<p>Intercritical austempered ductile iron (IADI) is a recent variant of austempered ductile iron (ADI) developed to address the challenges associated with machining. This material features a metallic matrix composed of free ferrite and ausferrite. Even though IADI can be produced to dimensions and shapes close to final specifications, achieving precise tolerances is sometimes required. The heat treatment process can induce deformation and dimensional changes, which may increase the workpiece’s initial hardness. Under these conditions, abrasive machining, such as grinding, is often one of the most suitable finishing processes. Research on grinding of IADI is sparse. This study presents a novel investigation into the surface integrity of IADI samples subjected to surface grinding under different wheel speeds and work speeds. An evaluation of specific cutting energy, surface finish, hardness alterations, and microstructural changes was conducted. ADI grinding data was reported for comparison purposes. Results indicate that the ground surfaces exhibited a good finish: no major defects were detected at the macro- and microscale, and surface roughness parameters remained within standards. Furthermore, no hardness loss was observed at the surface or subsurface, and through microscopy and XRD analysis, the surface hardening seen in some samples was attributed to the work hardening mechanism.</p>