Multiple Yield Strengths in Stress Test

Hi,

I am running a static simulation with multiple assembly's, one fuel tank (aluminium) and the brackets to hold it (steel) is there a way of getting two yield strengths on one simulation to show the yield strength of the brackets and also the tank at the same time? as for now i have to go into chart options and change the yield strength to match either steel or aluminium then changes the yield strength on everything in the simulation. 

Any help would be much appreciated!  

SolidworksSimulation