The effective permeability ( &mgr;eff) of the ring Sendust alloys (Fe‐9–10 wt. % Si‐5–7 wt. %Al), molded with Epoxy resin, was measured in the temperature range of −10 to 70 °C. The &mgr;effof the alloys in molded condition measured at 20 °C is smaller than that in unmolded condition. The high values of the &mgr;effat 20 °C of the molded alloys were obtained from the alloys in which magnetostriction constants (&lgr;s) were close to zero. The temperature dependencies of the &mgr;efffor the studied alloys in the unmolded condition are very similar, but after molding they are classified into four variations depending on the value of &lgr;s. When the alloys have large positive or negative values of &lgr;s, the &mgr;effincreases or decreases monotonically with increasing temperatures, but for the alloy with &lgr;s&bartil;0, the &mgr;efftemperature dependence is complex. These behaviors of the &mgr;effwith temperature are interpreted on the basis of the induced stress, initiating from the differences in thermal expansion between alloys and Epoxy resin. The &mgr;effof the molded alloys was mainly dominated by the induced uniaxial magnetic anisotropy (Ku) by the tangential and axial compressive stresses in the molded ring alloys.