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AZ91D Magnesium vs. R60705 Alloy

AZ91D magnesium belongs to the magnesium alloys classification, while R60705 alloy belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ91D magnesium and the bottom bar is R60705 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
98
Elongation at Break, % 2.3 to 4.5
18
Fatigue Strength, MPa 74 to 85
290
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
37
Tensile Strength: Ultimate (UTS), MPa 160 to 220
540
Tensile Strength: Yield (Proof), MPa 80 to 130
430

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Specific Heat Capacity, J/kg-K 990
270
Thermal Conductivity, W/m-K 78
17
Thermal Expansion, µm/m-K 27
6.3

Otherwise Unclassified Properties

Density, g/cm3 1.7
6.7
Embodied Water, L/kg 990
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
90
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
950
Stiffness to Weight: Axial, points 15
8.1
Stiffness to Weight: Bending, points 69
23
Strength to Weight: Axial, points 26 to 34
22
Strength to Weight: Bending, points 38 to 46
22
Thermal Diffusivity, mm2/s 45
9.5
Thermal Shock Resistance, points 9.5 to 13
63

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
0 to 0.2
Copper (Cu), % 0 to 0.030
0
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 0 to 0.0050
0 to 0.2
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0
Nickel (Ni), % 0 to 0.0020
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0
0 to 0.025
Oxygen (O), % 0
0 to 0.18
Silicon (Si), % 0 to 0.1
0
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
91 to 98