A tensile bar of a class 40 gray iron casting is found to


1. Define cast iron using the Fe-Fe3C phase diagram

2. What are the different types of cast irons? Explain using a sketch.

3. A tensile bar of a class 40 gray iron casting is found to have a tensile strength of 50,000 psi. Why is the tensile strength greater than that given by the class number? What do you think is the diameter of the test bar?

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Mechanical Engineering: A tensile bar of a class 40 gray iron casting is found to
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