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AM50A Magnesium vs. 2618 Aluminum

AM50A magnesium belongs to the magnesium alloys classification, while 2618 aluminum belongs to the aluminum alloys.

For each property being compared, the top bar is AM50A magnesium and the bottom bar is 2618 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 58
120
Elastic (Young's, Tensile) Modulus, GPa 45
71
Elongation at Break, % 11
5.8
Fatigue Strength, MPa 70
110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
27
Shear Strength, MPa 120
260
Tensile Strength: Ultimate (UTS), MPa 210
420
Tensile Strength: Yield (Proof), MPa 120
350

Thermal Properties

Latent Heat of Fusion, J/g 350
390
Maximum Temperature: Mechanical, °C 120
210
Melting Completion (Liquidus), °C 620
640
Melting Onset (Solidus), °C 570
550
Specific Heat Capacity, J/kg-K 1000
880
Thermal Conductivity, W/m-K 65
160
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
37
Electrical Conductivity: Equal Weight (Specific), % IACS 88
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.7
2.9
Embodied Carbon, kg CO2/kg material 23
8.3
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
23
Resilience: Unit (Modulus of Resilience), kJ/m3 150
850
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 71
47
Strength to Weight: Axial, points 35
40
Strength to Weight: Bending, points 47
42
Thermal Diffusivity, mm2/s 39
62
Thermal Shock Resistance, points 13
19

Alloy Composition


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Aluminum (Al), % 4.4 to 5.4
92.4 to 94.9
Copper (Cu), % 0 to 0.010
1.9 to 2.7
Iron (Fe), % 0 to 0.0040
0.9 to 1.3
Magnesium (Mg), % 93.7 to 95.3
1.3 to 1.8
Manganese (Mn), % 0.26 to 0.6
0
Nickel (Ni), % 0 to 0.0020
0.9 to 1.2
Silicon (Si), % 0 to 0.1
0.1 to 0.25
Titanium (Ti), % 0
0.040 to 0.1
Zinc (Zn), % 0 to 0.22
0 to 0.1
Residuals, % 0
0 to 0.15