To　investigate　the　relationship　between　service　temperature　ranging　from　-40　similar　to　250(degrees)C,　and　size　effect　on　tensile　properties　of　thin　ASS-304　sheets　with　nine　different　thicknesses　(40　similar　to　500　mu　m),　uniaxial　tensile　tests　were　performed　on　thin　ASS-304　sheets　of　the　same　average　grain　size　in　the　present　study.　Within　the　thickness　range　of　40　to　300　mu　m,　corresponding　to　eta　=　t/d　values　from　1.1　to　8.1.　The　ultimate　tensile　strength　(UTS),　yield　strength　(YS),　and　elongation　(EL)　of　ASS-304　exhibits　a　dimensional　effect　of　＂the　thinner,　the　stronger＂.　For　example,　as　the　eta　increases　from　1.1　to　8.1,　the　UTS　rapidly　decreased　from　1798.8　to　839.0　MPa　at　20(degrees)C,　from　1703.1　to　526.9　MPa　at　150(degrees)C,　and　from　1661.2　to　478.9　MPa　at　250celcius,　attenuation　of　53.36,　69.06,　and　71.17%,　respectively.　Meanwhile,　the　YS　at　20(degrees)C　are　separately　1768.9　to　418.7　MPa　with　1695.2　to　343.3　MPa　at　150(degrees)C　as　well　as　1645.7　to　330.1　MPa　at　250(degrees)C,　decrease　the　proportion　of　76.33%,　79.75%　and　79.94%　respectively.　Notably,　the　UTS,　YS,　and　EL　at　150　and　250(degrees)C　are　lower　than　those　at　20(degrees)C.　The　true　stress　value　of　ASS-304　was　enhanced　at　-20　and　-40(degrees)C,　and　the　true　strain　increases　first　and　then　weakens　as　the　thickness　increases,　the　reason　is　the　transformation-　induced-plasticity　(TRIP)　effect　of　ASS-304　in　stretching.　The　asymptotic　function　describes　the　relationship　between　strength　and　the　values　of　eta,　while　the　Chapman　function　represents　the　relationship　between　elongation　and　the　eta.　A　linear　variation　exists　between　service　temperature　and　tensile　properties.　And　relevant　empirical　equations　including　T-eta-　and　T-eta-tensile　properties　were　established,　which　can　predict　the　UTS,　YS,　and　EL　of　thin　ASS-304　sheets　under　different　service　temperatures.