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AM60A Magnesium vs. 5251 Aluminum

AM60A magnesium belongs to the magnesium alloys classification, while 5251 aluminum belongs to the aluminum alloys.

For each property being compared, the top bar is AM60A magnesium and the bottom bar is 5251 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62
44 to 79
Elastic (Young's, Tensile) Modulus, GPa 45
68
Elongation at Break, % 8.8
2.0 to 19
Fatigue Strength, MPa 70
59 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 130
110 to 160
Tensile Strength: Ultimate (UTS), MPa 230
180 to 280
Tensile Strength: Yield (Proof), MPa 130
67 to 250

Thermal Properties

Latent Heat of Fusion, J/g 350
400
Maximum Temperature: Mechanical, °C 120
180
Melting Completion (Liquidus), °C 620
650
Melting Onset (Solidus), °C 550
610
Specific Heat Capacity, J/kg-K 1000
900
Thermal Conductivity, W/m-K 62
150
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
37
Electrical Conductivity: Equal Weight (Specific), % IACS 69
120

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.7
Embodied Carbon, kg CO2/kg material 23
8.5
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17
5.4 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 190
33 to 450
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
50
Strength to Weight: Axial, points 37
18 to 29
Strength to Weight: Bending, points 49
26 to 35
Thermal Diffusivity, mm2/s 37
61
Thermal Shock Resistance, points 14
7.9 to 13

Alloy Composition


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Aluminum (Al), % 5.5 to 6.5
95.5 to 98.2
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0 to 0.35
0 to 0.15
Iron (Fe), % 0
0 to 0.5
Magnesium (Mg), % 91.8 to 94.4
1.7 to 2.4
Manganese (Mn), % 0.13 to 0.6
0.1 to 0.5
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.4
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0 to 0.22
0 to 0.15
Residuals, % 0
0 to 0.15