Yield strength by the offset method is computed from a load-strain curve obtained by means of an extensometer. A straight line is drawn parallel to the initial straight line portion of the load-strain curve and at a distance to the right corresponding to 0. 2 percent offset (0. 002 in. Per in. Of gauge length). The load reached at the point where this straight line intersects the curve divided by the original cross-sectional area (sq. In. ) of the tension test specimen if the yield strength.