DUCTILITY AND MECHANICAL CHARACTERISTICS OF STEEL, GRADE S500s

The term ductility expresses the ratio of the field of plastic deformations to the field of elastic deformations of steel for the reinforcement of concrete, which is determined by the tensile test. Reinforced concrete ductility is the capability of a reinforced concrete entity to respond to greater post-elastic deformations without a significant reduction in the carrying capability. That is, ductility is a characteristic of steel, while reinforced concrete ductility is a characteristic of a reinforced concrete entity.

Steel ductility enables the reinforced concrete to acquire ductility.

The new requirements concerning earthquake-resistant constructions , that is constructions with increased ductility, are set by regulations Eurocode 8 and EKOS 2000 and are included in the National regulation “Steel for the reinforcement of concrete” (KTX 2000). Through the implementation of the above mentioned regulations, Halyvourgiki is currently producing two different types of steel for the reinforcement of concrete of high ductility (class C), which is steel with a higher ratio of tensile strength to yield strength (ft/fy) and has a higher value of uniform elongation (ε _u,k).

The first type is hot rolled steel which is immediately heat treated during the process and the other type is hot rolled vanadium alloyed steel which has a higher ductility and advantages such as:

The table below provides the characteristics expressing the ductility of steel of grade S500s or B500C produced by HALYVOURGIKI as well as the ones specified by the national standards ELOT 971 and ELOT 1421-3.