The　deformation　of　Galfan-coated　steel　strands　at　elevated　temperatures　causes　prestress　loss　and　structural　stiffness　reduction,　which　leads　to　a　reduction　in　the　overall　bearing　capacity　and　the　collapse　of　the　structure.　Hence,　it　is　necessary　to　investigate　the　deformation　of　Galfan-coated　steel　strands　at　elevated　temperatures.　In　this　study,　elevated　temperature　tests　were　performed　on　24　Galfan-coated　steel　strands,　and　the　deformation　behavior　of　Galfan-coated　steel　strands　of　different　diameters　under　eight　different　stress–temperature　conditions　were　analyzed.　The　temperature　deformation　curves　of　the　strands　were　plotted　for　temperatures　ranging　from　30　to　500　°C.　In　addition,　an　equation　that　expresses　the　relationship　between　deformation,　temperature,　and　initial　stress　in　the　thermal–mechanical　coupling　state　in　the　heating　stage　was　derived.　The　parameters　in　the　equation　were　fitted,　and　a　uniform　expression　of　the　parameters　was　derived.　Furthermore,　the　equation　showing　the　relationship　between　the　parameters　for　the　creep　model　and　temperature　T　for　the　constant-temperature　stage　was　established　©　2021　Elsevier　Ltd