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7178 Aluminum vs. AZ63A Magnesium

7178 aluminum belongs to the aluminum alloys classification, while AZ63A 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 7178 aluminum and the bottom bar is AZ63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
46
Elongation at Break, % 4.5 to 12
2.2 to 8.0
Fatigue Strength, MPa 120 to 210
76 to 83
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
18
Shear Strength, MPa 140 to 380
110 to 160
Tensile Strength: Ultimate (UTS), MPa 240 to 640
190 to 270
Tensile Strength: Yield (Proof), MPa 120 to 560
81 to 120

Thermal Properties

Latent Heat of Fusion, J/g 370
350
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 630
610
Melting Onset (Solidus), °C 480
450
Specific Heat Capacity, J/kg-K 860
980
Thermal Conductivity, W/m-K 130
52 to 65
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
12 to 15
Electrical Conductivity: Equal Weight (Specific), % IACS 91
59 to 74

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 3.1
1.8
Embodied Carbon, kg CO2/kg material 8.2
22
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1110
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
3.7 to 16
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
71 to 160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
66
Strength to Weight: Axial, points 21 to 58
29 to 41
Strength to Weight: Bending, points 28 to 54
40 to 51
Thermal Diffusivity, mm2/s 47
29 to 37
Thermal Shock Resistance, points 10 to 28
11 to 16

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
5.3 to 6.7
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
0 to 0.25
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.4 to 3.1
88.6 to 92.1
Manganese (Mn), % 0 to 0.3
0.15 to 0.35
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0 to 0.3
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
2.5 to 3.5
Residuals, % 0
0 to 0.3

Comparable Variants