Abstract: This research presents the effects of heat treatments on the mechanical properties of `mild steel. Sample of mild steel rods were subjected to the following heat treatment. Sample of these specimens were annealed at temperature of 100, 300 and 500°C while others were heated to 900°C and quenched in SAE 40 oil. Some of these specimens were retained as-quenched while others were tempered at temperature of 200, 400 and 600°C. The heat treated mild steel rod were then subjected to tensile, impact and torsional test the results of these tests show that stress and ultimate decreases as both annealing and tempering temperature increases. Also the percentage elongation increases as the annealing and tempering temperature increases. Moreover, the impact energy and the breaking torque increases as the tempering and the annealing temperature increases.
A. Adebayo and J.T. Stephen , 2008. Effects of Heat Treatment on the Mechanical Properties of Mild Steel. Research Journal of Applied Sciences, 3: 162-166.