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Zamak 5 vs. Z21721 Zinc

Both Zamak 5 and Z21721 zinc are zinc alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 95% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is Zamak 5 and the bottom bar is Z21721 zinc.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
87
Elongation at Break, % 6.3
40
Poisson's Ratio 0.25
0.25
Shear Modulus, GPa 33
35
Tensile Strength: Ultimate (UTS), MPa 330
150
Tensile Strength: Yield (Proof), MPa 240
120

Thermal Properties

Latent Heat of Fusion, J/g 120
110
Maximum Temperature: Mechanical, °C 95
90
Melting Completion (Liquidus), °C 390
410
Melting Onset (Solidus), °C 380
390
Specific Heat Capacity, J/kg-K 410
390
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 27
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
27
Electrical Conductivity: Equal Weight (Specific), % IACS 37
37

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 6.4
6.6
Embodied Carbon, kg CO2/kg material 3.0
2.8
Embodied Energy, MJ/kg 57
53
Embodied Water, L/kg 380
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
57
Resilience: Unit (Modulus of Resilience), kJ/m3 330
88
Stiffness to Weight: Axial, points 7.5
7.3
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 14
6.4
Strength to Weight: Bending, points 16
9.6
Thermal Diffusivity, mm2/s 42
44
Thermal Shock Resistance, points 9.9
4.8

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0 to 0.0020
Cadmium (Cd), % 0 to 0.0050
0 to 0.070
Copper (Cu), % 0.7 to 1.3
0 to 0.0050
Iron (Fe), % 0 to 0.1
0 to 0.010
Lead (Pb), % 0 to 0.0050
0 to 1.0
Magnesium (Mg), % 0.025 to 0.080
0
Nickel (Ni), % 0 to 0.020
0
Silicon (Si), % 0 to 0.030
0
Tin (Sn), % 0 to 0.0030
0
Titanium (Ti), % 0
0 to 0.020
Zinc (Zn), % 94.3 to 95.7
98.9 to 100