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4145 Aluminum vs. AZ92A Magnesium

4145 aluminum belongs to the aluminum alloys classification, while AZ92A 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 AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
47
Elongation at Break, % 2.2
2.1 to 6.8
Fatigue Strength, MPa 48
76 to 90
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
18
Shear Strength, MPa 69
97 to 160
Tensile Strength: Ultimate (UTS), MPa 120
170 to 270
Tensile Strength: Yield (Proof), MPa 68
83 to 140

Thermal Properties

Latent Heat of Fusion, J/g 540
350
Maximum Temperature: Mechanical, °C 160
130
Melting Completion (Liquidus), °C 590
590
Melting Onset (Solidus), °C 520
440
Specific Heat Capacity, J/kg-K 880
980
Thermal Conductivity, W/m-K 100
44 to 58
Thermal Expansion, µm/m-K 21
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
11 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 84
53 to 62

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 2.8
1.8
Embodied Carbon, kg CO2/kg material 7.6
22
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1040
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
4.0 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 31
73 to 220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
67
Strength to Weight: Axial, points 12
26 to 41
Strength to Weight: Bending, points 19
38 to 51
Thermal Diffusivity, mm2/s 42
25 to 33
Thermal Shock Resistance, points 5.5
10 to 16

Alloy Composition

Aluminum (Al), % 83 to 87.4
8.3 to 9.7
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
0 to 0.25
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0 to 0.15
86.7 to 90
Manganese (Mn), % 0 to 0.15
0.1 to 0.35
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 9.3 to 10.7
0 to 0.3
Zinc (Zn), % 0 to 0.2
1.6 to 2.4
Residuals, % 0
0 to 0.3