10. (15 pts) Utilizing the information we have discussed all semester, as well as the information in your text,choose the most appropriate material for the following application. You need to

design an economical internal combustion (IC) engine exhaust valve that must withstand temperatures greater than 500 °F, has a yield strength greater than 300 MPa, has a hardness of at least 200 HB, and has a moderate wear resistance. Narrow it down as-far you reasonably can (be very specific in heat treatment, alloy details, etc., listing a generie material like "steel"will earn you no points) and justify all decisions based on referencing specific figures/data in your text. Place your answer in the box below to receive full credit.