With regard to the limited number of magnesium alloys in use, an approach has been undertaken to develop a new class of magnesium alloys based on the system Mg-Sn-Ca. From recent investigations the alloy Mg3Sn2Ca has been identified as one of the most promising magnesium alloys. It will be shown that this alloy offers superior creep properties even compared to the creep resistant alloy AE42. Mechanical properties will be presented as well as results from compressive creep experiments at 80 MPa and temperatures of 135-175°C. Additionally, the Mg3Sn2Ca alloy also offers good hot deformation behavior in the temperature range of 300-550°C and deformation rates of 10-3.5-10-1 s-1, as revealed by the processing maps generated for the alloy. Compared with the most widely used alloy AZ31 the Mg3Sn2Ca can be easily hot worked over the entire temperature range investigated at fairly high strain rates, and the alloy recrystallized completely.