The　current　study　is　presented　to　probe　the　impacts　of　thermal　radiation　and　mixed　convection　of　axisymmetric　Casson　fluid　flow　in　the　presence　of　magnetic　field　along　with　nano-particles.　The　flow　is　provoked　because　of　unsteady　radially　stretching　sheet.　The　solution　of　transformed　ordinary　differential　equations　is　attained　by　utilizing　Keller-box　finite　difference　method　(IFDM).　The　influence　of　different　parameters　on　flow　features　is　sketched　through　various　graphs　and　results　are　tabulated　and　argued　briefly.　The　convection　conditions　on　the　wall　temperature　and　concentration　are　also　exerted　in　the　study.　Finally,　a　comparison　is　established　with　existing　literature　to　support　our　results　and　a　good　agreement　is　found　which　corroborates　our　work.　A　decline　in　both　velocity　and　temperature　is　witnessed　with　the　rise　in　Casson　parameter.　It　is　also　observed　that　with　the　rise　Brownian　motion　and　Thermophoresis　parameters,　the　temperature　of　the　fluid　rises　but　concentration　profile　decreases　in　start　and　then　start　increasing.　The　fluid　concentration　in　its　boundary　layer　decreases　with　the　increase　of　heavier　species,　the　parameter　of　the　reaction　rate　and　the　exponent　of　power　law　for　fluid　having　Prandtl　number　=　10.0,　15.0,　and　20.0.　Moreover,　the　fluid　velocity　depreciates　with　the　rise　in　unsteadiness　parameter　while　a　significant　decrease　in　temperature　is　noted.　The　outcomes　of　study　are　quite　useful　in　fabrication　of　magnetic　nano-materials　and　high　temperature　treatment　of　magnetic　nano-polymers.　©　2019,　Springer　Nature　Switzerland　AG.