Excel spreadsheet containing all the input data required for the models detailed in the manuscript as well as the output data obtained from the different alloys considered. Input data include grain size, precipitate size and volume fraction and alloy compositions; all obtained from the literature (references in the manuscript). The compositional ranges investigated in the manuscript are also given in the “input data” tab of the spreadsheet, as are the coefficients used to predict the solid solution strengthening contributions of each alloy (obtained from the literature, as referenced in the manuscript). When varying the content of the element Ta, two extra intermediate compositions were investigated to provide further data points. The “output data” tab provides all the raw data obtained using the models introduced in the manuscript, using the “input data” described above. The total contribution of each strengthening mechanism for each alloy is given, along with the contributions as the bulk alloy composition is changed (as depicted in Figures 5, 6, 7, 8 and 10 of the manuscript). The volume fractions obtained within the compositional range studied are also given. In tab “Figure 3” of the spreadsheet, the data obtained for Figure 3 of the manuscript are given. Increments of 0.02 for the exponent (see Equation 3 in manuscript) were chosen. The experimental alloy yield strengths obtained from the literature are also included. In tab “Figure 9” of the spreadsheet, the data obtained for Figure 9 of the manuscript are detailed. Units are in MPa (strength), % (volume fraction) and nm (size) unless specified. “sec” and “ter” refer to the secondary and tertiary gamma prime phase respectively.