This MatFlow workflow is the second in a set of eight workflows developed during our formability study of the Surfalex HF (AA6016A) material. In this workflow, we calibrated crystal plasticity (CP) parameters using experimental data. The hardening coefficient, the initial and maximum CRSS values, and the hardening exponent, as defined in the CP phenomenological power law adopted by DAMASK were optimised. Starting from trial guesses for these parameters, we optimised the parameters with respect to the experimental stress-strain curve of the Surfalex HF material, using a Levenberg-Marquardt procedure. At each iteration of the process, N+1 CP simulations were performed (for N fitting parameters). Five iterations were used in total. This workflow can be downloaded and explored in a Jupyter notebook, as explained in the GitHub repository here.