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EQ21A Magnesium vs. 2618 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 2618 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EQ21A magnesium and the bottom bar is 2618 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
120
Elastic (Young's, Tensile) Modulus, GPa 44
71
Elongation at Break, % 2.4
5.8
Fatigue Strength, MPa 110
110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
27
Shear Strength, MPa 150
260
Tensile Strength: Ultimate (UTS), MPa 250
420
Tensile Strength: Yield (Proof), MPa 190
350

Thermal Properties

Latent Heat of Fusion, J/g 340
390
Maximum Temperature: Mechanical, °C 160
210
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 560
550
Specific Heat Capacity, J/kg-K 980
880
Thermal Conductivity, W/m-K 110
160
Thermal Expansion, µm/m-K 27
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
37
Electrical Conductivity: Equal Weight (Specific), % IACS 120
110

Otherwise Unclassified Properties

Base Metal Price, % relative 80
11
Density, g/cm3 1.9
2.9
Embodied Carbon, kg CO2/kg material 27
8.3
Embodied Energy, MJ/kg 210
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
23
Resilience: Unit (Modulus of Resilience), kJ/m3 410
850
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 63
47
Strength to Weight: Axial, points 37
40
Strength to Weight: Bending, points 47
42
Thermal Diffusivity, mm2/s 62
62
Thermal Shock Resistance, points 15
19

Alloy Composition

Aluminum (Al), % 0
92.4 to 94.9
Copper (Cu), % 0.050 to 0.1
1.9 to 2.7
Iron (Fe), % 0
0.9 to 1.3
Magnesium (Mg), % 93.9 to 96.8
1.3 to 1.8
Nickel (Ni), % 0 to 0.010
0.9 to 1.2
Silicon (Si), % 0
0.1 to 0.25
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0.040 to 0.1
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.1
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.15