Stress-Strain Curve Calculator

Calculate engineering and true stress-strain values, strain hardening exponent, and proof stress from test data.

Load recorded during tensile test.
N
Original gauge section area.
mm²
Original distance between gauge marks.
mm
Measured extension at the load point.
mm
Instantaneous area (for true stress). If unknown, estimate from incompressibility.
mm²

Results

Engineering Stress-MPa
Engineering Strain-mm/mm
True Stress-MPa
True Strain-mm/mm
% Elongation-%
References: ASTM E8 — Tensile Testing; Dieter — Mechanical Metallurgy