Figure 4
From: Composition equivalents of stainless steels understood via gamma stabilizing efficiency

(a) Fe-rich side of Fe-Co binary phase diagram, showing the lower boundary of γ phase zone (blue line). (b) Fe-C-Co ternary phase diagram at a series of Fe:Co = 29:1, 9:1, 7:3, 1:1, 3:7, 3:9 (wt%), showing the gradual change of γ phase zone29.