Flexural　buckling　behavior　of　stainless　steel　columns　has　been　widely　investigated　and　discussed.　However,　a　barely　explored　area　is　that　of　welded-section　members.　In　this　paper,　twelve　full-scale　columns　buckling　tests　have　been　conducted　for　both　austenitic　and　duplex　welded　stainless　steel　box　section　members.　Specimen　cross-sections　and　lengths　have　been　selected　to　cover　a　wide　range　of　geometries,　varying　between　non-dimensional　slenderness　of　0.5　and　2.0.　Measurements　of　material　properties,　residual　stress　and　initial　geometric　imperfection　have　been　also　conducted.　Relevant　numerical　simulation　has　been　performed,　accuracy　of　which　is　verified　by　comparing　with　the　test　results.　The　test　results　have　been　used　to　assess　the　applicability　of　the　EN　1993-1-4,　ASCE　8-02　and　AS/NZS　for　stainless　steel　welded-sections.　It　shows　that　current　design　method　predicts　the　buckling　resistance　of　welded　stainless　steel　box-section　generally　conservative　thus　improvement　could　be　anticipated.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.