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EQ21A Magnesium vs. 4145 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 4145 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EQ21A magnesium and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
73
Elongation at Break, % 2.4
2.2
Fatigue Strength, MPa 110
48
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
28
Shear Strength, MPa 150
69
Tensile Strength: Ultimate (UTS), MPa 250
120
Tensile Strength: Yield (Proof), MPa 190
68

Thermal Properties

Latent Heat of Fusion, J/g 340
540
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 640
590
Melting Onset (Solidus), °C 560
520
Specific Heat Capacity, J/kg-K 980
880
Thermal Conductivity, W/m-K 110
100
Thermal Expansion, µm/m-K 27
21

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 80
10
Density, g/cm3 1.9
2.8
Embodied Carbon, kg CO2/kg material 27
7.6
Embodied Energy, MJ/kg 210
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 410
31
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
50
Strength to Weight: Axial, points 37
12
Strength to Weight: Bending, points 47
19
Thermal Diffusivity, mm2/s 62
42
Thermal Shock Resistance, points 15
5.5

Alloy Composition

Aluminum (Al), % 0
83 to 87.4
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0.050 to 0.1
3.3 to 4.7
Iron (Fe), % 0
0 to 0.8
Magnesium (Mg), % 93.9 to 96.8
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
9.3 to 10.7
Silver (Ag), % 1.3 to 1.7
0
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0
0 to 0.15