The　current　AISC　specification　(AISC　360-22)　does　not　permit　using　high-strength　materials　in　steel　plate-concrete　composite　(SC)　walls　due　to　limited　research.　This　paper　uses　three　steps　to　address　this.　In　the　first　step,　experimental　tests　on　13　high-strength　SC　walls　are　conducted.　The　test　parameters　are　stud　spacing,　thickness　of　steel　plate,　yield　stress　of　steel,　and　compressive　strength　of　concrete.　Results　from　the　tests　indicate　that　the　axial　compressive　strength　of　SC　walls　increases　when　the　material　strength　increases　or　when　the　slenderness　ratio　(i.e.,　ratio　of　the　stud　spacing　to　the　thickness　of　steel　faceplate)　decreases.　In　the　second　step,　finite　element　(FE)　models　are　developed　and　benchmarked.　Parametric　studies　are　then　conducted　to　further　validate　the　findings　from　the　tests　and　to　develop　effective　stress-strain　relationships　for　the　steel　faceplate.　The　resulting　effective　stress-strain　relationship　can　be　used　in　fiber-based　analysis　programs　for　better　accuracy,　since　it　implicitly　accounts　for　the　influence　of　local　buckling　and　yielding.　Finally,　the　effective　stress-strain　relationship　is　used　to　revise　the　equation　in　AISC　360-22.　The　accuracy　of　the　revised　equation　is　verified　using　results　from　both　the　experimental　tests　and　FE　parametric　studies.