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5251 Aluminum vs. AM100A Magnesium

5251 aluminum belongs to the aluminum alloys classification, while AM100A 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 5251 aluminum and the bottom bar is AM100A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
46
Elongation at Break, % 2.0 to 19
1.0 to 6.8
Fatigue Strength, MPa 59 to 110
48 to 70
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 110 to 160
90 to 150
Tensile Strength: Ultimate (UTS), MPa 180 to 280
160 to 270
Tensile Strength: Yield (Proof), MPa 67 to 250
78 to 140

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 180
140
Melting Completion (Liquidus), °C 650
590
Melting Onset (Solidus), °C 610
460
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 150
73
Thermal Expansion, µm/m-K 24
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
11
Electrical Conductivity: Equal Weight (Specific), % IACS 120
59

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.5
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
1000

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.4 to 27
1.3 to 15
Resilience: Unit (Modulus of Resilience), kJ/m3 33 to 450
66 to 210
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 18 to 29
25 to 44
Strength to Weight: Bending, points 26 to 35
38 to 54
Thermal Diffusivity, mm2/s 61
43
Thermal Shock Resistance, points 7.9 to 13
9.7 to 17

Alloy Composition

Aluminum (Al), % 95.5 to 98.2
9.3 to 10.7
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0 to 0.1
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 1.7 to 2.4
87.9 to 90.6
Manganese (Mn), % 0.1 to 0.5
0.1 to 0.35
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0 to 0.3
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.15
0 to 0.3
Residuals, % 0
0 to 0.3

Comparable Variants