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5251 Aluminum vs. Zamak 2

5251 aluminum belongs to the aluminum alloys classification, while Zamak 2 belongs to the zinc alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, 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 5251 aluminum and the bottom bar is Zamak 2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 44 to 79
100
Elastic (Young's, Tensile) Modulus, GPa 68
87
Elongation at Break, % 2.0 to 19
6.0
Fatigue Strength, MPa 59 to 110
59
Poisson's Ratio 0.33
0.26
Shear Modulus, GPa 26
33
Shear Strength, MPa 110 to 160
320
Tensile Strength: Ultimate (UTS), MPa 180 to 280
360
Tensile Strength: Yield (Proof), MPa 67 to 250
270

Thermal Properties

Latent Heat of Fusion, J/g 400
130
Maximum Temperature: Mechanical, °C 180
95
Melting Completion (Liquidus), °C 650
390
Melting Onset (Solidus), °C 610
380
Specific Heat Capacity, J/kg-K 900
410
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 24
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
25
Electrical Conductivity: Equal Weight (Specific), % IACS 120
35

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
6.5
Embodied Carbon, kg CO2/kg material 8.5
3.0
Embodied Energy, MJ/kg 150
57
Embodied Water, L/kg 1180
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.4 to 27
20
Resilience: Unit (Modulus of Resilience), kJ/m3 33 to 450
420
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 50
23
Strength to Weight: Axial, points 18 to 29
15
Strength to Weight: Bending, points 26 to 35
17
Thermal Diffusivity, mm2/s 61
41
Thermal Shock Resistance, points 7.9 to 13
11

Alloy Composition


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Aluminum (Al), % 95.5 to 98.2
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
2.5 to 3.3
Iron (Fe), % 0 to 0.5
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 1.7 to 2.4
0.020 to 0.060
Manganese (Mn), % 0.1 to 0.5
0
Nickel (Ni), % 0
0 to 0.020
Silicon (Si), % 0 to 0.4
0 to 0.030
Tin (Sn), % 0
0 to 0.0030
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.15
92.2 to 94
Residuals, % 0 to 0.15
0