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7049A Aluminum vs. EQ21A Magnesium

7049A aluminum belongs to the aluminum alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is 7049A aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
44
Elongation at Break, % 5.0 to 5.7
2.4
Fatigue Strength, MPa 180
110
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 340 to 350
150
Tensile Strength: Ultimate (UTS), MPa 580 to 590
250
Tensile Strength: Yield (Proof), MPa 500 to 530
190

Thermal Properties

Latent Heat of Fusion, J/g 370
340
Maximum Temperature: Mechanical, °C 200
160
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 430
560
Specific Heat Capacity, J/kg-K 850
980
Thermal Conductivity, W/m-K 130
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
25
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Base Metal Price, % relative 10
80
Density, g/cm3 3.1
1.9
Embodied Carbon, kg CO2/kg material 8.2
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28 to 32
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 1800 to 1990
410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 44
63
Strength to Weight: Axial, points 52 to 53
37
Strength to Weight: Bending, points 50 to 51
47
Thermal Diffusivity, mm2/s 50
62
Thermal Shock Resistance, points 25
15

Alloy Composition

Aluminum (Al), % 84.6 to 89.5
0
Chromium (Cr), % 0.050 to 0.25
0
Copper (Cu), % 1.2 to 1.9
0.050 to 0.1
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.1 to 3.1
93.9 to 96.8
Manganese (Mn), % 0 to 0.5
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0
Silver (Ag), % 0
1.3 to 1.7
Titanium (Ti), % 0 to 0.25
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Zinc (Zn), % 7.2 to 8.4
0
Zirconium (Zr), % 0 to 0.25
0.4 to 1.0
Residuals, % 0
0 to 0.3