(A) Using the stress-strain data presented below for the SAE 1340 steel water-quenched and tempered, determine the elastic modulus, the yield stress, the ultimate tensile stress, and the percent elongation to failure.
(B) During a tensile test of 1340 steel, at what stress level does dislocation motion begin? Briefly justify your answer.
(C) Suppose Rockwell indentation tests are used to measure the hardness of the 18-8 stainless steel and 17-7PH stainless steel sheet. Which of these will have the larger indent? Why?