Patent ID: 7169240

Claim:
A magnesium based alloy, for high pressure die casting with good castability, having a minimum creep rate (MCR) at 150° C. of from 1.1 to 3.2×10 −9 /s under the stress of 50 MPa in combination with a tensile yield strength (TYS) of from 145 to 182 MPa at ambient temperature, and an ultimate tensile strength (UTS) of from 244 to 275 MPa at ambient temperature containing: a) at least 86 wt % Mg, b) 6.1 to 9.2 wt % aluminum, c) 0.08 to 0.38 wt % manganese, d) 0.00 to 0.9 wt % zinc, e) 0.2 to 1.2 wt % calcium, f) 0.2 to 1.4 wt % strontium, g) 0.00 to 0.8 wt % rare earth elements, h) 0.00 to 0.02 wt % zirconium, and i) up to 0.004 wt % iron, up to 0.001 wt % nickel, up to 0.003 wt % copper, and/or up to 0.03 wt % silicon wherein the total amount of calcium and strontium >0.9 wt % and wherein the alloy is beryllium-free.