The increased utilization of reinforced concrete in modern infrastructural development necessitates precise mechanical characterization of construction-grade iron materials. This paper presented tensile properties of two 9.9 mm and 9.2 mm Iron TMT (thermo-mechanically treated) rod samples. Iron TMT rods are vital in civil engineering due to their improved strength and ductility. Mechanical properties presenting tensile strength, yield stress, elongation, and the UTS/YS ratio were tested according to IS 1786 for 9.9 mm and 9.2 mm diameter Fe 500 grade bars. Sample 1 was found to have a tensile strength (UTS) of 547.0 N/mm², yield stress (YS) of 488.0 N/mm², and elongation of 19.92%, while sample 2 was found to have a UTS of 529.7 N/mm², YS of 470.5 N/mm², and an elongation of 18.60%. The experimental work illustrated both samples exceeded the standard Fe 500 grade tensile requirement and elongation but were slightly below the yield standard, closer in specification to Fe 415 grade. The elongation is high, and the UTS/YS ratio demonstrates some good ductility and strain-hardening performance, which is favorable for seismic activity and heavy loads. The results further indicate that even a single tensile test performed on a sample can provide useful information about structural capacity, behaviour and conformity against standards, hence a useful procedure to ensure proper construction quality assurance.
Sardar Shakthi Singh (2026) studied this question.