1. Name three important microstructures of steels, and how they are obtained. 2. What do the numbering system used in AISI Steel-Name convention represent? What is the composition of a 1040 steel and a 4340 steel? 3. What is the purpose of process annealing and how is it achieved? What steel microstructure is obtained when annealing a hypo or hypereutectoid steel? 4. Why do surface cracks develop when a steel is quench to form martensite? Would you expect this problem in thin or thicker parts? 5. Why do high carbon steels have low hardenability? 6. List the three surface treatments of steels and their purpose. 7. Explain why low carbon steels have lower hardenability than medium/high carbon steels. 8. List the types of stainless steels and their typical composition. 9. What are the two reactions (phase transformations) from which cast irons come from? 10. Why do gray cast irons have very low ductility?