The　mechanical　behaviour　of　aluminium　1A30-stainless　steel　1Cr18Ni9Ti　bi-metals,　made　by　the　explosive　welding　method,　is　investigated　under　uniaxial　tension　conditions.　The　mechanical　parameters　of　the　bi-metal　calculated　using　the　mixture　rule　theory　under　uniaxial　tension　conditions　are　compared　with　measured　parameters.　It　is　found　that　the　mixture　rule　theory　is　suitable　for　the　calculation　of　the　mechanical　parameters　except　for　ultimate　tensile　strength.　Experimental　data　show　that　yield　stress　and　ultimate　tensile　strength　have　an　exponential　relationship　with　the　relative　thickness　ratio　of　stainless　steel,　respectively.　A　mathematical　model　is　introduced　to　describe　the　relationships　of　yield　stress　and　ultimate　tensile　strength　to　the　relative　thickness　ratio　of　stainless　steel.　It　is　also　found　that　elastic　modulus,　hardening　coefficient,　and　hardening　exponent　basically　have　a　linear　relationship　with　the　absolute　thickness　ratio　of　stainless　steel,　respectively.　All　the　relationships　show　a　monotonically　increasing　tendency.　Fracture　behaviour　under　uniaxial　tensile　conditions　mainly　take　the　form　of　fracture　on　the　stainless　steel　side　of　the　bi-metal　and　detachment　in　the　interface.