The Cr-Fe (Chromium-Iron) System

51.996 amu Chromium and bcc iron dissolve in all proportions from Cr to Fe. The ~ and 8 allotropes of Fe unite at over 12 wt.% Cr to form a continuous bcc solid solution, ~SFe, stable at all temperatures up to the solidus. Consequently, the range of the fcc ~-phase is restricted. The element Cr is a stabilizer for a~Fe but not ~Fe.