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3102 Aluminum vs. AZ31C Magnesium

3102 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 3102 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, % 23 to 28
12
Fatigue Strength, MPa 31 to 34
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 58 to 65
130
Tensile Strength: Ultimate (UTS), MPa 92 to 100
260
Tensile Strength: Yield (Proof), MPa 28 to 34
200

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 640
550
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 230
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 56
19
Electrical Conductivity: Equal Weight (Specific), % IACS 190
98

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.2
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1190
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 22
28
Resilience: Unit (Modulus of Resilience), kJ/m3 5.8 to 8.3
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 9.4 to 10
42
Strength to Weight: Bending, points 17 to 18
53
Thermal Diffusivity, mm2/s 92
74
Thermal Shock Resistance, points 4.1 to 4.4
16

Alloy Composition

Aluminum (Al), % 97.9 to 99.95
2.4 to 3.6
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0
93.4 to 97
Manganese (Mn), % 0.050 to 0.4
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.3
0.5 to 1.5
Residuals, % 0
0 to 0.3