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7020 Aluminum vs. EZ33A Magnesium

7020 aluminum belongs to the aluminum alloys classification, while EZ33A magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 7020 aluminum and the bottom bar is EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45 to 100
55
Elastic (Young's, Tensile) Modulus, GPa 70
44
Elongation at Break, % 8.4 to 14
2.6
Fatigue Strength, MPa 110 to 130
70
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 110 to 230
140
Tensile Strength: Ultimate (UTS), MPa 190 to 390
150
Tensile Strength: Yield (Proof), MPa 120 to 310
100

Thermal Properties

Latent Heat of Fusion, J/g 380
330
Maximum Temperature: Mechanical, °C 210
250
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 610
570
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 150
100
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
24
Electrical Conductivity: Equal Weight (Specific), % IACS 120
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
25
Density, g/cm3 2.9
1.9
Embodied Carbon, kg CO2/kg material 8.3
25
Embodied Energy, MJ/kg 150
190
Embodied Water, L/kg 1150
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
3.6
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
61
Strength to Weight: Axial, points 18 to 37
22
Strength to Weight: Bending, points 25 to 41
33
Thermal Diffusivity, mm2/s 59
54
Thermal Shock Resistance, points 8.3 to 17
9.2

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0 to 0.1
Iron (Fe), % 0 to 0.4
0
Magnesium (Mg), % 1.0 to 1.4
91.5 to 95
Manganese (Mn), % 0.050 to 0.5
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.35
0
Titanium (Ti), % 0 to 0.25
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 4.0 to 5.0
2.0 to 3.1
Zirconium (Zr), % 0.080 to 0.25
0.5 to 1.0
Residuals, % 0
0 to 0.3