Finding yield strength with modulus of elasticity

[nlipshutz]

Homework Statement

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?

Homework Equations

E=FL/EA

This is the equation i should be using to find e modulus I thing

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!

 

[SteamKing]

Homework Statement

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?

Homework Equations

E=FL/EA

This is the equation i should be using to find e modulus I thing

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!

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.