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A390.0 Aluminum vs. AZ31C Magnesium

A390.0 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 A390.0 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, % 0.87 to 0.91
12
Fatigue Strength, MPa 70 to 100
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
17
Tensile Strength: Ultimate (UTS), MPa 190 to 290
260
Tensile Strength: Yield (Proof), MPa 190 to 290
200

Thermal Properties

Latent Heat of Fusion, J/g 640
350
Maximum Temperature: Mechanical, °C 170
110
Melting Completion (Liquidus), °C 580
600
Melting Onset (Solidus), °C 480
550
Specific Heat Capacity, J/kg-K 880
990
Thermal Conductivity, W/m-K 130
130
Thermal Expansion, µm/m-K 20
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 20
19
Electrical Conductivity: Equal Weight (Specific), % IACS 67
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 140
160
Embodied Water, L/kg 950
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 1.6 to 2.6
28
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 580
440
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 52
70
Strength to Weight: Axial, points 19 to 30
42
Strength to Weight: Bending, points 27 to 36
53
Thermal Diffusivity, mm2/s 56
74
Thermal Shock Resistance, points 9.0 to 14
16

Alloy Composition

Aluminum (Al), % 75.3 to 79.6
2.4 to 3.6
Copper (Cu), % 4.0 to 5.0
0 to 0.1
Iron (Fe), % 0 to 0.5
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