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7049A Aluminum vs. ISO-WD21150 Magnesium

7049A aluminum belongs to the aluminum alloys classification, while ISO-WD21150 magnesium belongs to the magnesium alloys. There are 29 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 7049A aluminum and the bottom bar is ISO-WD21150 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
45
Elongation at Break, % 5.0 to 5.7
5.7 to 11
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 340 to 350
150 to 170
Tensile Strength: Ultimate (UTS), MPa 580 to 590
240 to 290
Tensile Strength: Yield (Proof), MPa 500 to 530
120 to 200

Thermal Properties

Latent Heat of Fusion, J/g 370
350
Maximum Temperature: Mechanical, °C 200
110
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 430
550
Specific Heat Capacity, J/kg-K 850
990
Thermal Conductivity, W/m-K 130
100
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
19
Electrical Conductivity: Equal Weight (Specific), % IACS 120
100

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 3.1
1.7
Embodied Carbon, kg CO2/kg material 8.2
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1100
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28 to 32
15 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 1800 to 1990
160 to 460
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 44
70
Strength to Weight: Axial, points 52 to 53
40 to 48
Strength to Weight: Bending, points 50 to 51
52 to 58
Thermal Diffusivity, mm2/s 50
60
Thermal Shock Resistance, points 25
15 to 17

Alloy Composition

Aluminum (Al), % 84.6 to 89.5
2.4 to 3.6
Chromium (Cr), % 0.050 to 0.25
0
Copper (Cu), % 1.2 to 1.9
0 to 0.050
Iron (Fe), % 0 to 0.5
0 to 0.0050
Magnesium (Mg), % 2.1 to 3.1
94 to 97
Manganese (Mn), % 0 to 0.5
0.15 to 0.4
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.4
0 to 0.1
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 7.2 to 8.4
0.5 to 1.5
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0
0 to 0.3