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3203 Aluminum vs. AZ31C Magnesium

3203 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 3203 aluminum and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 4.5 to 29
12
Fatigue Strength, MPa 46 to 92
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 72 to 120
130
Tensile Strength: Ultimate (UTS), MPa 110 to 200
260
Tensile Strength: Yield (Proof), MPa 39 to 190
200

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 650
600
Melting Onset (Solidus), °C 620
550
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 170
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
19
Electrical Conductivity: Equal Weight (Specific), % IACS 140
98

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
12
Density, g/cm3 2.8
1.7
Embodied Carbon, kg CO2/kg material 8.1
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0 to 25
28
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 250
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 11 to 20
42
Strength to Weight: Bending, points 19 to 28
53
Thermal Diffusivity, mm2/s 70
74
Thermal Shock Resistance, points 4.9 to 8.8
16

Alloy Composition

Aluminum (Al), % 96.9 to 99
2.4 to 3.6
Copper (Cu), % 0 to 0.050
0 to 0.1
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0
93.4 to 97
Manganese (Mn), % 1.0 to 1.5
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.1
Zinc (Zn), % 0 to 0.1
0.5 to 1.5
Residuals, % 0
0 to 0.3