Rapidly solidified Al-Zn-Mg (with total Zn+Mg content of 8-10 wt%) alloy powders have been produced by high-pressure water atomisation of the melt, providing cooling rates up to 10(6) K/s. The conditions selected for melt dispersion and powder drying limited reaction between the alloys and water and associated hydrogen formation. The alloys were doped by Sc, Zr and other TM metal additions. After hot degassing, the powder briquettes were consolidated by pulse pressing at a pressure 1.0 GPa without cooling and under vacuum. The prepared preforms were hot extruded to produce rods, which were heat-treated. For the Al-Zn-Mg alloy system, hardening is associated with precipitation of the MgZn2 and Al3Sc1-xZrx phases. In all cases, additions of 0.2 - 0.3 wt% Sc increase the recrystallization temperature to a value greater than employed for quenching (733 to 743 K).