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Commercially Pure Zinc vs. Z21721 Zinc

Both commercially pure zinc and Z21721 zinc are zinc alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is commercially pure zinc and the bottom bar is Z21721 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
87
Elongation at Break, % 38
40
Poisson's Ratio 0.25
0.25
Shear Modulus, GPa 35
35
Tensile Strength: Ultimate (UTS), MPa 97
150
Tensile Strength: Yield (Proof), MPa 79
120

Thermal Properties

Latent Heat of Fusion, J/g 110
110
Maximum Temperature: Mechanical, °C 90
90
Melting Completion (Liquidus), °C 410
410
Melting Onset (Solidus), °C 400
390
Specific Heat Capacity, J/kg-K 390
390
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 26
26

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 34
57
Resilience: Unit (Modulus of Resilience), kJ/m3 36
88
Stiffness to Weight: Axial, points 7.4
7.3
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 4.1
6.4
Strength to Weight: Bending, points 7.1
9.6
Thermal Diffusivity, mm2/s 44
44
Thermal Shock Resistance, points 3.0
4.8

Alloy Composition

Aluminum (Al), % 0 to 0.010
0 to 0.0020
Cadmium (Cd), % 0 to 0.010
0 to 0.070
Copper (Cu), % 0 to 0.080
0 to 0.0050
Iron (Fe), % 0 to 0.020
0 to 0.010
Lead (Pb), % 0 to 0.030
0 to 1.0
Tin (Sn), % 0 to 0.0030
0
Titanium (Ti), % 0 to 0.020
0 to 0.020
Zinc (Zn), % 99.827 to 100
98.9 to 100