A 1050 steel should be austenitized at 820 ˚C, quenched in oil to 25 ˚C, and tempered at 400 ˚C for an appropriate time.
(a) What yield strength, hardness, and % elongation would you expect to obtain from this heat treatment? (See Figure 13-9)
(b) Suppose the actual yield strength of the steel is found to be 125,000 psi. What might have gone wrong in the heat treatment to cause this low strength?
(c) Suppose the hardness is found to be HB 525. What might have gone wrong in the heat treatment to cause this high hardness?