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6351 Aluminum vs. EN-MC65220 Magnesium

6351 aluminum belongs to the aluminum alloys classification, while EN-MC65220 magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 6351 aluminum and the bottom bar is EN-MC65220 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
44
Elongation at Break, % 7.8 to 18
2.2
Fatigue Strength, MPa 79 to 130
110
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 84 to 200
150
Tensile Strength: Ultimate (UTS), MPa 140 to 310
270
Tensile Strength: Yield (Proof), MPa 95 to 270
200

Thermal Properties

Latent Heat of Fusion, J/g 410
340
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 650
610
Melting Onset (Solidus), °C 570
550
Specific Heat Capacity, J/kg-K 900
980
Thermal Conductivity, W/m-K 180
110
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
25
Electrical Conductivity: Equal Weight (Specific), % IACS 150
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.7
1.9
Embodied Carbon, kg CO2/kg material 8.3
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 38
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 65 to 540
450
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
62
Strength to Weight: Axial, points 14 to 32
40
Strength to Weight: Bending, points 22 to 38
49
Thermal Diffusivity, mm2/s 72
61
Thermal Shock Resistance, points 6.1 to 14
17

Alloy Composition

Aluminum (Al), % 96 to 98.5
0
Copper (Cu), % 0 to 0.1
0.050 to 0.1
Iron (Fe), % 0 to 0.5
0 to 0.010
Magnesium (Mg), % 0.4 to 0.8
93.8 to 96.8
Manganese (Mn), % 0.4 to 0.8
0 to 0.15
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 0.7 to 1.3
0 to 0.010
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), % 0 to 0.2
0 to 0.2
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.010