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1085 Aluminum vs. ZK51A Magnesium

1085 aluminum belongs to the aluminum alloys classification, while ZK51A 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 1085 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
45
Elongation at Break, % 4.5 to 39
4.7
Fatigue Strength, MPa 22 to 49
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 48 to 79
160
Tensile Strength: Ultimate (UTS), MPa 73 to 140
240
Tensile Strength: Yield (Proof), MPa 17 to 120
150

Thermal Properties

Latent Heat of Fusion, J/g 400
340
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 640
550
Specific Heat Capacity, J/kg-K 900
970
Thermal Conductivity, W/m-K 230
110
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 61
28
Electrical Conductivity: Equal Weight (Specific), % IACS 200
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
1.8
Embodied Carbon, kg CO2/kg material 8.3
24
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 1200
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.8 to 21
10
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 110
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
64
Strength to Weight: Axial, points 7.5 to 14
36
Strength to Weight: Bending, points 14 to 22
47
Thermal Diffusivity, mm2/s 94
61
Thermal Shock Resistance, points 3.3 to 6.1
15

Alloy Composition

Aluminum (Al), % 99.85 to 100
0
Copper (Cu), % 0 to 0.030
0 to 0.1
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.12
0
Magnesium (Mg), % 0 to 0.020
93.1 to 95.9
Manganese (Mn), % 0 to 0.020
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.1
0
Titanium (Ti), % 0 to 0.020
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.030
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3