Corrugated bars are obtained through a heat treatment process based on controlled cooling, which improves their mechanical properties and structural behaviour.
They are mainly used in concrete structures and are usually classified as 400 or 500, depending on their characteristic strength.
Corrugated Steels
According to Eurocode 2, corrugated bars are considered high-ductility steel, making them an ideal material for use in conjunction with concrete, providing adhesion, strength and deformation capacity.
Corrugated bars are identified by several distinctive features:
• Corrugations: grooves along the longitudinal axis that improve adhesion.
• Fins: continuous ridges parallel to the longitudinal axis.
• Core: central part of the bar that is not affected by the corrugations.
In addition to these elements, corrugated bars are defined by a series of technical parameters that determine their structural behaviour:
• Maximum corrugation height (a)
• Maximum fin height (a1)
• Corrugation spacing or inclination
• Nominal bar diameter
All these factors influence the adhesion, strength and load-bearing capacity of steel within concrete, ensuring reliable performance in any structure.