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EQ21A Magnesium vs. 7049A Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 7049A aluminum belongs to the aluminum 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 EQ21A magnesium and the bottom bar is 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition


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Aluminum (Al), % 0
84.6 to 89.5
Chromium (Cr), % 0
0.050 to 0.25
Copper (Cu), % 0.050 to 0.1
1.2 to 1.9
Iron (Fe), % 0
0 to 0.5
Magnesium (Mg), % 93.9 to 96.8
2.1 to 3.1
Manganese (Mn), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.4
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0 to 0.25
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
7.2 to 8.4
Zirconium (Zr), % 0.4 to 1.0
0 to 0.25
Residuals, % 0 to 0.3
0 to 0.15