The effect of grain size on the suceptibility towards strain age cracking (SAC) has been investigated for Haynes^® 282^® in the tempeature range of 750 to 950^∘C after isothermal exposure up to 1800s. Grain growth was induced by heat treating the material at 1150^∘C for 2h, resulting in a fourfold increase in grain size. Hardness was significanlty reduced after heat treatment as compared to mill-annealed material. Large grain size resulted in intergranular fracture over a wider temperature range than small grain size material. Ductility was lowest at 850^∘C, while lower values were observed to be correlated to increased grain size. The rapid formation of grain boundary carbide networks in Haynes^® 282^® is found to be not able to compensate for higher local stresses on grain boundaries due to incresed grain size.