In　order　to　investigate　flexural　buckling　of　stainless　steel　welded　box-section　beam-columns,　5　austenitic　and　5　duplex　stainless　steel　welded　box-section　columns　are　loaded　eccentrically,　with　values　of　slenderness　varying　from　55　to　85.　The　design　loading　eccentricities　are　50　mm,　60　mm　and　70　mm,　and　the　initial　bending　and　loading　eccentricities　are　measured　before　the　test.　The　static　loading　capacity　of　the　components　is　analyzed　based　on　the　test　results,　which　are　compared　with　the　predictions　based　on　current　specifications　CECS　410:2015　and　EN　1993-1-4.　The　results　indicate　that　all　members　failed　in　the　form　of　overall　flexural　buckling　without　obvious　local　buckling.　The　bearing　capacity　decreases　with　increase　of　slenderness　and　loading　eccentricities.　For　the　duplex　stainless　steel　welded　beam-columns,　both　EN　1993-1-4　and　CECS　410:2015　provide　conservative　prediction　on　the　loading　capacity.　Moreover,　as　for　the　austenitic　stainless　steel　welded　beam-columns,　EN　1993-1-4　also　provides　conservative　prediction　on　the　loading　capacity.　Although　the　test　results　of　individual　specimens　are　slightly　lower　than　the　calculation　results　of　CECS　410:2015,　most　prove　to　be　safe　generally.　©　2018,　Engineering　Mechanics　Press.　All　right　reserved.