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ZK40A Magnesium vs. 6012 Aluminum

ZK40A magnesium belongs to the magnesium alloys classification, while 6012 aluminum belongs to the aluminum alloys.

For each property being compared, the top bar is ZK40A magnesium and the bottom bar is 6012 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
69
Elongation at Break, % 4.2
9.1 to 11
Fatigue Strength, MPa 190
55 to 100
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
26
Shear Strength, MPa 160
130 to 190
Tensile Strength: Ultimate (UTS), MPa 280
220 to 320
Tensile Strength: Yield (Proof), MPa 260
110 to 260

Thermal Properties

Latent Heat of Fusion, J/g 340
400
Maximum Temperature: Mechanical, °C 120
170
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 540
570
Specific Heat Capacity, J/kg-K 970
890
Thermal Conductivity, W/m-K 110
160
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
45
Electrical Conductivity: Equal Weight (Specific), % IACS 130
140

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 1.8
2.9
Embodied Carbon, kg CO2/kg material 24
8.2
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 950
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
21 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 740
94 to 480
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 65
48
Strength to Weight: Axial, points 43
22 to 32
Strength to Weight: Bending, points 53
29 to 37
Thermal Diffusivity, mm2/s 62
62
Thermal Shock Resistance, points 17
10 to 14

Alloy Composition

Aluminum (Al), % 0
92.2 to 98
Bismuth (Bi), % 0
0 to 0.7
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0
0 to 0.5
Lead (Pb), % 0
0.4 to 2.0
Magnesium (Mg), % 94.2 to 96.1
0.6 to 1.2
Manganese (Mn), % 0
0.4 to 1.0
Silicon (Si), % 0
0.6 to 1.4
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 3.5 to 4.5
0 to 0.3
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0
0 to 0.15