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5056 Aluminum vs. ZK61A Magnesium

5056 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 (2, in this case) are not shown.

For each property being compared, the top bar is 5056 aluminum and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
46
Elongation at Break, % 4.9 to 31
5.8 to 7.1
Fatigue Strength, MPa 140 to 200
120 to 140
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
18
Shear Strength, MPa 170 to 240
170 to 180
Tensile Strength: Ultimate (UTS), MPa 290 to 460
290 to 310
Tensile Strength: Yield (Proof), MPa 150 to 410
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 570
530
Specific Heat Capacity, J/kg-K 910
960
Thermal Conductivity, W/m-K 130
120
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29
29
Electrical Conductivity: Equal Weight (Specific), % IACS 99
130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
1.9
Embodied Carbon, kg CO2/kg material 9.0
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 140
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 1220
370 to 420
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
62
Strength to Weight: Axial, points 30 to 48
42 to 45
Strength to Weight: Bending, points 36 to 50
50 to 53
Thermal Diffusivity, mm2/s 53
65
Thermal Shock Resistance, points 13 to 20
17 to 18

Alloy Composition

Aluminum (Al), % 93 to 95.4
0
Chromium (Cr), % 0.050 to 0.2
0
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.4
0
Magnesium (Mg), % 4.5 to 5.6
92.1 to 93.9
Manganese (Mn), % 0.050 to 0.2
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.3
0
Zinc (Zn), % 0 to 0.1
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3