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AZ91A Magnesium vs. 7003 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while 7003 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 7003 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
70
Elongation at Break, % 5.0
11
Fatigue Strength, MPa 99
130 to 150
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
26
Shear Strength, MPa 140
210 to 230
Tensile Strength: Ultimate (UTS), MPa 240
350 to 390
Tensile Strength: Yield (Proof), MPa 160
300 to 310

Thermal Properties

Latent Heat of Fusion, J/g 360
380
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
630
Melting Onset (Solidus), °C 470
510
Specific Heat Capacity, J/kg-K 990
870
Thermal Conductivity, W/m-K 73
150
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
36
Electrical Conductivity: Equal Weight (Specific), % IACS 52
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.9
Embodied Carbon, kg CO2/kg material 22
8.1
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
37 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 280
630 to 710
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
47
Strength to Weight: Axial, points 38
33 to 37
Strength to Weight: Bending, points 49
37 to 40
Thermal Diffusivity, mm2/s 42
59
Thermal Shock Resistance, points 14
15 to 17

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
90.6 to 94.5
Chromium (Cr), % 0
0 to 0.2
Copper (Cu), % 0 to 0.1
0 to 0.2
Iron (Fe), % 0
0 to 0.35
Magnesium (Mg), % 88.2 to 91.2
0.5 to 1.0
Manganese (Mn), % 0.13 to 0.5
0 to 0.3
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.3
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0.35 to 1.0
5.0 to 6.5
Zirconium (Zr), % 0
0.050 to 0.25
Residuals, % 0
0 to 0.15