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Reinforcing Steel Introduction

There are six main categories of steel reinforcement used in reinforced concrete construction in UK, namely:

  • Carbon steel bars (plain and deformed)
  • Cold reduced plain and deformed steel wire
  • Fabric
  • Stainless steel bars and fabric
  • Galvanised carbon steel bars and fabric
  • Epoxy coated carbon steel bars

Carbon steel bars include plain round mild steel bars (Grade 250) and deformed high yield steel bars (Grade 460) (To compare to the Eurocodes, the characteristic strength is increased to 500 N/mm2.), in which high yield bars are produced by one of two processes: Hot rolling or cold working. Cold reduced plain and deformed steel wires (grade 460) are mainly used in the production of fabric reinforcement.

Steel fabric reinforcement is normally produced from cold reduced steel wire (grade 460) with a regular mesh arrangement. Stainless steel bars, galvanised carbon steel bars and fabric and epoxy coated carbon steel bars are intended to provide enhanced corrosion resistance.

EN1992-1-2 (2003) only covers the material properties of carbon steel reinforcing bars at elevated temperatures, but not other types of reinforcement. Basically, the code treats hot rolled rebar as the hot rolled carbon steel, but introduces different models to cold worked rebar.


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