Plain concrete without reinforcement is like a body without bones. Steel reinforcement is one of the best forms of reinforcement to take care of all kinds of stresses generated in a structure.
To make the structure strong and long lasting, the steel rods must be of good quality and strength. It is advised that the same type and grade of steel should be used in a structural member. Ask your engineer to do the reinforcement detailing for earthquake resistant construction, if your house is located in seismic zone III, IV or V. Special rebars which have better UTS?YS ratio can be used in such constructions. TATA TISCOM Super Ductile rebar is one such rebar available.