Raw data for paper on EAC of as-quenched Mn-B steel

Different types of data measured as part of the work on a paper on SCC/HE of a commercial wear part made for the outdoor environment. The goal was to determine the failure mechanism by performing a failure analysis of the weart part including materials characterisation of generic specimen geoemtries. The investigated microstructure was as-quenched Mn-B steel having 0.35 wt.-% carbon with an ultimate tensile strength of 2.1 GPa. Most data stored here are based on tests using generic specimen geometries, not tests on the commercial wear part itself. The only two exceptions are the 2d hardness map and the chemical measurement using EPMA, which were done on actual wear parts. Four-point bent beam (FPBB) testing and slow strain-rate testing (SSRT) were conducted in aqueous 3.5 wt.-% NaCl solution to test the cracking susceptibility of the microstructure in different environmental conditions and at various stress levels. While conditions for SSRT included cathodic and anodic polarisation and OCP in aerated and deoxygenated solutions, all FPBB testing was done in the aerated OCP condition. For SSRT, the reduction of mechanical properties was almost the same for every environmental condition tested even though the hydrogen evolution rate was expected to vary by orders of magnitude. FPBB testing showed that a decarburised and oxidised surface had a considerably higher threshold stress compared to a ground surface. The correct diameter of all tensile specimens are provided in the processed data.