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705.0 Aluminum vs. ZK51A Magnesium

705.0 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 (2, in this case) are not shown.

For each property being compared, the top bar is 705.0 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 8.4 to 10
4.7
Fatigue Strength, MPa 63 to 98
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Tensile Strength: Ultimate (UTS), MPa 240 to 260
240
Tensile Strength: Yield (Proof), MPa 130
150

Thermal Properties

Latent Heat of Fusion, J/g 390
340
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
550
Solidification (Pattern Maker's) Shrinkage, % 1.6
1.3
Specific Heat Capacity, J/kg-K 890
970
Thermal Conductivity, W/m-K 140
110
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
28
Electrical Conductivity: Equal Weight (Specific), % IACS 110
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.8
1.8
Embodied Carbon, kg CO2/kg material 8.4
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1170
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 20
10
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 130
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
64
Strength to Weight: Axial, points 24 to 26
36
Strength to Weight: Bending, points 31 to 32
47
Thermal Diffusivity, mm2/s 55
61
Thermal Shock Resistance, points 11
15

Alloy Composition

Aluminum (Al), % 92.3 to 98.6
0
Chromium (Cr), % 0 to 0.4
0
Copper (Cu), % 0 to 0.2
0 to 0.1
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 1.4 to 1.8
93.1 to 95.9
Manganese (Mn), % 0 to 0.6
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.2
0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 3.3
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3