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7178-T6 Aluminum vs. AM100A-T6 Magnesium

7178-T6 aluminum belongs to the aluminum alloys classification, while AM100A-T6 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-T6 aluminum and the bottom bar is AM100A-T6 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
46
Elongation at Break, % 8.5
2.3
Fatigue Strength, MPa 210
62
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
18
Shear Strength, MPa 380
150
Tensile Strength: Ultimate (UTS), MPa 640
270
Tensile Strength: Yield (Proof), MPa 550
120

Thermal Properties

Latent Heat of Fusion, J/g 370
350
Maximum Temperature: Mechanical, °C 180
140
Melting Completion (Liquidus), °C 630
590
Melting Onset (Solidus), °C 480
460
Specific Heat Capacity, J/kg-K 860
990
Thermal Conductivity, W/m-K 130
73
Thermal Expansion, µm/m-K 23
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
11
Electrical Conductivity: Equal Weight (Specific), % IACS 91
59

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 3.1
1.7
Embodied Carbon, kg CO2/kg material 8.2
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1110
1000

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
4.9
Resilience: Unit (Modulus of Resilience), kJ/m3 2180
160
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 45
70
Strength to Weight: Axial, points 57
43
Strength to Weight: Bending, points 53
54
Thermal Diffusivity, mm2/s 47
43
Thermal Shock Resistance, points 28
16

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
9.3 to 10.7
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
0 to 0.1
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.4 to 3.1
87.9 to 90.6
Manganese (Mn), % 0 to 0.3
0.1 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
0 to 0.3
Residuals, % 0
0 to 0.3