace-grade aluminum materials used in aircraft structures, including fuselages and wings. According to the company, the facility will also incorporate a rapid-quenching heat-treatment system designed to enhance the mechanical properties of aluminum alloys.
Industry Position SeAH Aerospace & Defense has obtained supplier certifications from aerospace and defense manufacturers, including Boeing, Airbus, Lockheed Martin, and Korea Aerospace Industries. The company supplies aluminum alloy materials and products for commercial aerospace and defense applications. In addition, it entered into a long-term agreement (LTA) with Boeing for the supply of aerospace materials and components.
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