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AZ91A Magnesium vs. 4147 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while 4147 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AZ91A magnesium and the bottom bar is 4147 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
72
Elongation at Break, % 5.0
3.3
Fatigue Strength, MPa 99
42
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Shear Strength, MPa 140
63
Tensile Strength: Ultimate (UTS), MPa 240
110
Tensile Strength: Yield (Proof), MPa 160
59

Thermal Properties

Latent Heat of Fusion, J/g 360
570
Maximum Temperature: Mechanical, °C 130
160
Melting Completion (Liquidus), °C 600
580
Melting Onset (Solidus), °C 470
560
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 73
130
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
33
Electrical Conductivity: Equal Weight (Specific), % IACS 52
120

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.5
Embodied Carbon, kg CO2/kg material 22
7.7
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
3.1
Resilience: Unit (Modulus of Resilience), kJ/m3 280
24
Stiffness to Weight: Axial, points 15
16
Stiffness to Weight: Bending, points 69
55
Strength to Weight: Axial, points 38
12
Strength to Weight: Bending, points 49
20
Thermal Diffusivity, mm2/s 42
58
Thermal Shock Resistance, points 14
5.2

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
85 to 88.9
Beryllium (Be), % 0
0 to 0.00030
Copper (Cu), % 0 to 0.1
0 to 0.25
Iron (Fe), % 0
0 to 0.8
Magnesium (Mg), % 88.2 to 91.2
0.1 to 0.5
Manganese (Mn), % 0.13 to 0.5
0 to 0.1
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
11 to 13
Zinc (Zn), % 0.35 to 1.0
0 to 0.2
Residuals, % 0
0 to 0.15