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Spheroidal graphite cast iron GGG 40 was thermo-mechanically tested using thermo-mechanical simulator Gleeble-3500. Three deformation steps were successively applied on test-specimen at temperatures namely; 900˚C, 850˚C and 750˚C within the austenitic zone, at the same strain rate of 0.1 s −1 . No cracks were observed, up to 50% deformation, after successive deformation steps. Stress-strain relationship obtained is correlated with previous work on SGCI with a different carbon equivalent. It wasdoi:10.4236/msa.2017.83019 fatcat:6vgyk44s7bd47mlt3v64r3a2va