The present invention relates to creep-resistant magnesium-based alloys with low susceptibility to hot tearing, and with improved ductility, impact strength and fracture toughness, and corrosion resistance. The alloys contain at least 96 wt% magnesium, 1.5 to 1.9 wt% neodymium, 0.10 to 0.30 wt% yttrium, 0.35 to 0.70 wt% zirconium, 0.05 to 0.35 wt% zinc, 0.01 to 0.10 wt% calcium, 0.01 to 0.15 wt% strontium, and 0.0000 to 0.0005 wt% beryllium, and they are suitable for low pressure and gravity castings. Articles, that are castings of the alloys, are suitable for applications at temperatures as high as 175-250°C.