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EN AC-21200 Aluminum vs. ZK51A Magnesium

EN AC-21200 aluminum belongs to the aluminum alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN AC-21200 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
45
Elongation at Break, % 3.9 to 6.2
4.7
Fatigue Strength, MPa 110 to 130
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
18
Tensile Strength: Ultimate (UTS), MPa 410 to 440
240
Tensile Strength: Yield (Proof), MPa 270 to 360
150

Thermal Properties

Latent Heat of Fusion, J/g 390
340
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 660
640
Melting Onset (Solidus), °C 550
550
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 130
110
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
28
Electrical Conductivity: Equal Weight (Specific), % IACS 100
140

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.0
1.8
Embodied Carbon, kg CO2/kg material 8.0
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1150
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 22
10
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 930
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
64
Strength to Weight: Axial, points 38 to 40
36
Strength to Weight: Bending, points 41 to 43
47
Thermal Diffusivity, mm2/s 49
61
Thermal Shock Resistance, points 18 to 19
15

Alloy Composition

Aluminum (Al), % 93.3 to 95.7
0
Copper (Cu), % 4.0 to 5.0
0 to 0.1
Iron (Fe), % 0 to 0.2
0
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0.15 to 0.5
93.1 to 95.9
Manganese (Mn), % 0.2 to 0.5
0
Nickel (Ni), % 0 to 0.050
0 to 0.010
Silicon (Si), % 0 to 0.1
0
Tin (Sn), % 0 to 0.030
0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.1
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3