We make
Next
Generation
Dong Seo Heat Treatment is continuously advancing based on its core values of Human, Safety, and Technology.
About Us
We add technology and quality to the essence of manufacturing,
always prioritizing our customers’ success.
We build sustainable systems and
an organizational culture while practicing honest and
transparent management.
We are a company that creates not products, but trust.
With 40 years of manufacturing history, Dong Seo Heat Treatment is now preparing for a new leap forward beyond its maturity. We aim not only to accumulate technology but also to become the leading role model in Korea by innovatively transforming the root industry into a modern business.
A Choice for Tomor,
A Commitment Beyond ESG
A Commitment Beyond ESG
Dong Seo Heat Treatment’s promise for a sustainable future!
We raise everyone’s value through environmental protection, people-centered management, and transparent governance.
Industrial Sector
We are not a company that only makes products.
We will put our customers’ success first and provide trust, quality, and lasting satisfaction.
Dong Seo Heat TreatmentThe name of passion and technology toward the world
We are creating the future with precise technology and unwavering trust
A Space that Sets the Standard for Technology
Introducing the Facilities of Dong Seo Heat Treatment
Introducing the Facilities of Dong Seo Heat Treatment