Molten aluminum is to be injected into a steel mold under pressure (die casting). The casting is essentially a 12-in.-long, 2-in.-diameter cylinder with a uniform wall thickness, and it must have a minimum tensile strength of 40,000 psi. Based on the properties given in Figure 9-7, design the casting and process.

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Tensile strength (ksi) 50 46 42 38 34 30 26 0 Tensile strength % Elongation 30 25 20 15 10 5 10 0.005 0.010 0.015 Secondary dendrite arm spacing (cm) % Elongation