This　paper　presents　experimental　studies　on　the　mechanical　properties　and　low-cycle　fatigue　behaviour　of　corroded　austenitic　stainless　steel　(304)　and　ferritic　stainless　steel　(430).　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　(304)　and　ferritic　stainless　steel　(430).　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　(430).　The　stress　concentration　and　notch　effect　of　corrosion　pits　are　the　main　reasons　for　the　degradation　in　fatigue　life　of　ferritic　stainless　steel　(430).　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.