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Z21721 Zinc vs. 851.0 Aluminum

Z21721 zinc belongs to the zinc alloys classification, while 851.0 aluminum belongs to the aluminum alloys. There are 25 material properties with values for both materials. Properties with values for just one material (4, 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 Z21721 zinc and the bottom bar is 851.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
69
Elongation at Break, % 40
3.9 to 9.1
Poisson's Ratio 0.25
0.33
Shear Modulus, GPa 35
26
Tensile Strength: Ultimate (UTS), MPa 150
130 to 140

Thermal Properties

Latent Heat of Fusion, J/g 110
410
Maximum Temperature: Mechanical, °C 90
180
Melting Completion (Liquidus), °C 410
630
Melting Onset (Solidus), °C 390
360
Specific Heat Capacity, J/kg-K 390
850
Thermal Conductivity, W/m-K 110
180
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
46
Electrical Conductivity: Equal Weight (Specific), % IACS 37
140

Otherwise Unclassified Properties

Base Metal Price, % relative 11
14
Density, g/cm3 6.6
3.1
Embodied Carbon, kg CO2/kg material 2.8
8.4
Embodied Energy, MJ/kg 53
160
Embodied Water, L/kg 340
1140

Common Calculations

Stiffness to Weight: Axial, points 7.3
13
Stiffness to Weight: Bending, points 22
45
Strength to Weight: Axial, points 6.4
12 to 13
Strength to Weight: Bending, points 9.6
19 to 20
Thermal Diffusivity, mm2/s 44
69
Thermal Shock Resistance, points 4.8
6.1 to 6.3

Alloy Composition


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Aluminum (Al), % 0 to 0.0020
86.6 to 91.5
Cadmium (Cd), % 0 to 0.070
0
Copper (Cu), % 0 to 0.0050
0.7 to 1.3
Iron (Fe), % 0 to 0.010
0 to 0.7
Lead (Pb), % 0 to 1.0
0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0
0 to 0.1
Nickel (Ni), % 0
0.3 to 0.7
Silicon (Si), % 0
2.0 to 3.0
Tin (Sn), % 0
5.5 to 7.0
Titanium (Ti), % 0 to 0.020
0 to 0.2
Zinc (Zn), % 98.9 to 100
0
Residuals, % 0
0 to 0.3