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Zamak 2 vs. 7178 Aluminum

Zamak 2 belongs to the zinc alloys classification, while 7178 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 Zamak 2 and the bottom bar is 7178 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
71
Elongation at Break, % 6.0
4.5 to 12
Fatigue Strength, MPa 59
120 to 210
Poisson's Ratio 0.26
0.32
Shear Modulus, GPa 33
27
Shear Strength, MPa 320
140 to 380
Tensile Strength: Ultimate (UTS), MPa 360
240 to 640
Tensile Strength: Yield (Proof), MPa 270
120 to 560

Thermal Properties

Latent Heat of Fusion, J/g 130
370
Maximum Temperature: Mechanical, °C 95
180
Melting Completion (Liquidus), °C 390
630
Melting Onset (Solidus), °C 380
480
Specific Heat Capacity, J/kg-K 410
860
Thermal Conductivity, W/m-K 110
130
Thermal Expansion, µm/m-K 28
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
31
Electrical Conductivity: Equal Weight (Specific), % IACS 35
91

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 6.5
3.1
Embodied Carbon, kg CO2/kg material 3.0
8.2
Embodied Energy, MJ/kg 57
150
Embodied Water, L/kg 380
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
24 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 420
110 to 2220
Stiffness to Weight: Axial, points 7.5
13
Stiffness to Weight: Bending, points 23
45
Strength to Weight: Axial, points 15
21 to 58
Strength to Weight: Bending, points 17
28 to 54
Thermal Diffusivity, mm2/s 41
47
Thermal Shock Resistance, points 11
10 to 28

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
85.4 to 89.5
Cadmium (Cd), % 0 to 0.0050
0
Chromium (Cr), % 0
0.18 to 0.28
Copper (Cu), % 2.5 to 3.3
1.6 to 2.4
Iron (Fe), % 0 to 0.1
0 to 0.5
Lead (Pb), % 0 to 0.0050
0
Magnesium (Mg), % 0.020 to 0.060
2.4 to 3.1
Manganese (Mn), % 0
0 to 0.3
Nickel (Ni), % 0 to 0.020
0
Silicon (Si), % 0 to 0.030
0 to 0.4
Tin (Sn), % 0 to 0.0030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 92.2 to 94
6.3 to 7.3
Residuals, % 0
0 to 0.15