young's modulus

[visitor]

Hi everyone,

does the modulus of elasticity of steel vary with yeild strength???

I am working on astructure that is to be built with Grade 70 weathering steel (Fy=70ksi) is the "E" value 29000000psi or higer??
I really would appreciate your respose

Thank you all

 

[eureka]

Some references give the value of E as 29 million psi, 29.5 million psi, or 30 million psi. However E is independent of the Yield Stress.

 

[visitor]

Thanks eureka,
that is what i have always known and thought but I have seen the value of 40 million psi in several places for grade 70 which is got me wondering,
thanks though.

 

[LPPE]

What about the E of stainless?>

 

[Ingenuity]

FYI, the E of steel strand and rope is less due the "spring" effect of the rope/strand twist/helix...

E strand is about 20,000 ksi
E rope is about 25,000 ksi

BUT...the E of high tensile THREADED bar (ASTM A722) varies excessively from ASTM standard value of 29,700 ksi.

 

[ben1212]

It would seem that using the lesser value of 29ksi would be conservative.