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Z21721 Zinc vs. 7049 Aluminum

Z21721 zinc belongs to the zinc alloys classification, while 7049 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 7049 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
70
Elongation at Break, % 40
6.2 to 7.0
Poisson's Ratio 0.25
0.32
Shear Modulus, GPa 35
27
Tensile Strength: Ultimate (UTS), MPa 150
510 to 530
Tensile Strength: Yield (Proof), MPa 120
420 to 450

Thermal Properties

Latent Heat of Fusion, J/g 110
370
Maximum Temperature: Mechanical, °C 90
180
Melting Completion (Liquidus), °C 410
640
Melting Onset (Solidus), °C 390
480
Specific Heat Capacity, J/kg-K 390
860
Thermal Conductivity, W/m-K 110
130
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
36
Electrical Conductivity: Equal Weight (Specific), % IACS 37
110

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 6.6
3.1
Embodied Carbon, kg CO2/kg material 2.8
8.1
Embodied Energy, MJ/kg 53
140
Embodied Water, L/kg 340
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
31 to 34
Resilience: Unit (Modulus of Resilience), kJ/m3 88
1270 to 1440
Stiffness to Weight: Axial, points 7.3
13
Stiffness to Weight: Bending, points 22
45
Strength to Weight: Axial, points 6.4
46 to 47
Strength to Weight: Bending, points 9.6
46 to 47
Thermal Diffusivity, mm2/s 44
51
Thermal Shock Resistance, points 4.8
22 to 23

Alloy Composition


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Aluminum (Al), % 0 to 0.0020
85.7 to 89.5
Cadmium (Cd), % 0 to 0.070
0
Chromium (Cr), % 0
0.1 to 0.22
Copper (Cu), % 0 to 0.0050
1.2 to 1.9
Iron (Fe), % 0 to 0.010
0 to 0.35
Lead (Pb), % 0 to 1.0
0
Magnesium (Mg), % 0
2.0 to 2.9
Manganese (Mn), % 0
0 to 0.2
Silicon (Si), % 0
0 to 0.25
Titanium (Ti), % 0 to 0.020
0 to 0.1
Zinc (Zn), % 98.9 to 100
7.2 to 8.2
Residuals, % 0
0 to 0.15