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7075 Aluminum vs. ZC63A Magnesium

7075 aluminum belongs to the aluminum alloys classification, while ZC63A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 7075 aluminum and the bottom bar is ZC63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
48
Elongation at Break, % 1.8 to 12
3.3
Fatigue Strength, MPa 110 to 190
94
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
19
Shear Strength, MPa 150 to 340
130
Tensile Strength: Ultimate (UTS), MPa 240 to 590
220
Tensile Strength: Yield (Proof), MPa 120 to 510
130

Thermal Properties

Latent Heat of Fusion, J/g 380
330
Maximum Temperature: Mechanical, °C 200
98
Melting Completion (Liquidus), °C 640
550
Melting Onset (Solidus), °C 480
470
Specific Heat Capacity, J/kg-K 870
950
Thermal Conductivity, W/m-K 130
120
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
32
Electrical Conductivity: Equal Weight (Specific), % IACS 98
140

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.0
2.1
Embodied Carbon, kg CO2/kg material 8.3
22
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1120
920

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
6.3
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
190
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
58
Strength to Weight: Axial, points 22 to 54
29
Strength to Weight: Bending, points 28 to 52
38
Thermal Diffusivity, mm2/s 50
58
Thermal Shock Resistance, points 10 to 25
12

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
2.4 to 3.0
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.1 to 2.9
89.2 to 91.9
Manganese (Mn), % 0 to 0.3
0.25 to 0.75
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0 to 0.2
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 5.1 to 6.1
5.5 to 6.5
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0
0 to 0.3