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7175 Aluminum vs. ZK51A Magnesium

7175 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 7175 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 3.8 to 5.9
4.7
Fatigue Strength, MPa 150 to 180
62
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 290 to 330
160
Tensile Strength: Ultimate (UTS), MPa 520 to 570
240
Tensile Strength: Yield (Proof), MPa 430 to 490
150

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 480
550
Specific Heat Capacity, J/kg-K 870
970
Thermal Conductivity, W/m-K 140
110
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
28
Electrical Conductivity: Equal Weight (Specific), % IACS 99
140

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.0
1.8
Embodied Carbon, kg CO2/kg material 8.2
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1130
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
10
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
64
Strength to Weight: Axial, points 48 to 52
36
Strength to Weight: Bending, points 48 to 51
47
Thermal Diffusivity, mm2/s 53
61
Thermal Shock Resistance, points 23 to 25
15

Alloy Composition

Aluminum (Al), % 88 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 0.2
0
Magnesium (Mg), % 2.1 to 2.9
93.1 to 95.9
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.15
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.1 to 6.1
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3