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AZ91A Magnesium vs. 2219 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while 2219 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AZ91A magnesium and the bottom bar is 2219 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
72
Elongation at Break, % 5.0
2.2 to 20
Fatigue Strength, MPa 99
90 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Shear Strength, MPa 140
110 to 280
Tensile Strength: Ultimate (UTS), MPa 240
180 to 480
Tensile Strength: Yield (Proof), MPa 160
88 to 390

Thermal Properties

Latent Heat of Fusion, J/g 360
390
Maximum Temperature: Mechanical, °C 130
230
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 470
540
Specific Heat Capacity, J/kg-K 990
870
Thermal Conductivity, W/m-K 73
110 to 170
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
28 to 44
Electrical Conductivity: Equal Weight (Specific), % IACS 52
81 to 130

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.7
3.1
Embodied Carbon, kg CO2/kg material 22
8.2
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
9.6 to 60
Resilience: Unit (Modulus of Resilience), kJ/m3 280
54 to 1060
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
44
Strength to Weight: Axial, points 38
16 to 43
Strength to Weight: Bending, points 49
23 to 44
Thermal Diffusivity, mm2/s 42
42 to 63
Thermal Shock Resistance, points 14
8.2 to 22

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
91.5 to 93.8
Copper (Cu), % 0 to 0.1
5.8 to 6.8
Iron (Fe), % 0
0 to 0.3
Magnesium (Mg), % 88.2 to 91.2
0 to 0.020
Manganese (Mn), % 0.13 to 0.5
0.2 to 0.4
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.2
Titanium (Ti), % 0
0.020 to 0.1
Vanadium (V), % 0
0.050 to 0.15
Zinc (Zn), % 0.35 to 1.0
0 to 0.1
Zirconium (Zr), % 0
0.1 to 0.25
Residuals, % 0
0 to 0.15