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4145 Aluminum vs. EN-MC65120 Magnesium

4145 aluminum belongs to the aluminum alloys classification, while EN-MC65120 magnesium belongs to the magnesium alloys. There are 30 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 4145 aluminum and the bottom bar is EN-MC65120 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
45
Elongation at Break, % 2.2
3.1
Fatigue Strength, MPa 48
80
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
17
Shear Strength, MPa 69
92
Tensile Strength: Ultimate (UTS), MPa 120
160
Tensile Strength: Yield (Proof), MPa 68
110

Thermal Properties

Latent Heat of Fusion, J/g 540
330
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 590
590
Melting Onset (Solidus), °C 520
520
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 100
100
Thermal Expansion, µm/m-K 21
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
25
Electrical Conductivity: Equal Weight (Specific), % IACS 84
120

Otherwise Unclassified Properties

Base Metal Price, % relative 10
25
Density, g/cm3 2.8
1.9
Embodied Carbon, kg CO2/kg material 7.6
25
Embodied Energy, MJ/kg 140
190
Embodied Water, L/kg 1040
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
4.4
Resilience: Unit (Modulus of Resilience), kJ/m3 31
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
62
Strength to Weight: Axial, points 12
23
Strength to Weight: Bending, points 19
34
Thermal Diffusivity, mm2/s 42
56
Thermal Shock Resistance, points 5.5
9.8

Alloy Composition

Aluminum (Al), % 83 to 87.4
0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
0 to 0.030
Iron (Fe), % 0 to 0.8
0 to 0.010
Magnesium (Mg), % 0 to 0.15
91.8 to 95.1
Manganese (Mn), % 0 to 0.15
0 to 0.15
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 9.3 to 10.7
0 to 0.010
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0 to 0.2
2.0 to 3.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.010