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AZ91B Magnesium vs. EN AC-46500 Aluminum

AZ91B magnesium belongs to the magnesium alloys classification, while EN AC-46500 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 AZ91B magnesium and the bottom bar is EN AC-46500 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
91
Elastic (Young's, Tensile) Modulus, GPa 46
74
Elongation at Break, % 5.0
1.0
Fatigue Strength, MPa 79
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
520
Maximum Temperature: Mechanical, °C 130
180
Melting Completion (Liquidus), °C 600
610
Melting Onset (Solidus), °C 470
520
Specific Heat Capacity, J/kg-K 990
880
Thermal Conductivity, W/m-K 73
100
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
26
Electrical Conductivity: Equal Weight (Specific), % IACS 58
81

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
2.9
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
14
Stiffness to Weight: Bending, points 69
49
Strength to Weight: Axial, points 38
26
Strength to Weight: Bending, points 49
32
Thermal Diffusivity, mm2/s 42
41
Thermal Shock Resistance, points 14
12

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
77.9 to 90
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0 to 0.35
2.0 to 4.0
Iron (Fe), % 0
0 to 1.3
Lead (Pb), % 0
0 to 0.35
Magnesium (Mg), % 87.9 to 91.2
0.050 to 0.55
Manganese (Mn), % 0.13 to 0.5
0 to 0.55
Nickel (Ni), % 0 to 0.030
0 to 0.55
Silicon (Si), % 0 to 0.5
8.0 to 11
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0.35 to 1.0
0 to 3.0
Residuals, % 0
0 to 0.25