# Question: an aisi 4142 steel qampt at 427c exchibits syt ...

###### Question details

An AISI 4142 steel Q&T at 427C exchibits S(yt) = 235 MPa,
S(yc) = 285 MPa, and **ε**f = 0.07.

For the given state of plane stress, (a) determine the factor of safety, (b) plot the failure locus and the load line, and estimate the factor of safety by graphical measurement.

*σx = 150 MPa , σy = -50 MPa , T*xy = 0 MPa

Book: Shingley's Mechanical Engineering Design (Tenth edition in SI units)