Upper panels: ratio of iron mass of the plateau (left) and the peak (right) to the gas mass within r₅₀₀ versus cluster redshift. The black curves show the best-fit functions and . Lower panels: correlation between the iron mass of the two components and the surface brightness concentration c_SB. The black curves show the best-fit functions and . Shaded area indicates the 1σ confidence interval of the best-fit model. For the iron peak, the best-fits are obtained by fitting the weighted average values and uncertainties of the four bins shown as orange solid lines and shaded areas.