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2618A Aluminum vs. EN-MC21120 Magnesium

2618A aluminum belongs to the aluminum alloys classification, while EN-MC21120 magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 2618A aluminum and the bottom bar is EN-MC21120 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
46
Elongation at Break, % 4.5
2.2 to 6.7
Fatigue Strength, MPa 120
84 to 96
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
18
Shear Strength, MPa 260
110 to 160
Tensile Strength: Ultimate (UTS), MPa 440
200 to 270
Tensile Strength: Yield (Proof), MPa 410
130 to 170

Thermal Properties

Latent Heat of Fusion, J/g 390
350
Maximum Temperature: Mechanical, °C 230
130
Melting Completion (Liquidus), °C 670
600
Melting Onset (Solidus), °C 560
490
Specific Heat Capacity, J/kg-K 880
990
Thermal Conductivity, W/m-K 150
76
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
11
Electrical Conductivity: Equal Weight (Specific), % IACS 110
59

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 3.0
1.7
Embodied Carbon, kg CO2/kg material 8.4
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1150
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
5.0 to 15
Resilience: Unit (Modulus of Resilience), kJ/m3 1180
180 to 320
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
69
Strength to Weight: Axial, points 41
31 to 43
Strength to Weight: Bending, points 44
43 to 53
Thermal Diffusivity, mm2/s 59
44
Thermal Shock Resistance, points 19
11 to 16

Alloy Composition

Aluminum (Al), % 91.5 to 95.2
8.3 to 9.7
Copper (Cu), % 1.8 to 2.7
0 to 0.030
Iron (Fe), % 0.9 to 1.4
0 to 0.0050
Magnesium (Mg), % 1.2 to 1.8
88.6 to 91.3
Manganese (Mn), % 0 to 0.25
0.1 to 0.5
Nickel (Ni), % 0.8 to 1.4
0 to 0.0020
Silicon (Si), % 0.15 to 0.25
0 to 0.2
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.15
0.35 to 1.0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0
0 to 0.010