Hyundai Steel Targets Construction Steel Market with Seismic Reinforcement Rebar

'SD700' Class Ultra-High Strength Seismic Reinforcement Steel Obtains KS Certification

Hyundai Steel obtained KS certification last year for the first time in Korea for the 'SD700' grade ultra-high-strength seismic reinforcement steel.

[Asia Economy Reporter Oh Hyung-gil] Hyundai Steel is aiming to enter the construction steel market with seismic reinforcement rebar it developed.

According to industry sources on the 28th, Hyundai Steel obtained KS certification last year for the first time in Korea for 'SD700' grade ultra-high-strength seismic reinforcement rebar. This product is specialized for buildings over 30 floors, and the company is expanding its supply to the high-rise apartment construction market.

Seismic rebar must withstand shocks and vibrations caused by earthquakes, unlike regular rebar products. The yield strength, which is the limit at which deformed material can return to its original state, is very important.

SD700 rebar refers to rebar with a yield strength of 700 megapascals (MPa) or higher. 1 MPa is the strength that allows 1 cm² of rebar to withstand a weight of 10 kg without deformation. This product has an 11-12% higher yield strength compared to SD600.

Currently, the only companies in the world capable of mass-producing SD700 grade seismic rebar are Hyundai Steel and ArcelorMittal. Most steelmakers have not yet reached the commercialization stage.

The reason Hyundai Steel was able to develop seismic rebar is that it operates the first electric furnace in Korea, securing production data and know-how for long products, and has focused large-scale technological investment and capabilities to ensure the safety of architectural structures.

With ultra-high-strength rebar securing seismic performance, construction companies benefit from greatly improved construction convenience. Complex rebar arrangements are unnecessary when building high-rise buildings such as apartments over 30 floors, large inter-island bridges, and LNG storage tanks.

A Hyundai Steel official explained, "The key to high-strength special rebar is to have marketability," adding, "SD700 seismic rebar is cost-competitive and can be easily used in reconstruction and remodeling apartment construction projects over 30 floors."

This content was produced with the assistance of AI translation services.