Material Properties Magnesium Alloy AZ91E T4 Temper admin May 20, 2016 Material Properties for Magnesium Alloy AZ91E T4 Temper Physical specifications of materials. Materials Magnesium Alloy AZ91E Description T4 Temper Density g/cc 1.81 lb/in^3 0.0654 Hardness Brinell unless specified 55 Tensile Strength ultimate Mpa 275 Ksi 39.875 Yield Strength MPa 90 Ksi 13.05 Modulus of Elasticity Gpa 45 10^6 Psi 6.52173912 Poisson’s Ratio 0.35 %Elongation at break 15 %Reduction of area Izod Impact J Ft-lb Fracture Toughness Mpa(m)^0.5 Ksi(in)^0.5 Thermal conductivity W/m-K 72.7 Btu/ft-h-F 42.0231213814 Specific Heat Cpacity J/g-K 1.047 Btu/lb-F 0.25128 Coefficient of thermal expansion 1E-6/K 26 1E-6/F 14.466165402 Electrical Resistivity Ohm-cm 0.000017