This dataset contains supplementary CSV files generated during the statistical analysis of hydrodynamic cavitation erosion experiments on UHPC and UHPFRC, conducted using a cavitation jet apparatus. The dataset includes processed experimental data, data cleaning records, and statistical outputs used to evaluate erosion resistance. The files document multiple stages of the analysis workflow, including removal of outliers, flagged datasets, cleaned data, and sensitivity analysis summaries. In addition, the dataset contains results from statistical tests such as normality assessment (Shapiro–Wilk), variance homogeneity (Levene test), ANOVA and Kruskal–Wallis tests, post hoc comparisons (Tukey and Dunn tests), effect size estimation (Cliff’s delta), and bootstrap resampling for both mass loss and erosion depth metrics. All files are provided in CSV format to ensure transparency, reproducibility, and validation of the analytical procedures. This dataset is part of a comprehensive experimental and analytical framework developed during the PhD research project on hydrodynamic cavitation erosion and mechanical characterization of UHPC and UHPFRC, including cavitation jet testing, fracture analysis, pullout behavior, and statistical modeling.