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7075 Aluminum vs. ISO-WD32250 Magnesium

7075 aluminum belongs to the aluminum alloys classification, while ISO-WD32250 magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7075 aluminum and the bottom bar is ISO-WD32250 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 1.8 to 12
4.5 to 8.6
Fatigue Strength, MPa 110 to 190
170 to 210
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 150 to 340
180 to 190
Tensile Strength: Ultimate (UTS), MPa 240 to 590
310 to 330
Tensile Strength: Yield (Proof), MPa 120 to 510
240 to 290

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 200
120
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 480
550
Specific Heat Capacity, J/kg-K 870
980
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
25
Electrical Conductivity: Equal Weight (Specific), % IACS 98
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.0
1.8
Embodied Carbon, kg CO2/kg material 8.3
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1120
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
14 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
630 to 930
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
67
Strength to Weight: Axial, points 22 to 54
49 to 51
Strength to Weight: Bending, points 28 to 52
58 to 60
Thermal Diffusivity, mm2/s 50
72
Thermal Shock Resistance, points 10 to 25
19 to 20

Alloy Composition

Aluminum (Al), % 86.9 to 91.4
0
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.1 to 2.9
94.9 to 97.1
Manganese (Mn), % 0 to 0.3
0
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.1 to 6.1
2.5 to 4.0
Zirconium (Zr), % 0 to 0.25
0.45 to 0.8
Residuals, % 0
0 to 0.3