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EQ21A Magnesium vs. 3102 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 3102 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 3102 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
69
Elongation at Break, % 2.4
23 to 28
Fatigue Strength, MPa 110
31 to 34
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
26
Shear Strength, MPa 150
58 to 65
Tensile Strength: Ultimate (UTS), MPa 250
92 to 100
Tensile Strength: Yield (Proof), MPa 190
28 to 34

Thermal Properties

Latent Heat of Fusion, J/g 340
400
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 560
640
Specific Heat Capacity, J/kg-K 980
900
Thermal Conductivity, W/m-K 110
230
Thermal Expansion, µm/m-K 27
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
56
Electrical Conductivity: Equal Weight (Specific), % IACS 120
190

Otherwise Unclassified Properties

Base Metal Price, % relative 80
9.0
Density, g/cm3 1.9
2.7
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
16 to 22
Resilience: Unit (Modulus of Resilience), kJ/m3 410
5.8 to 8.3
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
50
Strength to Weight: Axial, points 37
9.4 to 10
Strength to Weight: Bending, points 47
17 to 18
Thermal Diffusivity, mm2/s 62
92
Thermal Shock Resistance, points 15
4.1 to 4.4

Alloy Composition


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Aluminum (Al), % 0
97.9 to 99.95
Copper (Cu), % 0.050 to 0.1
0 to 0.1
Iron (Fe), % 0
0 to 0.7
Magnesium (Mg), % 93.9 to 96.8
0
Manganese (Mn), % 0
0.050 to 0.4
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 0.1
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.3
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.15