“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.


As a trailblazer in high-strength aluminum alloy extrusion, we provide optimized,
and high quality extrusion products, leveraging over 70 years of accumulated expertise.


Extrusion capabilities to suit various shapes and applications

Our extrusion products are tailored to meet specific customer requests, ensuring various shapes (round, bar, tube, profile, etc.) and applications. These products, produced by SeAH Aerospace & Defense, find applications in numerous industries, including aerospace and defense.


Customized extrusion product manufacturing system

We produce extrusion products for our customers, utilizing equipment optimized for high-strength aluminum alloy extrusion and employing the best production technologies and know-how to maintain the highest quality.

Since obtaining special defense industry designation in 1973, SeAH Aerospace and Defense earned Boeing's OEM approval in 1996 as a specialized extrusion business. Our expertise and technological knowledge, cultivated within the aerospace and defense sectors, enable us to offer tailored solutions to our customers based on these strengths.

Main products

  • Category


  • 1XXX

    1050, 1070, 1100

  • 2XXX

    2007, 2011, 2012, 2014, 2014A, 2017, 2024, 2026, 2214, 2219, 2618, 2618A

  • 3XXX


  • 4XXX

    4032, AHS1, AHS2, A332, A356, AP2, 4045

  • 5XXX

    5052, 5056, 5083, 5086, 5AAA, 5356, 5454, 5456

  • 6XXX

    6005, 6013, 6020, 6026, 6042, 6061, 6063, 6066, 6070, 6082, 6101, 6106, 6262, 6262A, 6351

  • 7XXX

    7001, 7003, 7010, 7050, 7055, 7068, 7075, 7085, 7129, 7150, 7175, 7474, TH72M, CE75, CE76

* CE75, CE76 - Specially designed for consumer electronics

  • Category


  • Non-Heat Treated


  • H111, H112, H32, H34

  • Heat Treated


  • T3, T351, T3510, T3511

  • T4, T4(BD), T451, T4510, T4511

  • T5

  • T6, T6(BD), T62, T651, T6510, T6511

  • T7, T73, T7351, T73510, T73511, T76, T76510, T76511

  • T8. T81, T815, T8510, T8511

  • T9

* ASTM, SMS Standard specification quality assurance available