Instrumented nanoindentation is extensively used to establish the localized mechanical properties of metal powder particles. The indentation technique is inadequate to comprehend the complete stress-strain behavior of a powder particle. The finite element method (FEM) is largely employed to recognize the stress-strain characteristic by simulating the indentation conditions. Such an approach requires complex material models which are data intensive and involves certain mathematical approximations. This paper uses experimental nanoindentation with analytical FEM to simulate the stress-strain field evolved in the metal powder and extract the corresponding stress-strain curves. The 3D visualization of the stress-strain field aids in quantifying the extent of volumetric elastic and plastic deformation around the indent. To develop this methodology, experimental nanoindentation was performed on Al 1100, Al 6061, and Al 7071 aluminum alloy powders to establish basic material properties as an input to formulate a simple bilinear isotropic hardening plasticity material model for FEM. The simulated force-displacement (F-D) data is in good fit with the experimental F-D data, thus validating this unique methodology. The outcome of this study shows that with limited experimental data and using a simple material model for FEM, the solution readily converges to give reliable stress-strain characteristics even at nanometer length scales. Our methodology can increase the turnover in the advancement of engineering powder technology, bypassing extensive experimental groundwork.