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6261 Aluminum vs. ZK51A Magnesium

6261 aluminum belongs to the aluminum alloys classification, while ZK51A 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 6261 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 9.0 to 16
4.7
Fatigue Strength, MPa 60 to 120
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 90 to 180
160
Tensile Strength: Ultimate (UTS), MPa 150 to 300
240
Tensile Strength: Yield (Proof), MPa 100 to 260
150

Thermal Properties

Latent Heat of Fusion, J/g 400
340
Maximum Temperature: Mechanical, °C 160
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
550
Specific Heat Capacity, J/kg-K 900
970
Thermal Conductivity, W/m-K 180
110
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 48
28
Electrical Conductivity: Equal Weight (Specific), % IACS 160
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
1.8
Embodied Carbon, kg CO2/kg material 8.3
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21 to 27
10
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 500
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
64
Strength to Weight: Axial, points 15 to 31
36
Strength to Weight: Bending, points 23 to 37
47
Thermal Diffusivity, mm2/s 75
61
Thermal Shock Resistance, points 6.5 to 13
15

Alloy Composition

Aluminum (Al), % 96.6 to 98.6
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.15 to 0.4
0 to 0.1
Iron (Fe), % 0 to 0.4
0
Magnesium (Mg), % 0.7 to 1.0
93.1 to 95.9
Manganese (Mn), % 0.2 to 0.35
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0.4 to 0.7
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3