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390.0 Aluminum vs. AZ31C Magnesium

390.0 aluminum belongs to the aluminum alloys classification, while AZ31C 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 390.0 aluminum and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
45
Elongation at Break, % 1.0
12
Fatigue Strength, MPa 76 to 110
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
17
Tensile Strength: Ultimate (UTS), MPa 280 to 300
260
Tensile Strength: Yield (Proof), MPa 240 to 270
200

Thermal Properties

Latent Heat of Fusion, J/g 640
350
Maximum Temperature: Mechanical, °C 170
110
Melting Completion (Liquidus), °C 650
600
Melting Onset (Solidus), °C 560
550
Specific Heat Capacity, J/kg-K 880
990
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 18
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24 to 25
19
Electrical Conductivity: Equal Weight (Specific), % IACS 79 to 83
98

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 7.3
23
Embodied Energy, MJ/kg 130
160
Embodied Water, L/kg 950
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.7 to 2.9
28
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 470
440
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 52
70
Strength to Weight: Axial, points 28 to 30
42
Strength to Weight: Bending, points 35 to 36
53
Thermal Diffusivity, mm2/s 56
74
Thermal Shock Resistance, points 14 to 15
16

Alloy Composition

Aluminum (Al), % 74.5 to 79.6
2.4 to 3.6
Copper (Cu), % 4.0 to 5.0
0 to 0.1
Iron (Fe), % 0 to 1.3
0
Magnesium (Mg), % 0.45 to 0.65
93.4 to 97
Manganese (Mn), % 0 to 0.1
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 16 to 18
0 to 0.1
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0.5 to 1.5
Residuals, % 0
0 to 0.3