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8079 Aluminum vs. ZK61A Magnesium

8079 aluminum belongs to the aluminum alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 29 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 8079 aluminum and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
46
Elongation at Break, % 2.2
5.8 to 7.1
Fatigue Strength, MPa 56
120 to 140
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Tensile Strength: Ultimate (UTS), MPa 150
290 to 310
Tensile Strength: Yield (Proof), MPa 120
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 400
330
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 640
530
Specific Heat Capacity, J/kg-K 900
960
Thermal Conductivity, W/m-K 230
120
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 58
29
Electrical Conductivity: Equal Weight (Specific), % IACS 190
130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
13
Density, g/cm3 2.8
1.9
Embodied Carbon, kg CO2/kg material 8.2
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.1
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 110
370 to 420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
62
Strength to Weight: Axial, points 15
42 to 45
Strength to Weight: Bending, points 22
50 to 53
Thermal Diffusivity, mm2/s 92
65
Thermal Shock Resistance, points 6.4
17 to 18

Alloy Composition

Aluminum (Al), % 98.1 to 99.3
0
Copper (Cu), % 0 to 0.050
0 to 0.1
Iron (Fe), % 0.7 to 1.3
0
Magnesium (Mg), % 0
92.1 to 93.9
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0.050 to 0.3
0
Zinc (Zn), % 0 to 0.1
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3