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4115 Aluminum vs. AZ31C Magnesium

4115 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 (1, in this case) are not shown.

For each property being compared, the top bar is 4115 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, % 1.1 to 11
12
Fatigue Strength, MPa 39 to 76
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 71 to 130
130
Tensile Strength: Ultimate (UTS), MPa 120 to 220
260
Tensile Strength: Yield (Proof), MPa 39 to 190
200

Thermal Properties

Latent Heat of Fusion, J/g 420
350
Maximum Temperature: Mechanical, °C 160
110
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 590
550
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 160
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
19
Electrical Conductivity: Equal Weight (Specific), % IACS 140
98

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.1
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1160
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.1 to 10
28
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 270
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 12 to 23
42
Strength to Weight: Bending, points 20 to 30
53
Thermal Diffusivity, mm2/s 66
74
Thermal Shock Resistance, points 5.2 to 9.9
16

Alloy Composition

Aluminum (Al), % 94.6 to 97.4
2.4 to 3.6
Copper (Cu), % 0.1 to 0.5
0 to 0.1
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0.1 to 0.5
93.4 to 97
Manganese (Mn), % 0.6 to 1.2
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 1.8 to 2.2
0 to 0.1
Zinc (Zn), % 0 to 0.2
0.5 to 1.5
Residuals, % 0
0 to 0.3