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7075 Aluminum vs. ZK61A Magnesium

7075 aluminum belongs to the aluminum alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 7075 aluminum and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
46
Elongation at Break, % 1.8 to 12
5.8 to 7.1
Fatigue Strength, MPa 110 to 190
120 to 140
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 150 to 340
170 to 180
Tensile Strength: Ultimate (UTS), MPa 240 to 590
290 to 310
Tensile Strength: Yield (Proof), MPa 120 to 510
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 380
330
Maximum Temperature: Mechanical, °C 200
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 480
530
Specific Heat Capacity, J/kg-K 870
960
Thermal Conductivity, W/m-K 130
120
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
29
Electrical Conductivity: Equal Weight (Specific), % IACS 98
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.0
1.9
Embodied Carbon, kg CO2/kg material 8.3
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1120
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8 to 44
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 1870
370 to 420
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
62
Strength to Weight: Axial, points 22 to 54
42 to 45
Strength to Weight: Bending, points 28 to 52
50 to 53
Thermal Diffusivity, mm2/s 50
65
Thermal Shock Resistance, points 10 to 25
17 to 18

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 to 0.1
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.1 to 2.9
92.1 to 93.9
Manganese (Mn), % 0 to 0.3
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0
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
0.6 to 1.0
Residuals, % 0
0 to 0.3

Comparable Variants