Heat-treated sample (different heat treatment sequences) were tested for various mechanical properties. For hardness testing, oxide layers etc. formed during heat treatment were removed by stage-wise grinding. Average HRC readings were determined by taking five hardness readings at different positions on the samples, using a digital Rockwell hardness tester. For tensile properties, standard tensile specimens were loaded into a 60-kN universal testing machine hooked up to a data logger. Load-elongation data were recorded and converted into stress-strain graphs. Ultimate(tensile)strength, and ductility (% elongation) were determined from these graphs, reported values being average of three readings. All testing was done in accordance with ASTM standard test procedures.