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Commercially Pure Zinc vs. Zamak 7

Both commercially pure zinc and Zamak 7 are zinc alloys. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 96% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is commercially pure zinc and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
86
Elongation at Break, % 38
13
Poisson's Ratio 0.25
0.25
Shear Modulus, GPa 35
33
Tensile Strength: Ultimate (UTS), MPa 97
280
Tensile Strength: Yield (Proof), MPa 79
250

Thermal Properties

Latent Heat of Fusion, J/g 110
120
Maximum Temperature: Mechanical, °C 90
95
Melting Completion (Liquidus), °C 410
390
Melting Onset (Solidus), °C 400
380
Specific Heat Capacity, J/kg-K 390
410
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 26
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
27
Electrical Conductivity: Equal Weight (Specific), % IACS 37
38

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 34
36
Resilience: Unit (Modulus of Resilience), kJ/m3 36
370
Stiffness to Weight: Axial, points 7.4
7.5
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 4.1
12
Strength to Weight: Bending, points 7.1
15
Thermal Diffusivity, mm2/s 44
43
Thermal Shock Resistance, points 3.0
8.6

Alloy Composition

Aluminum (Al), % 0 to 0.010
3.5 to 4.3
Cadmium (Cd), % 0 to 0.010
0 to 0.0020
Copper (Cu), % 0 to 0.080
0 to 0.25
Iron (Fe), % 0 to 0.020
0 to 0.075
Lead (Pb), % 0 to 0.030
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Nickel (Ni), % 0
0.0050 to 0.020
Tin (Sn), % 0 to 0.0030
0 to 0.0010
Titanium (Ti), % 0 to 0.020
0
Zinc (Zn), % 99.827 to 100
95.3 to 96.5