Technology

JFE EWEL

EWEL is a technology which minimizes toughness deterioration in the HAZ in high heat input welding processes such as submerged arc welding, electro-gas arc welding, and electro-slag welding in shipbuilding and fabrication of bridges, buildings, and other steel structures.

EWEL is composed of three independent technologies based on Super-OLAC.
One of them produces finer austenite grains at the peak temperature of welding, one changes the brittle coarse bainite structure to fine ferrite and bainite structure, and the third improves the toughness of the HAZ matrix by reducing free nitrogen through chemical reaction during the welding thermal cycle.

Each technology, or combination with other technologies, is used according to the customer’s requirement.

Super-OLAC

Good reduction of carbon equivalent offers high weldability and improvement of HAZ microstructures