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AZ91A Magnesium vs. 2095 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while 2095 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AZ91A magnesium and the bottom bar is 2095 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
70
Elongation at Break, % 5.0
8.5
Fatigue Strength, MPa 99
200
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 140
410
Tensile Strength: Ultimate (UTS), MPa 240
700
Tensile Strength: Yield (Proof), MPa 160
610

Thermal Properties

Latent Heat of Fusion, J/g 360
390
Maximum Temperature: Mechanical, °C 130
210
Melting Completion (Liquidus), °C 600
660
Melting Onset (Solidus), °C 470
540
Specific Heat Capacity, J/kg-K 990
910
Thermal Conductivity, W/m-K 73
130
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
35
Electrical Conductivity: Equal Weight (Specific), % IACS 52
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
3.0
Embodied Carbon, kg CO2/kg material 22
8.6
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 990
1470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
57
Resilience: Unit (Modulus of Resilience), kJ/m3 280
2640
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
46
Strength to Weight: Axial, points 38
65
Strength to Weight: Bending, points 49
59
Thermal Diffusivity, mm2/s 42
49
Thermal Shock Resistance, points 14
31

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
91.3 to 94.9
Copper (Cu), % 0 to 0.1
3.9 to 4.6
Iron (Fe), % 0
0 to 0.15
Lithium (Li), % 0
0.7 to 1.5
Magnesium (Mg), % 88.2 to 91.2
0.25 to 0.8
Manganese (Mn), % 0.13 to 0.5
0 to 0.25
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.12
Silver (Ag), % 0
0.25 to 0.6
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0.35 to 1.0
0 to 0.25
Zirconium (Zr), % 0
0.040 to 0.18
Residuals, % 0
0 to 0.15