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771.0 Aluminum vs. EQ21A Magnesium

771.0 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 771.0 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85 to 120
80
Elastic (Young's, Tensile) Modulus, GPa 70
44
Elongation at Break, % 1.7 to 6.5
2.4
Fatigue Strength, MPa 92 to 180
110
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
17
Tensile Strength: Ultimate (UTS), MPa 250 to 370
250
Tensile Strength: Yield (Proof), MPa 210 to 350
190

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 620
560
Solidification (Pattern Maker's) Shrinkage, % 1.6
1.3
Specific Heat Capacity, J/kg-K 870
980
Thermal Conductivity, W/m-K 140 to 150
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
25
Electrical Conductivity: Equal Weight (Specific), % IACS 82
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 3.0
1.9
Embodied Carbon, kg CO2/kg material 8.0
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 20
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 900
410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
63
Strength to Weight: Axial, points 23 to 35
37
Strength to Weight: Bending, points 29 to 39
47
Thermal Diffusivity, mm2/s 54 to 58
62
Thermal Shock Resistance, points 11 to 16
15

Alloy Composition

Aluminum (Al), % 90.5 to 92.5
0
Chromium (Cr), % 0.060 to 0.2
0
Copper (Cu), % 0 to 0.1
0.050 to 0.1
Iron (Fe), % 0 to 0.15
0
Magnesium (Mg), % 0.8 to 1.0
93.9 to 96.8
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.15
0
Silver (Ag), % 0
1.3 to 1.7
Titanium (Ti), % 0.1 to 0.2
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Zinc (Zn), % 6.5 to 7.5
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3