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EN AC-42100 Aluminum vs. ZK51A Magnesium

EN AC-42100 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-42100 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 3.4 to 9.0
4.7
Fatigue Strength, MPa 76 to 82
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Tensile Strength: Ultimate (UTS), MPa 280 to 290
240
Tensile Strength: Yield (Proof), MPa 210 to 230
150

Thermal Properties

Latent Heat of Fusion, J/g 500
340
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 610
640
Melting Onset (Solidus), °C 600
550
Specific Heat Capacity, J/kg-K 910
970
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 22
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
28
Electrical Conductivity: Equal Weight (Specific), % IACS 140
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.6
1.8
Embodied Carbon, kg CO2/kg material 8.0
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1110
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
10
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
260
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
64
Strength to Weight: Axial, points 30 to 31
36
Strength to Weight: Bending, points 37 to 38
47
Thermal Diffusivity, mm2/s 66
61
Thermal Shock Resistance, points 13
15

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Copper (Cu), % 0 to 0.050
0 to 0.1
Iron (Fe), % 0 to 0.19
0
Magnesium (Mg), % 0.25 to 0.45
93.1 to 95.9
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 6.5 to 7.5
0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3