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2017 Aluminum vs. ZK40A Magnesium

2017 aluminum belongs to the aluminum alloys classification, while ZK40A magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 2017 aluminum and the bottom bar is ZK40A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
45
Elongation at Break, % 12 to 18
4.2
Fatigue Strength, MPa 90 to 130
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 130 to 260
160
Tensile Strength: Ultimate (UTS), MPa 190 to 430
280
Tensile Strength: Yield (Proof), MPa 76 to 260
260

Thermal Properties

Latent Heat of Fusion, J/g 390
340
Maximum Temperature: Mechanical, °C 190
120
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 510
540
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
27
Electrical Conductivity: Equal Weight (Specific), % IACS 110
130

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 1140
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 66
12
Resilience: Unit (Modulus of Resilience), kJ/m3 41 to 470
740
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
65
Strength to Weight: Axial, points 17 to 40
43
Strength to Weight: Bending, points 24 to 42
53
Thermal Diffusivity, mm2/s 56
62
Thermal Shock Resistance, points 7.9 to 18
17

Alloy Composition

Aluminum (Al), % 91.6 to 95.5
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0.4 to 0.8
94.2 to 96.1
Manganese (Mn), % 0.4 to 1.0
0
Silicon (Si), % 0.2 to 0.8
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
3.5 to 4.5
Zirconium (Zr), % 0
0.45 to 1.0
Residuals, % 0
0 to 0.3