Fig. 6: Pseudo-binary phase diagram between CrNi2 and CoCrNi endpoints, charting the dissolution temperature of the ordered M2Cr phase as a function of Co content, where M is Co or Ni.
From: Comprehensive analysis of ordering in CoCrNi and CrNi2 alloys

The diagram, calculated to match experimental evidence, indicates a dissolution temperature for the equiatomic alloy that is below 673 K.