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AZ91A Magnesium vs. EN AC-46100 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while EN AC-46100 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AZ91A magnesium and the bottom bar is EN AC-46100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
91
Elastic (Young's, Tensile) Modulus, GPa 46
73
Elongation at Break, % 5.0
1.0
Fatigue Strength, MPa 99
110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
28
Tensile Strength: Ultimate (UTS), MPa 240
270
Tensile Strength: Yield (Proof), MPa 160
160

Thermal Properties

Latent Heat of Fusion, J/g 360
550
Maximum Temperature: Mechanical, °C 130
180
Melting Completion (Liquidus), °C 600
600
Melting Onset (Solidus), °C 470
540
Specific Heat Capacity, J/kg-K 990
890
Thermal Conductivity, W/m-K 73
110
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
28
Electrical Conductivity: Equal Weight (Specific), % IACS 52
90

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
2.7
Embodied Carbon, kg CO2/kg material 22
7.6
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 990
1030

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 280
170
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 69
51
Strength to Weight: Axial, points 38
27
Strength to Weight: Bending, points 49
34
Thermal Diffusivity, mm2/s 42
44
Thermal Shock Resistance, points 14
12

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
80.4 to 88.5
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0 to 0.1
1.5 to 2.5
Iron (Fe), % 0
0 to 1.1
Lead (Pb), % 0
0 to 0.25
Magnesium (Mg), % 88.2 to 91.2
0 to 0.3
Manganese (Mn), % 0.13 to 0.5
0 to 0.55
Nickel (Ni), % 0 to 0.030
0 to 0.45
Silicon (Si), % 0 to 0.5
10 to 12
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0.35 to 1.0
0 to 1.7
Residuals, % 0
0 to 0.25