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851.0 Aluminum vs. EQ21A Magnesium

851.0 aluminum belongs to the aluminum alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is 851.0 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
44
Elongation at Break, % 3.9 to 9.1
2.4
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Tensile Strength: Ultimate (UTS), MPa 130 to 140
250

Thermal Properties

Latent Heat of Fusion, J/g 410
340
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 360
560
Solidification (Pattern Maker's) Shrinkage, % 1.3
1.3
Specific Heat Capacity, J/kg-K 850
980
Thermal Conductivity, W/m-K 180
110
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
25
Electrical Conductivity: Equal Weight (Specific), % IACS 140
120

Otherwise Unclassified Properties

Base Metal Price, % relative 14
80
Density, g/cm3 3.1
1.9
Embodied Carbon, kg CO2/kg material 8.4
27
Embodied Energy, MJ/kg 160
210

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
63
Strength to Weight: Axial, points 12 to 13
37
Strength to Weight: Bending, points 19 to 20
47
Thermal Diffusivity, mm2/s 69
62
Thermal Shock Resistance, points 6.1 to 6.3
15

Alloy Composition

Aluminum (Al), % 86.6 to 91.5
0
Copper (Cu), % 0.7 to 1.3
0.050 to 0.1
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0 to 0.1
93.9 to 96.8
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0.3 to 0.7
0 to 0.010
Silicon (Si), % 2.0 to 3.0
0
Silver (Ag), % 0
1.3 to 1.7
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3