Superconductivity studies have been performed on someA‐15 pseudo‐binary systems to determine whether low‐temperature annealing, conducive to atomic ordering, will markedly raise the superconducting transition temperature. The following systems were examined for this behavior: Nb3Ge&sngbnd;Nb3Al, Nb3Sn&sngbnd;Nb3Al, and Nb3Ga&sngbnd;Nb3Al. Greater attention was devoted to the Nb&sngbnd;Al&sngbnd;Ge system in view of the recent observation of superconductivity above 20°K in this system. We have also observed transition temperatures approaching 20°K in nearly single phase samples of Nb&sngbnd;Al&sngbnd;Ge after low‐temperature heat treatment at 700° and 800°C. It is suggested that crystallographic long‐range ordering is responsible for the highTc's observed in this system. Attempts to confirm this hypothesis by determining the degree of long‐range order were unsuccessful. The otherA‐15 systems which we investigated also exhibited an increase ofTcwith low‐temperature heat treatment; however, none exceeded 18°K.