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7116 Aluminum vs. ISO-WD32250 Magnesium

7116 aluminum belongs to the aluminum alloys classification, while ISO-WD32250 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 7116 aluminum and the bottom bar is ISO-WD32250 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 7.8
4.5 to 8.6
Fatigue Strength, MPa 160
170 to 210
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 220
180 to 190
Tensile Strength: Ultimate (UTS), MPa 370
310 to 330
Tensile Strength: Yield (Proof), MPa 330
240 to 290

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 520
550
Specific Heat Capacity, J/kg-K 880
980
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
25
Electrical Conductivity: Equal Weight (Specific), % IACS 140
130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.9
1.8
Embodied Carbon, kg CO2/kg material 8.2
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1150
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28
14 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 790
630 to 930
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
67
Strength to Weight: Axial, points 35
49 to 51
Strength to Weight: Bending, points 39
58 to 60
Thermal Diffusivity, mm2/s 58
72
Thermal Shock Resistance, points 16
19 to 20

Alloy Composition

Aluminum (Al), % 91.5 to 94.5
0
Copper (Cu), % 0.5 to 1.1
0
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0
Magnesium (Mg), % 0.8 to 1.4
94.9 to 97.1
Manganese (Mn), % 0 to 0.050
0
Silicon (Si), % 0 to 0.15
0
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
2.5 to 4.0
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3