Patent ID: 7547411

Claim:
A magnesium based alloy for die casting, creep-resistant and not prone to die sticking, comprising: i) at least 87 wt % magnesium (Mg); ii) 6.1 to 7.4 wt % aluminum (Al); iii) 1.7 to 3.5 wt % strontium (Sr); iv) 0.35 to 0.85 wt % rare earth elements (RE); v) 0.18 to 0.35 wt % manganese (Mn); vi) 0.0003 to 0.0015 wt % beryllium (Be); vii) 0.0 to 0.5 wt % silicon (Si); viii) 0.0 to 0.4 wt % calcium (Ca); and ix) 0.0 to 0.15 wt % zinc (Zn); wherein the alloy has a minimum creep rate (MCR) at 150° C. and under the stress of 70 MPa of about 0.5×10 −9 /s or less, in combination with tensile yield strength (TYS) at 150° C. of about 115 MPa or more and at ambient temperature of about 145 MPa or more.