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3105 Aluminum vs. AZ31C Magnesium

3105 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys. There are 30 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 3105 aluminum and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 1.1 to 20
12
Fatigue Strength, MPa 39 to 95
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 77 to 140
130
Tensile Strength: Ultimate (UTS), MPa 120 to 240
260
Tensile Strength: Yield (Proof), MPa 46 to 220
200

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 660
600
Melting Onset (Solidus), °C 640
550
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 170
130
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
19
Electrical Conductivity: Equal Weight (Specific), % IACS 140
98

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.8
1.7
Embodied Carbon, kg CO2/kg material 8.2
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
28
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 12 to 24
42
Strength to Weight: Bending, points 20 to 31
53
Thermal Diffusivity, mm2/s 68
74
Thermal Shock Resistance, points 5.2 to 11
16

Alloy Composition

Aluminum (Al), % 96 to 99.5
2.4 to 3.6
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.3
0 to 0.1
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0.2 to 0.8
93.4 to 97
Manganese (Mn), % 0.3 to 0.8
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
0.5 to 1.5
Residuals, % 0
0 to 0.3