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7076 Aluminum vs. EN-MC21210 Magnesium

7076 aluminum belongs to the aluminum alloys classification, while EN-MC21210 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 7076 aluminum and the bottom bar is EN-MC21210 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
48
Elastic (Young's, Tensile) Modulus, GPa 70
44
Elongation at Break, % 6.2
14
Fatigue Strength, MPa 170
70
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 310
110
Tensile Strength: Ultimate (UTS), MPa 530
190
Tensile Strength: Yield (Proof), MPa 460
90

Thermal Properties

Latent Heat of Fusion, J/g 380
350
Maximum Temperature: Mechanical, °C 170
100
Melting Completion (Liquidus), °C 630
600
Melting Onset (Solidus), °C 460
570
Specific Heat Capacity, J/kg-K 860
1000
Thermal Conductivity, W/m-K 140
120
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
24
Electrical Conductivity: Equal Weight (Specific), % IACS 100
130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 3.0
1.6
Embodied Carbon, kg CO2/kg material 8.0
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1110
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31
22
Resilience: Unit (Modulus of Resilience), kJ/m3 1510
92
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 45
72
Strength to Weight: Axial, points 49
32
Strength to Weight: Bending, points 48
44
Thermal Diffusivity, mm2/s 54
76
Thermal Shock Resistance, points 23
11

Alloy Composition

Aluminum (Al), % 86.9 to 91.2
1.6 to 2.6
Copper (Cu), % 0.3 to 1.0
0 to 0.010
Iron (Fe), % 0 to 0.6
0 to 0.0050
Magnesium (Mg), % 1.2 to 2.0
96.3 to 98.3
Manganese (Mn), % 0.3 to 0.8
0.1 to 0.7
Nickel (Ni), % 0
0 to 0.0020
Silicon (Si), % 0 to 0.4
0 to 0.1
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 7.0 to 8.0
0 to 0.2
Residuals, % 0
0 to 0.010