This　paper　presents　experimental　studies　on　the　mechanical　properties　and　low-cycle　fatigue　behaviour　of　corroded　austenitic　stainless　steel　(3　0　4)　and　ferritic　stainless　steel　(4　3　0).　Tensile　and　low-cycle　fatigue　tests　are　conducted　on　28　specimens.　The　corrosion　process　of　the　specimens　is　finished　by　using　salt　spray　and　dry/wet　cycle　tests.　In　the　tensile　tests,　the　key　parameters　of　the　constitutive　model　proposed　by　both　Rasmussen　and　Gardner　were　obtained　for　austenitic　stainless　steel　(3　0　4)　and　ferritic　stainless　steel　(4　3　0).　In　the　low-cycle　fatigue　test,　the　relationships　of　the　stress　amplitude　and　fatigue　life　of　the　specimens　were　obtained.　The　relationships　of　the　mass　loss,　corrosion　rate　and　cross-sectional　area　loss　with　the　corrosion　time　are　established.　The　influences　of　corrosion　pits　and　fatigue　cracks　on　the　low-cycle　fatigue　behaviour　of　these　two　materials　are　studied　through　both　macro　and　micro　fracture　morphology　analysis.　It　is　found　that　compared　with　the　salt　spray,　the　dry/wet　cycle　condition　causes　more　degradation　on　the　strength　and　fatigue　life　of　the　ferritic　stainless　steel　(4　3　0).　The　stress　concentration　and　notch　effect　of　corrosion　pits　are　the　main　reasons　for　the　degradation　in　fatigue　life　of　ferritic　stainless　steel　(4　3　0).　Moreover,　current　codes　Eurocode　3　(EC3),　Australian　Standard　(AS),　BSI　Standard　(BSI)　and　DNV　Standard　(DNV)　could　not　provide　accurate　fatigue　life　assessment　for　these　two　materials　after　salt　spray　and　dry/wet　cycle　corrosions.　©　2022　Elsevier　Ltd