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5021 Aluminum vs. ISO-WD32260 Magnesium

5021 aluminum belongs to the aluminum alloys classification, while ISO-WD32260 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 5021 aluminum and the bottom bar is ISO-WD32260 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
46
Elongation at Break, % 1.1 to 3.4
4.5 to 6.0
Fatigue Strength, MPa 85 to 110
150 to 190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 170
190 to 200
Tensile Strength: Ultimate (UTS), MPa 300 to 310
330 to 340
Tensile Strength: Yield (Proof), MPa 240 to 270
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 400
330
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 590
520
Specific Heat Capacity, J/kg-K 900
970
Thermal Conductivity, W/m-K 140
110
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
28
Electrical Conductivity: Equal Weight (Specific), % IACS 120
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
1.9
Embodied Carbon, kg CO2/kg material 8.6
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1 to 10
14 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 550
560 to 700
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
63
Strength to Weight: Axial, points 30 to 32
48 to 51
Strength to Weight: Bending, points 37
56 to 58
Thermal Diffusivity, mm2/s 57
63
Thermal Shock Resistance, points 13 to 14
19 to 20

Alloy Composition

Aluminum (Al), % 95.2 to 97.7
0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.2 to 2.8
92.7 to 94.8
Manganese (Mn), % 0.1 to 0.5
0
Silicon (Si), % 0 to 0.4
0
Zinc (Zn), % 0 to 0.15
4.8 to 6.2
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3