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6008 Aluminum vs. AS41B Magnesium

6008 aluminum belongs to the aluminum alloys classification, while AS41B magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 6008 aluminum and the bottom bar is AS41B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 9.1 to 17
6.0
Fatigue Strength, MPa 55 to 88
97
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 120 to 170
120
Tensile Strength: Ultimate (UTS), MPa 200 to 290
210
Tensile Strength: Yield (Proof), MPa 100 to 220
140

Thermal Properties

Latent Heat of Fusion, J/g 410
370
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 640
620
Melting Onset (Solidus), °C 620
570
Specific Heat Capacity, J/kg-K 900
1000
Thermal Conductivity, W/m-K 190
68
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 49
17
Electrical Conductivity: Equal Weight (Specific), % IACS 160
92

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.5
23
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 1180
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 28
11
Resilience: Unit (Modulus of Resilience), kJ/m3 76 to 360
220
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
72
Strength to Weight: Axial, points 21 to 29
35
Strength to Weight: Bending, points 28 to 35
47
Thermal Diffusivity, mm2/s 77
41
Thermal Shock Resistance, points 9.0 to 13
13

Alloy Composition


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Aluminum (Al), % 96.5 to 99.1
3.5 to 5.0
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.3
0 to 0.020
Iron (Fe), % 0 to 0.35
0 to 0.0035
Magnesium (Mg), % 0.4 to 0.7
92.7 to 95.7
Manganese (Mn), % 0 to 0.3
0.35 to 0.7
Nickel (Ni), % 0
0 to 0.0020
Silicon (Si), % 0.5 to 0.9
0.5 to 1.5
Titanium (Ti), % 0 to 0.1
0
Vanadium (V), % 0.050 to 0.2
0
Zinc (Zn), % 0 to 0.2
0 to 0.12
Residuals, % 0 to 0.15
0