Answer Happy

Use the iron-iron carbide phase diagram shown in Fig. 9.24, page 287, Callister's book, 10th edition to perform several tasks The carbon content (Co) in a carbon-steel specimen having fm(Fe3C) = * 5 puntos 0.131 cementite (Fe3C) at just below the eutectoid temperature, say, at I = 726°C < 727°C, is Co = 0.90%C Co = 0.80%C Co = 0.69%C None of the options The carbon steel designation is * 5 puntos AISI 1080 AISI 1060 о AISI 1090 O None of the options The weight percent (%) of carbon in ferrite (a-phase) at T = 726°C is * 5 puntos Ca -0.022%C Ca 0.032%C Ca -0.012%C None of the options The weight percent (%) of carbon in ferrite (Fe3C-phase) at T = 726°C is * 5 puntos C(Fe3C) = 6.70%C C(Fe3C) = 4.56%C Ο Ο Ο Ο C(Fe3C) - 5.70%C None of the options The total mass fraction of ferrite in the steel at T = 726°C is * 5 puntos fm.a = 1.24 fm.a = 0.87 fm.a = 0.98 O None of the options