Frenkel-defect resistivity (ρf) ratios for pairs of metallic elements are estimated from published resistivity damage-rate data, obtained during low-temperature neutron irradiations. These ratios are used in order to determine the range of mutually compatible ρf values for the elements: Al, α-Co, Cu, Mo, Nb, Ni, Pt, Ta, α-Zr, in which ρF had been experimentally measured, and to estimate ρF values for Ag, Au, Cd, α-Fe, Pd, βSn, V, W. Among the proposed empirical relationships, the best correlation is obtained between ρF and the resistivity at the melting point.