How do i draw a strees strain graph? for mild steel?

Question

How do i draw a strees strain graph? for mild steel?

Answer 1

Material properties are tested, not calculated. Make a sample, run it through a tensile test machine.

Answer 2

Basically, you are just graphing Hooke's Law (i.e. stress = strain * Modulus) where Young's Modulus is the slope of the line.

So, just plot y = mx + b where b is equal to zero, m is Young's Modulus, x is strain, and y is stress.  You will get a straight line up to the yield stress where the line should will get flatter (i.e. slope approaches zero) up to the point of the ultimate strength of the material.