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AM60A Magnesium vs. 7021 Aluminum

AM60A magnesium belongs to the magnesium alloys classification, while 7021 aluminum belongs to the aluminum 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 AM60A magnesium and the bottom bar is 7021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
69
Elongation at Break, % 8.8
9.4
Fatigue Strength, MPa 70
150
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
26
Shear Strength, MPa 130
270
Tensile Strength: Ultimate (UTS), MPa 230
460
Tensile Strength: Yield (Proof), MPa 130
390

Thermal Properties

Latent Heat of Fusion, J/g 350
380
Maximum Temperature: Mechanical, °C 120
200
Melting Completion (Liquidus), °C 620
630
Melting Onset (Solidus), °C 550
510
Specific Heat Capacity, J/kg-K 1000
870
Thermal Conductivity, W/m-K 62
150
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
38
Electrical Conductivity: Equal Weight (Specific), % IACS 69
120

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.9
Embodied Carbon, kg CO2/kg material 23
8.3
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17
41
Resilience: Unit (Modulus of Resilience), kJ/m3 190
1110
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 71
47
Strength to Weight: Axial, points 37
44
Strength to Weight: Bending, points 49
45
Thermal Diffusivity, mm2/s 37
59
Thermal Shock Resistance, points 14
20

Alloy Composition


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Aluminum (Al), % 5.5 to 6.5
90.7 to 93.7
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 0 to 0.35
0 to 0.25
Iron (Fe), % 0
0 to 0.4
Magnesium (Mg), % 91.8 to 94.4
1.2 to 1.8
Manganese (Mn), % 0.13 to 0.6
0 to 0.1
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.25
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.22
5.0 to 6.0
Zirconium (Zr), % 0
0.080 to 0.18
Residuals, % 0
0 to 0.15