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3005 Aluminum vs. EN-MC21320 Magnesium

3005 aluminum belongs to the aluminum alloys classification, while EN-MC21320 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 3005 aluminum and the bottom bar is EN-MC21320 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 33 to 73
68
Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 1.1 to 16
7.5
Fatigue Strength, MPa 53 to 100
95
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 84 to 150
130
Tensile Strength: Ultimate (UTS), MPa 140 to 270
230
Tensile Strength: Yield (Proof), MPa 51 to 240
140

Thermal Properties

Latent Heat of Fusion, J/g 400
370
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 660
600
Melting Onset (Solidus), °C 640
530
Specific Heat Capacity, J/kg-K 900
1000
Thermal Conductivity, W/m-K 160
66
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
17
Electrical Conductivity: Equal Weight (Specific), % IACS 140
91

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.8
1.6
Embodied Carbon, kg CO2/kg material 8.2
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.2 to 18
15
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 390
200
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 49
72
Strength to Weight: Axial, points 14 to 27
38
Strength to Weight: Bending, points 21 to 33
50
Thermal Diffusivity, mm2/s 64
40
Thermal Shock Resistance, points 6.0 to 12
13

Alloy Composition


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Aluminum (Al), % 95.7 to 98.8
3.5 to 5.0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.3
0 to 0.010
Iron (Fe), % 0 to 0.7
0 to 0.0050
Magnesium (Mg), % 0.2 to 0.6
92.5 to 95.9
Manganese (Mn), % 1.0 to 1.5
0.1 to 0.7
Nickel (Ni), % 0
0 to 0.0020
Silicon (Si), % 0 to 0.6
0.5 to 1.5
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0 to 0.2
Residuals, % 0 to 0.15
0 to 0.010