A tension test was performed on a steel specimen having an original diameter of 12.5mm and gage length of 50mm. Using the data listed in the table, plot the stress-strain diagram, and determine approximately the modulus of toughness. Use a scale of 20 mm = 50 MPa and 20 mm 0.05 mm/mm.

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Load (kN) Elongation (mm) 0 0 11.1 0.0175 31.9 0.0600 37.8 0.1020 40.9 0.1650 43.6 0.2490 53.4 1.0160 62.3 3.0480 64.5 6.3500 62.3 8.8900 58.8 11.9380