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4045 Aluminum vs. AZ92A Magnesium

4045 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 4045 aluminum and the bottom bar is AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
47
Elongation at Break, % 2.3
2.1 to 6.8
Fatigue Strength, MPa 45
76 to 90
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
18
Shear Strength, MPa 69
97 to 160
Tensile Strength: Ultimate (UTS), MPa 120
170 to 270
Tensile Strength: Yield (Proof), MPa 64
83 to 140

Thermal Properties

Latent Heat of Fusion, J/g 540
350
Maximum Temperature: Mechanical, °C 160
130
Melting Completion (Liquidus), °C 600
590
Melting Onset (Solidus), °C 580
440
Specific Heat Capacity, J/kg-K 900
980
Thermal Conductivity, W/m-K 170
44 to 58
Thermal Expansion, µm/m-K 21
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 45
11 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 160
53 to 62

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.6
1.8
Embodied Carbon, kg CO2/kg material 7.8
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1070
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.4
4.0 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 29
73 to 220
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 54
67
Strength to Weight: Axial, points 13
26 to 41
Strength to Weight: Bending, points 21
38 to 51
Thermal Diffusivity, mm2/s 74
25 to 33
Thermal Shock Resistance, points 5.7
10 to 16

Alloy Composition

Aluminum (Al), % 87.4 to 91
8.3 to 9.7
Copper (Cu), % 0 to 0.3
0 to 0.25
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0 to 0.050
86.7 to 90
Manganese (Mn), % 0 to 0.050
0.1 to 0.35
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 9.0 to 11
0 to 0.3
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
1.6 to 2.4
Residuals, % 0
0 to 0.3