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2018 Aluminum vs. EN-MC65120 Magnesium

2018 aluminum belongs to the aluminum alloys classification, while EN-MC65120 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 2018 aluminum and the bottom bar is EN-MC65120 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
55
Elastic (Young's, Tensile) Modulus, GPa 73
45
Elongation at Break, % 9.6
3.1
Fatigue Strength, MPa 120
80
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 270
92
Tensile Strength: Ultimate (UTS), MPa 420
160
Tensile Strength: Yield (Proof), MPa 310
110

Thermal Properties

Latent Heat of Fusion, J/g 390
330
Maximum Temperature: Mechanical, °C 220
180
Melting Completion (Liquidus), °C 640
590
Melting Onset (Solidus), °C 510
520
Specific Heat Capacity, J/kg-K 870
970
Thermal Conductivity, W/m-K 150
100
Thermal Expansion, µm/m-K 22
26

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 11
25
Density, g/cm3 3.1
1.9
Embodied Carbon, kg CO2/kg material 8.1
25
Embodied Energy, MJ/kg 150
190
Embodied Water, L/kg 1130
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
4.4
Resilience: Unit (Modulus of Resilience), kJ/m3 670
140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
62
Strength to Weight: Axial, points 38
23
Strength to Weight: Bending, points 41
34
Thermal Diffusivity, mm2/s 57
56
Thermal Shock Resistance, points 19
9.8

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0 to 0.030
Iron (Fe), % 0 to 1.0
0 to 0.010
Magnesium (Mg), % 0.45 to 0.9
91.8 to 95.1
Manganese (Mn), % 0 to 0.2
0 to 0.15
Nickel (Ni), % 1.7 to 2.3
0 to 0.0050
Silicon (Si), % 0 to 0.9
0 to 0.010
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0 to 0.25
2.0 to 3.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.010