“SeAH Aerospace & Defense” (hereinafter Company) understands the importance of the personal information of customers and we observe the laws related to the “Act on Promotion of Information and Communications Network Utilization and Information Protection, etc”. Company shares how and why personal information that you provide is used and what measures are taken to protect your personal information through the personal information handling policies. In the event that there are revisions to the personal information handling policy, Company shall notify such information via website announcements (or individually).
This policy is effective as of February 1, 2023.

Personal information collected : Name, phone number, e-mail
Purpose of collection and use of personal information : Customer inquiries
Possession and usage period of personal information : Once the purpose of possession and usage period of personal information is achieved, the corresponding information shall be destroyed immediately.

About us


Company specializing in the manufacturing of high-strength aluminum extrusion materials

We specialize in the production of high-strength aluminum extrusion products used not only in the aviation and defense industries, but throughout all industries. In addition to Korea’s top aluminum alloy production capacities, we also possess world-class quality competitiveness and we are a leader in the aluminum alloy materials sector.


Providing optimized
total solutions for

Based on over 70 years of experience, we have accumulated unparalleled expertise in process control such as extrusion for aluminum alloys. We offer specialized total solutions optimized to customers based on leading advanced technologies and expertise that can be applied to a wide range of industries.

CEO Message

We will create a better world with innovative technologies and valuable products.

SeAH Aerospace and Defense has enhanced its competitiveness by specializing in the production of aluminum alloy extrusion and forged products that are used broadly such as advanced industries like petrochemicals, semiconductors, and power generation, as well as future industries such as aerospace, defense, and renewable energy.

As an aluminum materials company, we are providing customers with higher values through ceaseless technological innovation so that we can become a leader in new industries of the future.

We will continue facility investments and conduct ongoing R&D to focus on developing aluminum alloys and improving quality, while acquiring world-class technology and quality competitiveness to become a/eng global leading company of aluminum materials.

Furthermore, based on SeAH’s core values of honesty, passion, and skills, we will aim for mutual growth the community and fulfill our roles and responsibilities as a corporate citizen.

CEO Sung Chang-mo

Manufacturing base

  • HQ

    48, Jeondong-ro, Seongsan-gu, Changwon, Gyeongsangnam-do

    Main products
    Extrusion products, aircraft materials, seamless tubes, processing parts materials, aluminum rings, propulsion part testing, etc.

    Production capacity
    10,000 tons annually

    Specialized facilities
    Possesses attached technology institute

Promotional video

Promotional video


1945 - NOW

AIRBUS DEFENSE & SPACE Obtaining Approval
Changed company name to SeAH Aerospace and Defense
Oct 30, Acquired SeAH Besteel
Changed company name to Arconic Korea
Acquired Alcoa of the US
Changed company name to Doore Air Metal
Acquired BOEING approval (full-fledged aviation business)
Began operation of Changwon Plant
Completed construction of Changwon Plant
Designated as defense industry business
Changed company name to Samsung Industries
Founding of Siheung Industries