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Re: yield stress

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>can anybody give me an idea of actual yield stress value of
>Mild steel flats that is commonly in practice for fabrication purpose
>in INDIA.
You might want to be real careful with anything called 'mild' steel. In 
the states, the term is a catch-all for steel having no specific 
chemistry to render it hardenable or corrosion resistant. It could be 
full of sulphur or lead for machinability, which makes it non-weldable; 
the carbon level or carbon equivalent could also render it non-weldable 
or non-suitable for any particular structural purpose. In any event 
without a specific chemistry the yield strength could be anything from 20 
to 50 ksi. 

Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw(--nospam--at)        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)