If it is assumed that the plot in figure is for noncold-worked brass, determine the grain size of the alloy in Figure 7.19; assume its composition is the same as the alloy in Figure 7.15.

140 120 900 800 1040 Steel 120 1040 Steel 800 700 100 700 600 100 80 500 600 Brass 80 60 Brass 400 500 Copper 300 60 400 40 Copper 200 300 40 - 20 100 200 10 30 40 50 60 70 10 20 30 40 50 60 70 Percent cold work Percent cold work (b) la) 70 60 Grain size, d (mm) 5 x 103 30 102 10- 50 200 40 150 20 Brass 30 100 20 10 50 1040 Steel 10 Copper 12 16 10 20 30 40 50 60 70 d-1/2 (mm-1/2) Percent cold work (c) Ductility (%EL) Yield strength (MPa) Yield strength (ksi) Yield strength (MPa) Tensile strength (MPa) Vield strength (ksi) Tensile strength (ksi)