You have a SAE 1020 material that you austenize and then rapid quench the final phase would be a Martensite b. Pearlite e Bainite d. BCT e. BCC 54. A SAE 1077 material that is slow quench from the from 1650F will have a crystal structure of a Martensite b. Pearlite C. BCC d. BCT e. Ferrite & Cementite 55. How long do you temper an alloy steel a Until you get the properties you want b. 2 hours c. 20 hours d. 20 minutes e. Depends on the material there all different 56. Refer to the following chart. What is the tempering temperature to achieve a yield strength of 200ksi in a 4140 material a. 400 b. 600 c. 800 d. 1000 e. 1200 EWhat is its percent elongation a. 0

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