Recent results on the SCC behaviour of ductile fcc materials are reviewed. Critical experiments are presented to test the corrosion enhanced plasticity model proposed some years ago by one of the present authors to describe the SCC of austenitic stainless steels in C1-solutions. Slow strain rate tests on (110) and { 100) 316L alloy single crystals clearly confirm that the macroscopically brittle fracture is in fact achieved by microcracking on { 111 } microfacets in zig-zag. Moreover the corrosion deformation interactions on which the model is based are quantitatively analysed through softening effects observed in cyclic plastic deformation in the corrosive solution. The conditions for hydrogen entry in the material are described, which leads to the notion of critical surface defects for hydrogen effects. New developments of the model are then discussed and a numerical simulation of the corrosion deformation interactions is presented.