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5051A Aluminum vs. ZK61A Magnesium

5051A aluminum belongs to the aluminum alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 5051A aluminum and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
46
Elongation at Break, % 18 to 21
5.8 to 7.1
Fatigue Strength, MPa 51 to 61
120 to 140
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 110
170 to 180
Tensile Strength: Ultimate (UTS), MPa 170
290 to 310
Tensile Strength: Yield (Proof), MPa 56
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 400
330
Maximum Temperature: Mechanical, °C 190
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
530
Specific Heat Capacity, J/kg-K 900
960
Thermal Conductivity, W/m-K 150
120
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
29
Electrical Conductivity: Equal Weight (Specific), % IACS 130
130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
1.9
Embodied Carbon, kg CO2/kg material 8.5
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1190
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 27
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 23
370 to 420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
62
Strength to Weight: Axial, points 17 to 18
42 to 45
Strength to Weight: Bending, points 25
50 to 53
Thermal Diffusivity, mm2/s 63
65
Thermal Shock Resistance, points 7.6
17 to 18

Alloy Composition

Aluminum (Al), % 96.1 to 98.6
0
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.050
0 to 0.1
Iron (Fe), % 0 to 0.45
0
Magnesium (Mg), % 1.4 to 2.1
92.1 to 93.9
Manganese (Mn), % 0 to 0.25
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.3
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3