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3104 Aluminum vs. AZ31C Magnesium

3104 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 3104 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 20
12
Fatigue Strength, MPa 74 to 130
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 110 to 180
130
Tensile Strength: Ultimate (UTS), MPa 170 to 310
260
Tensile Strength: Yield (Proof), MPa 68 to 270
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 600
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 130
98

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.8
1.7
Embodied Carbon, kg CO2/kg material 8.4
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 1.6 to 60
28
Resilience: Unit (Modulus of Resilience), kJ/m3 34 to 540
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 17 to 31
42
Strength to Weight: Bending, points 25 to 37
53
Thermal Diffusivity, mm2/s 64
74
Thermal Shock Resistance, points 7.6 to 13
16

Alloy Composition

Aluminum (Al), % 95.1 to 98.4
2.4 to 3.6
Copper (Cu), % 0.050 to 0.25
0 to 0.1
Gallium (Ga), % 0 to 0.050
0
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0.8 to 1.3
93.4 to 97
Manganese (Mn), % 0.8 to 1.4
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.25
0.5 to 1.5
Residuals, % 0
0 to 0.3