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Grade of Reinforcement Bar

 

Grade of reinforcement Bar

 

In construction firms steel plays a very important role as Rebar (Reinforcement bar) in R.C.C. Well known fact that is concrete strong in compressive and weak in tensile to counter the tensile force reinforcement is applied in concrete, that reinforced material is steel. For a normal Residential building(750 sq.ft) itself a minimum 8-10  tons Rebar steel are required.

 


First steel grade is Fe250 mild steel, this type of steels are used in the starting stage of Reinforced cement concrete. After that Fe 415 TMT  Bars came to the usage. At present construction of heavy structures there is a need for high grade bars.


Grade of Steel (presently available in indian market)


  1. Fe 500

  2. Fe 550

  3. Fe 600

  4. Fe 500D

  5. Fe 550D

  6. Fe 500 HCR

  7. Fe 550 HCR

  8. Fe 600 HCR

  9. Fe 415S HCR

  10. Fe 415S HCR

  11. Fe 500S EQR

  12. Fe 550S HCR EQR



D = Ductility


Fe 500D or Fe 550D this type of bar mostly used in R.C.C structure in Building.


HCR = High Corrosion Resistance


Fe 500 HCR, Fe 550 HCR and Fe 600 HCR this type of bar mostly used in marine and coastal, to avoid corrosion.


EQR = Earthquake Resistance


Fe500 EQR is a current trend bar in SAIL, this type of bar used in earthquake Zone.



Currently most of the government project Fe 500 D steels are recommended, but if you order in SAIL for Fe 500D, they will supply Fe 500 EQR most of the engineers are confused on that time whether some mistake happened in order placing. But there is no issue on that, Fe 500 EQR is  good in ductility and additionally it will withstand earthquakes also.



Article BY


Pandi Rajendran B.E









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