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7049A Aluminum vs. ISO-WD32250 Magnesium

7049A 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 7049A aluminum and the bottom bar is ISO-WD32250 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
45
Elongation at Break, % 5.0 to 5.7
4.5 to 8.6
Fatigue Strength, MPa 180
170 to 210
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 340 to 350
180 to 190
Tensile Strength: Ultimate (UTS), MPa 580 to 590
310 to 330
Tensile Strength: Yield (Proof), MPa 500 to 530
240 to 290

Thermal Properties

Latent Heat of Fusion, J/g 370
340
Maximum Temperature: Mechanical, °C 200
120
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 430
550
Specific Heat Capacity, J/kg-K 850
980
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
25
Electrical Conductivity: Equal Weight (Specific), % IACS 120
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.1
1.8
Embodied Carbon, kg CO2/kg material 8.2
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1100
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28 to 32
14 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 1800 to 1990
630 to 930
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 44
67
Strength to Weight: Axial, points 52 to 53
49 to 51
Strength to Weight: Bending, points 50 to 51
58 to 60
Thermal Diffusivity, mm2/s 50
72
Thermal Shock Resistance, points 25
19 to 20

Alloy Composition

Aluminum (Al), % 84.6 to 89.5
0
Chromium (Cr), % 0.050 to 0.25
0
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 2.1 to 3.1
94.9 to 97.1
Manganese (Mn), % 0 to 0.5
0
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 7.2 to 8.4
2.5 to 4.0
Zirconium (Zr), % 0 to 0.25
0.45 to 0.8
Residuals, % 0
0 to 0.3