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EQ21A Magnesium vs. 1085 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 1085 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 1085 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
68
Elongation at Break, % 2.4
4.5 to 39
Fatigue Strength, MPa 110
22 to 49
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
26
Shear Strength, MPa 150
48 to 79
Tensile Strength: Ultimate (UTS), MPa 250
73 to 140
Tensile Strength: Yield (Proof), MPa 190
17 to 120

Thermal Properties

Latent Heat of Fusion, J/g 340
400
Maximum Temperature: Mechanical, °C 160
170
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
61
Electrical Conductivity: Equal Weight (Specific), % IACS 120
200

Otherwise Unclassified Properties

Base Metal Price, % relative 80
9.5
Density, g/cm3 1.9
2.7
Embodied Carbon, kg CO2/kg material 27
8.3
Embodied Energy, MJ/kg 210
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
4.8 to 21
Resilience: Unit (Modulus of Resilience), kJ/m3 410
2.1 to 110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
50
Strength to Weight: Axial, points 37
7.5 to 14
Strength to Weight: Bending, points 47
14 to 22
Thermal Diffusivity, mm2/s 62
94
Thermal Shock Resistance, points 15
3.3 to 6.1

Alloy Composition

Aluminum (Al), % 0
99.85 to 100
Copper (Cu), % 0.050 to 0.1
0 to 0.030
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 0
0 to 0.12
Magnesium (Mg), % 93.9 to 96.8
0 to 0.020
Manganese (Mn), % 0
0 to 0.020
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0 to 0.020
Unspecified Rare Earths, % 1.5 to 3.0
0
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.030
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.010