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2117 Aluminum vs. EQ21A Magnesium

2117 aluminum belongs to the aluminum alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is 2117 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
80
Elastic (Young's, Tensile) Modulus, GPa 71
44
Elongation at Break, % 26
2.4
Fatigue Strength, MPa 95
110
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 200
150
Tensile Strength: Ultimate (UTS), MPa 300
250
Tensile Strength: Yield (Proof), MPa 170
190

Thermal Properties

Latent Heat of Fusion, J/g 400
340
Maximum Temperature: Mechanical, °C 220
160
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 550
560
Specific Heat Capacity, J/kg-K 880
980
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 10
80
Density, g/cm3 3.0
1.9
Embodied Carbon, kg CO2/kg material 8.2
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 190
410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
63
Strength to Weight: Axial, points 28
37
Strength to Weight: Bending, points 33
47
Thermal Diffusivity, mm2/s 59
62
Thermal Shock Resistance, points 12
15

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 2.2 to 4.5
0.050 to 0.1
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0.2 to 1.0
93.9 to 96.8
Manganese (Mn), % 0.4 to 1.0
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0.2 to 0.8
0
Silver (Ag), % 0
1.3 to 1.7
Titanium (Ti), % 0 to 0.25
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.25
0.4 to 1.0
Residuals, % 0 to 0.15
0 to 0.3