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7076 Aluminum vs. EQ21A Magnesium

7076 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 7076 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
80
Elastic (Young's, Tensile) Modulus, GPa 70
44
Elongation at Break, % 6.2
2.4
Fatigue Strength, MPa 170
110
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 310
150
Tensile Strength: Ultimate (UTS), MPa 530
250
Tensile Strength: Yield (Proof), MPa 460
190

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 460
560
Specific Heat Capacity, J/kg-K 860
980
Thermal Conductivity, W/m-K 140
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
25
Electrical Conductivity: Equal Weight (Specific), % IACS 100
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 31
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 1510
410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
63
Strength to Weight: Axial, points 49
37
Strength to Weight: Bending, points 48
47
Thermal Diffusivity, mm2/s 54
62
Thermal Shock Resistance, points 23
15

Alloy Composition

Aluminum (Al), % 86.9 to 91.2
0
Copper (Cu), % 0.3 to 1.0
0.050 to 0.1
Iron (Fe), % 0 to 0.6
0
Magnesium (Mg), % 1.2 to 2.0
93.9 to 96.8
Manganese (Mn), % 0.3 to 0.8
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0
Silver (Ag), % 0
1.3 to 1.7
Titanium (Ti), % 0 to 0.2
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Zinc (Zn), % 7.0 to 8.0
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3