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Finding yield strength with modulus of elasticity

  1. Oct 18, 2014 #1
    1. The problem statement, all variables and given/known data
    Grade 1020 Steel has a yield strength of 42ksi and E modulus of 30 mpsi. Another grade of steel has yield strength 132 ksi. What is its E modulus?

    2. Relevant equations

    This is the equation i should be using to find e modulus I thing
    3. The attempt at a solution
    I don't see how there are enough variables to find the E modulus, and I thought since all steel is primarily composed of iron that the e modulus would always be the same.

    Thanks in advance for any advice. I am a freshman studying mechanical engineering, this is my first post here. This seems like a great site!!
  2. jcsd
  3. Oct 18, 2014 #2


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    Staff Emeritus
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    Homework Helper

    Your equation doesn't make sense. For a purely tensile loading, however, the deflection δ = FL/AE

    This appears to be a trick question, insofar as E is concerned.
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