This　paper　investigates　the　axial　compressive　behavior　of　concrete-filled　stainless-carbon　steel　tube　(CFSCT)　stub　columns,　consisting　of　an　outer　stainless　steel　tube,　an　inner　carbon　steel　tube,　and　infilled　concrete.　A　total　of　twenty　column　specimens　are　fabricated　and　tested.　Test　parameters　include　column　section　type,　strength　and　wall　thickness　of　carbon　steel　tube,　and　concrete　strength.　Failure　modes,　load　versus　deformation　relationships,　ultimate　strength,　residual　strength,　ductility,　elastic　and　elastic-plastic　local　buckling　stress,　and　strain　characteristics　are　investigated.　Results　show　that　outward　local　buckling　of　stainless　steel　tubes　occurs　in　all　CFSCT　column　specimens,　and　columns　fail　in　a　ductile　manner.　Increasing　the　carbon　steel　tube　thickness　can　significantly　improve　column　ultimate　strength　and　residual　strength.　Compared　to　conventional　concrete-filled　stainless　steel　tube　(CFSST)　columns,　the　ultimate　strength　of　CFSCT　columns　improved　by　10.9%,　23.1%,　and　27.4%　on　average　for　columns　with　carbon　steel　tube　wall　thickness　of　2,　4,　and　6　mm,　respectively.　The　post-peak　ductility　behavior　is　also　related　to　carbon　steel　tube　wall　thickness,　increasing　wall　thickness　can　slow　down　the　descending　branch　after　peak　load.　Concrete　has　significant　effect　on　the　ultimate　strength,　when　concrete　strength　increases,　specimen　ultimate　strength　increases　by　15.1%　on　average.　In　addition,　finite　element　model　is　established　and　analyzed　based　on　the　experimental　results.　Finally,　ultimate　strengths　are　compared　and　evaluated　according　to　the　Eurocode　4,　AIJ,　ACI　and　GB　50936.　©　2021　Elsevier　Ltd