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2018 Aluminum vs. ZA-8

2018 aluminum belongs to the aluminum alloys classification, while ZA-8 belongs to the zinc alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 2018 aluminum and the bottom bar is ZA-8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 120
87 to 100
Elastic (Young's, Tensile) Modulus, GPa 73
85 to 86
Elongation at Break, % 9.6
1.3 to 8.0
Fatigue Strength, MPa 120
51 to 100
Poisson's Ratio 0.33
0.26
Shear Modulus, GPa 27
34
Shear Strength, MPa 270
240 to 280
Tensile Strength: Ultimate (UTS), MPa 420
210 to 370
Tensile Strength: Yield (Proof), MPa 310
210 to 290

Thermal Properties

Latent Heat of Fusion, J/g 390
110
Maximum Temperature: Mechanical, °C 220
100
Melting Completion (Liquidus), °C 640
400
Melting Onset (Solidus), °C 510
380
Specific Heat Capacity, J/kg-K 870
440
Thermal Conductivity, W/m-K 150
120
Thermal Expansion, µm/m-K 22
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
28
Electrical Conductivity: Equal Weight (Specific), % IACS 120
40

Otherwise Unclassified Properties

Base Metal Price, % relative 11
11
Density, g/cm3 3.1
6.3
Embodied Carbon, kg CO2/kg material 8.1
3.3
Embodied Energy, MJ/kg 150
62
Embodied Water, L/kg 1130
420

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
2.8 to 28
Resilience: Unit (Modulus of Resilience), kJ/m3 670
260 to 490
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 45
23
Strength to Weight: Axial, points 38
9.3 to 17
Strength to Weight: Bending, points 41
12 to 18
Thermal Diffusivity, mm2/s 57
42
Thermal Shock Resistance, points 19
7.6 to 13

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
8.0 to 8.8
Cadmium (Cd), % 0
0 to 0.0060
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0.8 to 1.3
Iron (Fe), % 0 to 1.0
0 to 0.075
Lead (Pb), % 0
0 to 0.0060
Magnesium (Mg), % 0.45 to 0.9
0.015 to 0.030
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0 to 0.020
Silicon (Si), % 0 to 0.9
0 to 0.045
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0 to 0.25
89.7 to 91.2
Residuals, % 0 to 0.15
0