Development and characterization of Fe500S TMT Rebars

Abstract

New varieties of high-strength rebar Fe500S with superior seismic resistance properties have been developed to meet future needs of construction in seismic prone areas. Billets were produced by standard steel making process route (BOF-LF-CC) with the exception of chemical designing, which was uniquely improvised so as to reduce the alloying cost. Reheated billets were rolled into final TMT rebars by varying the operation parameters such as velocity and quenching rate. Chemical properties, Surface morphology, and Mechanical properties of the thus-produced TMT rebars were studied by OES (Spark Analysis), Optical Microscopy, Tensile, and Hardness tests. Cost analysis showed attenuation in the alloying cost by a margin of Rs. 855 per ton. Mechanical properties as evaluated from tensile tests also yielded a positive outcome in the form of better tensile strength (UTS/YS ratio) and hardness. All the results were compared with the Indian Standard IS 1786:2008.