Material Test Report Mechanical Info

<...Is the elongation at failure or at the 0.2% yield?...>

It is not possible to say without knowing details about the material being stretched and its temperature.

• If it were, say, glass at ambient temperature, then it might not get to 0.2% before catastrophic failure. Raise the temperature high enough and the glass will undergo plastic deformation well before failure.
• If it were, say a rubber band at ambient temperature then it might get to 300% or even 400% before failure. If it were raised to the same temperature in air as the glass above, then it will catch fire before any extension is applied.

<...want to calcuate E at the elastic portion of hooks law....>

E is the gradient of the elastic portion of the line on the stress/strain diagram for the material in question at the temperature stated thereon. There is no need to calculate it for many common materials as it can be looked up; one suggestion as to where is Kempe's Engineers' Yearbook, any edition.

http://en.wikipedia.org/wiki/Poisson%27s_ratio

<...the reduction of area is 40% example what does that tell...>

Absolutely nothing more than that on its own. One needs either the extension to calculate Poisson's Ratio or one needs Poisson's Ratio to calculate the extension; that's the reason the property is called a "ratio".