Hyundai Steel Company earns Korea’s first KS certification for fire-resistant, seismic H-beams

[Financial News] Hyundai Steel Company has become the first company in South Korea to obtain national standards (KS) certification for structural H-beams designed to withstand fires and earthquakes. The certified product is 355-megapascal (MPa)-grade steel with fire-resistant properties that enable it to retain at least 67% of its room-temperature yield strength at 600°C.
Hyundai Steel Company said on the 12th that its fire-resistant, seismic H-beam, SHN355FR, produced at its Incheon plant, had received certification under KS D 3866, the national standard for hot-rolled structural steel sections for building construction. Hyundai Steel Company’s Incheon plant became the first in South Korea to obtain certification for fire-resistant, seismic H-beams under the standard, revised in 2024.
SHN355FR combines the deformation capacity required of structures during earthquakes with the ability to retain strength in the event of a fire.
The certification is based on KS D 3866, revised by the Korean Agency for Technology and Standards in July 2024. The revised standard newly added fire-resistant, seismic steel sections (SHN-FR) with yield strengths of 355–460 MPa, in addition to the existing seismic steel sections (SHN).
Hyundai Steel Company expects that using fire-resistant, seismic H-beams in buildings will improve structural safety while reducing the amount of fireproofing materials used and simplifying construction processes.
Hyundai Steel Company plans to expand the strength and thickness ranges of its fire-resistant, seismic steel and advance its manufacturing technology.

[email protected] Kim Mi-hee Reporter