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ISO-WD32250 Magnesium vs. 7075 Aluminum

ISO-WD32250 magnesium belongs to the magnesium alloys classification, while 7075 aluminum belongs to the aluminum 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 ISO-WD32250 magnesium and the bottom bar is 7075 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

Aluminum (Al), % 0
86.9 to 91.4
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 0
0 to 0.5
Magnesium (Mg), % 94.9 to 97.1
2.1 to 2.9
Manganese (Mn), % 0
0 to 0.3
Silicon (Si), % 0
0 to 0.4
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 2.5 to 4.0
5.1 to 6.1
Zirconium (Zr), % 0.45 to 0.8
0 to 0.25
Residuals, % 0
0 to 0.15